Showing papers on "Sodium chlorate published in 2015"
TL;DR: In this paper, the technology of molybdenum extraction from rhenium concentrate by using either potassium chlorate (KClO3) or sodium chlorates (NaClO 3) has been investigated.
Abstract: The technology of molybdenum extraction from molybdenite concentrate by using potassium chlorate (KClO3) or sodium chlorate (NaClO3) has been investigated. The results show that leaching time, leaching temperature, agitation speed, oxidizer type, potassium or sodium chlorate, and hydrochloric acid concentration have significant effect on the molybdenum extraction efficiency. Optimum process operating parameters were established as follows: 4 hrs, hydrochloric acid concentration: 35%, solids ratio: 5%, temperature: 65-70°C, agitation speed: 600 rpm, the mass of potassium chlorate and sodium chlorate: 25 g. Under these experimental conditions, the extraction of molybdenum and rhenium were obtained about 85% and 100%, respectively.
11 citations
Patent•
07 Jan 2015
TL;DR: In this article, a method for the preparation of chlorine dioxide without production of solids was proposed, which is based on filtering a concentrated sodium chlorate solution sent from an electrolytic bath, then injecting into a generator to form a reaction mother solution, circulating in the generator and a circulating pipeline under the action of a circulating pump.
Abstract: The invention discloses a preparation method of chlorine dioxide without production of solids. The method comprises the following steps: filtering a concentrated sodium chlorate solution sent from an electrolytic bath, then injecting into a generator to form a reaction mother solution, circulating in the generator and a circulating pipeline under the action of a circulating pump, maintaining the reaction mother solution at a certain density and temperature, then adding hydrochloric acid sent from a hydrochloric acid system, reacting to generate chlorine gas, chlorine dioxide gas and sodium chloride, cooling the chlorine dioxide gas, then absorbing the chlorine dioxide gas by low-temperature chilled water to obtain a chlorine dioxide water solution, sending the chlorine gas produced by reaction into a hydrochloric acid furnace to be burned with hydrogen gas produced in the electrolytic bath to prepare hydrochloric acid, and returning a dilute sodium chlorate solution after reaction into the electrolytic bath by a pump for re-preparing the concentrated sodium chlorate solution for recycling. According to the method disclosed by the invention, the production of the solids can be prevented in the whole reaction process and scaling of equipment can be avoided, so that sodium chloride and sodium dichromate can be completely recycled and do not need to be supplemented basically.
7 citations
Patent•
14 Oct 2015
TL;DR: In this article, a gas phase oxidization-liquid phase oxidisation-absorption three-section type dry-wet-process flue gas denitration process is described.
Abstract: The invention discloses a gas phase oxidization-liquid phase oxidization-absorption three-section type dry-wet-process flue gas denitration process. According to the process, ozone is used as a gas-phase oxidant to oxidize one part of nitric oxide in flue gas into high-valence-state nitric oxide capable of being absorbed by slurry; any one or a mixture solution of more of hydrogen peroxide, sodium hypochlorite, sodium chlorite, sodium chlorate, sodium persulfate, potassium chlorate, potassium hypermanganate and potassium dichromate is sprayed to be used as a liquid-phase oxidant to oxidize the residual high-valence-state nitric oxide in the flue gas into the high-valence-state nitric oxide; and the flue gas enters an absorption tower and a magnesium hydroxide solution is sprayed to absorb the high-valence-state nitric oxide. Compared with the prior art, the process firstly adopts two times of oxidization of a gas phase and a liquid phase and a magnesium oxide wet process is used for absorbing so that a target of efficiently removing the nitric oxide is realized; and by virtue of the technical scheme, the use amount of the ozone is reduced, the equipment cost and operation cost are reduced and the denitration efficiency is improved and can reach more than or equal to 93%.
7 citations
Patent•
18 Feb 2015
TL;DR: A steel surface treating agent integrating the functions of oil removal, rust removal, oxide layer removal and phosphorization, is particularly suitable for the metals obtained after hot rolling process, and is simple in treating process, low in labor intensity and low in treating cost, remarkable in rust removal effect, long in holding time and pollution-free to environment as discussed by the authors.
Abstract: The invention discloses a steel surface treating agent and a preparation method thereof The preparation method comprises the following steps: adding a rust remover, potassium chlorate, sodium chlorate, a corrosion inhibitor, a surfactant, zinc nitrate and peregal in deionized water, adding zinc oxide after mixing uniformly, and mixing uniformly again for standby application, wherein the raw materials in the steps in percentage by weight are as follows: 01-05% of zinc oxide, 01-1% of potassium chlorate, 10-40% of a rust remover, 1-5% of peregal, 01-2% of zinc nitrate, 05-10% of a corrosion inhibitor, 01-1% of sodium chlorate and 1-6% of a surfactant; the deionized water is added to 100% The steel surface treating agent integrates the functions of oil removal, rust removal, oxide layer removal and phosphorization, is particularly suitable for the metals obtained after hot rolling process, and is simple in treating process, low in labor intensity, low in treating cost, remarkable in rust removal effect, long in holding time and pollution-free to environment
6 citations
Patent•
26 Aug 2015
TL;DR: A refining method for removing chlorate from salt water includes adding stoichiometric sodium pyrosulfite solution or solid according to the content of chlorate in salt water as discussed by the authors.
Abstract: A refining method for removing chlorate from salt water includes adding stoichiometric sodium pyrosulfite solution or solid according to the content of chlorate in salt water to enable the sodium pyrosulfite to have chemical reaction with the chlorate to decompose the cholorate into a compound soluble in water Other substances in the salt water do not react with the compound, acid generated in reaction is neutralized by alkaline to enable the pH value to be 8-12 and further enable the content of chlorate in the salt water to be smaller than 5 g/l (calculated by sodium chlorate), and the requirements for salt water control index can be met
5 citations
Patent•
25 Mar 2015
TL;DR: In this paper, a process of converting chemically before applying an organic coating to steel power transmission and transformation equipment, belonging to the technical field of steel corrosion, is described, which comprises the following 4 steps: decontaminating and derusting, converting, washing with water and drying.
Abstract: The invention discloses a process of converting chemically before applying an organic coating to steel power transmission and transformation equipment, belonging to the technical field of steel corrosion. The process comprises the following 4 steps: decontaminating and derusting, converting, washing with water and drying. The components of a conversion solution comprise 20-50g/L H3PO4, 10-20g/L ZnO, 10-15g/L MnH2PO4, a 50-100g/L accelerator, a 10-15g/L complexing agent and a 2-8g/L corrosion inhibitor, wherein the accelerator is sodium nitrate, zinc nitrate, calcium nitrate, sodium nitrite, potassium chlorate, sodium chlorate, potassium permanganate, sodium molybdate, manganese molybdate and/or hydrogen peroxide, the complexing agent is citric acid, tartaric acid and/or EOTA, and the corrosion inhibitor is thiourea and/or hexamethylenetetramine. The surface of a workpiece treated by adopting the process is clean and compact and has a certain insulation resistance. Because the surface of the workpiece is treated by adopting the process, the effective contact area of the surface of the workpiece and the organic coating applied on the surface of the workpiece subsequently can be improved significantly, the adhesion of the organic coating can be enhanced, and thus the overall corrosion resistance of a steel component can be improved effectively.
5 citations
TL;DR: In this article, a density functional theory analysis indicates a direct, SN2-like pathway as the norm for OAT reactions involving oxo-bridged intermediates, and the basic question as to whether such reactions are one-step, SN 2-like displacements or multistep, involving oxobied intermediates remains largely unanswered.
Abstract: Oxygen atom transfer (OAT) between main-group elements is pivotal to a number of industrial processes such as the synthesis of thionyl chloride (SO3 + SCl2 SO2 + SOCl2) and sodium chlorate (3 NaOCl NaClO3 + 2 NaCl), as well as the historic method of CO detection in mines via its reaction with I2O5 (I2O5 + 5 CO I2 + 5 CO2). Surprisingly, little is known about the mechanisms of these and other OAT reactions involving main-group elements. Even the basic question as to whether such reactions are one-step, SN2-like displacements or multistep, involving oxo-bridged intermediates, remains largely unanswered. Extensive density functional theory calculations reported herein indicate a direct, SN2-like pathway as the norm for such processes.
3 citations
Patent•
21 Oct 2015
TL;DR: In this paper, a production method for polyferric chloride sulfate using rolling steel acid pickling waste liquid and ferrous sulfate as raw materials and with sodium chlorate as an oxidizing agent is presented.
Abstract: The invention discloses a production method for polyferric chloride sulfate. According to the method, polyferric chloride sulfate is obtained by conducting oxidation and hydrolytic polymerization reaction at the normal temperature with rolling steel acid pickling waste liquid and ferrous sulfate as raw materials and with sodium chlorate as an oxidizing agent. Accodring to the method for preparing the polyferric chloride sulfate through the rolling steel acid pickling waste liquid, the acid pickling waste liquid is utilized, and no emission or pollution is caused in the whole production process. The polyferric chloride sulfate produced with the rolling steel acid pickling waste liquid and the ferrous sulfate as the raw materials is a liquid product by directly conducting oxidation, hydrolysis and polymerization through sodium chlorate, and the solid sodium chlorate can be prepared after drying is conducted. Compared with a traditional production process, the production cost is saved by 30% or above. The use effect of the prepared project is superior to those of polymerization ferric chloride and the polymeric ferric sulfate.
2 citations
23 Jun 2015
TL;DR: In this paper, the authors present experiments with sixteen water-soluble compounds, whose saturated solutions evaporated at ambient condition to assess their ability to produce macroscopic, idiomorphic crystals.
Abstract: This paper presents experiments with sixteen water-soluble compounds, whose saturated solutions evaporated at ambient condition to assess their ability to produce macroscopic, idiomorphic crystals. Of the compounds tested, two yielded seeds and macroscopic crystals in two weeks (copper sulfate pentahydrate, sodium chloride - coarse salt), six produced macroscopic crystals after two weeks (ammonium phosphate monobasic, sodium bromate, magnesium sulfate heptahydrate, sulfate nickel chloride hexahydrate, aluminum potassium sulphate dodecahydrate, sodium tartrate tetrahydrate and potassium), and eight did not produce macroscopic crystals (calcium acetate monohydrate, copper acetate monohydrate, analytical grade sodium chloride, sodium chromate tetrahydrate, sodium nitrate, potassium ferrocyanide trihydrate, sodium chlorate, potassium chloride). The experimental results indicate that the solutions of compounds that allow a higher degree of supersaturation, i. e. a wider metastable zone, have better performance in crystallization experiments in terms of formation of macroscopic crystals. These experiments allow addressing various topics of the National Curriculum Parameters for primary and secondary education, and higher education in disciplines as fundamental chemistry and crystallography.
2 citations
Patent•
25 Mar 2015
TL;DR: In this paper, an extraction process of iron mine sintered smoke dust valuable elements is described, which is capable of effectively extracting potassium, copper and silver, and has good social benefit and economic benefit.
Abstract: The invention discloses an extraction process of iron mine sintered smoke dust valuable elements. The process comprises the following steps: a, adding water to titanium dioxide waste acid to prepare an acid solution, and then adding sodium dodecyl sulfate and iron mine sintered smoke dust to perform leaching to obtain lead skim and leaching liquor; b, extracting the leaching liquor to obtain a copper-containing extracted organic phase and raffinate aqueous solution; c, adding sodium bromide to obtain silver bromide sediment and a filtrate; d, washing and drying the silver bromide sediment to obtain a silver bromide product; e, adding sodium carbonate, activated carbon and polysilicate ferric aluminum to the filtrate to obtain a colorless and transparent filtrate; f, adding sodium chlorate, and filtering to obtain a potassium chlorate product; adding the filtrate into the colorless and transparent filtrate obtained in the step e to use; g, when the mass concentration of sodium in the filtrate obtained through filtering and separating in the step f is greater than 280g/L, evaporating, concentrating and crystallizing to obtain an industrial sodium chloride product. The process disclosed by the invention is capable of effectively extracting potassium, copper and silver, and has good social benefit and economic benefit.
Patent•
11 Mar 2015
TL;DR: In this article, a composite material for lithium batteries and a preparation method thereof is presented. The composite material comprises the following components: polycarbonate, sodium bicarbonate, polyethylene glycol, dichloromethane, graphene, polyester fiber, sodium chlorate, zinc acetate dihydrate, ethyl acetate and acrylamide.
Abstract: The invention discloses a composite material for lithium batteries and a preparation method thereof. The composite material comprises the following components: polycarbonate, sodium bicarbonate, polyethylene glycol, dichloromethane, graphene, polyester fiber, sodium chlorate, zinc acetate dihydrate, ethyl acetate and acrylamide. The preparation method includes: firstly stirring and mixing polycarbonate with sodium bicarbonate, polyethylene glycol and dichloromethane at room temperature, then removing dichloromethane to obtain a mixture 1; then mixing graphene, polyester fiber, sodium chlorate, zinc acetate dehydrate and ethyl acetate, adding acrylamide, carrying out heating reaction to remove ethyl acetate so as to obtain a mixture 2; and finally mixing the mixture 1 with the mixture 2, in an inert gas atmosphere, performing heating carbonization, and then conducting natural cooling to room temperature, washing the solid residue with an alkaline solution, then performing washing with deionized water, and carrying out vacuum drying, thus obtaining the composite material for lithium batteries. The material provided by the invention has superior properties, and can be applied widely.
Patent•
07 Jan 2015
TL;DR: In this article, a normal-temperature wiping phosphating solution and a preparation method thereof are described. But the preparation method is not suitable for painting, as it is not required to be washed with water after being coated on a workpiece, and a generated phosphating film is not hygroscopic and high in adhesion to a powdery coating and a paint.
Abstract: The invention discloses a normal-temperature wiping phosphating solution and a preparation method thereof. The phosphating solution comprises zinc oxide, phosphoric acid, calcium nitrate, nickel nitrate, citric acid, sodium nitrite, sodium chlorate, sodium molybdate, inositol hexaphosphoric acid, petroleum sodium sulfonate, phenylethanolamine, 2-acrylamide dodecyl sulfonate, N,N-dimethylacrylamide and water. The preparation method comprises the following steps of adding zinc oxide, calcium nitrate and nickel nitrate into water, raising the temperature, performing uniform stirring, naturally cooling the mixed solution, adding phosphoric acid, sodium nitrite and petroleum sodium sulfonate, preserving the heat with stirring, adding citric acid, sodium chlorate, sodium molybdate, inositol hexaphosphoric acid and phenylethanolamine, preserving the heat with stirring, finally adding 2-acrylamide dodecyl sulfonate and N,N-dimethylacrylamide, preserving the heat, performing uniform stirring, and naturally cooling the mixed solution to obtain the phosphating solution. The phosphating solution is not required to be washed with water after being coated on a workpiece, and a generated phosphating film is non-hygroscopic and high in adhesion to a powdery coating and a paint.
Patent•
15 Jul 2015
TL;DR: In this paper, the authors proposed an antifouling paint for a ship, which comprises: a resin compound; a solvent; and a liquid anti-ouling agent, wherein the liquid ant-ouming agent is formed by mixing 10 to 200 parts by weight of a mixture which is produced by mixing one or more compounds selected from the group consisting of manganese dioxide (MnO_2), methyl cellosolve, sodium chlorate (NaClO-2), sodium perchlorate (NClO_4), sodium oxide (NaO_3
Abstract: The present invention relates to an antifouling paint for a ship, which comprises: a resin compound; a solvent; and a liquid antifouling agent, wherein the liquid antifouling agent is formed by mixing 10 to 200 parts by weight of a mixture which is produced by mixing one or more compounds selected from the group consisting of manganese dioxide (MnO_2), methyl cellosolve, sodium chlorate (NaClO_2), sodium perchlorate (NaClO_4), sodium oxide (NaO_2), sodium chlorite (NaCIO_2), sodium hypochlorous acid (NaCIO_3), tetraethylorthosilicate (TEOS), metal salt of carbonic acid, and sodium hydroxide (NaOH) with inorganic salt which is metal salt of carbonic acid, 10 to 100 parts by weight of sodium hydroxide (NaOH) with respect to 100 parts by weight of the mixture, and 10 to 100 parts by weight of inorganic mineral with respect to 100 parts by weight of the mixture. According to the present invention, the liquid antifouling agent is very eco-friendly since cuprous oxide (Cu_2O) which is an environmental toxic material causing the contamination and destruction of an aquatic ecosystem is not added thereto, In addition, a service life of a product can be extended by enhancing protection performance of the antifouling paint through the inorganic salt and inorganic mineral added into the liquid antifouling agent.
Patent•
23 Dec 2015
TL;DR: In this paper, a method for treating oil-containing sewage by catalytic oxidation of chlorine dioxide was proposed, which mainly solved the problem of low removal rate in the prior art.
Abstract: The invention relates to a method for treating oil-containing sewage by catalytic oxidation of chlorine dioxide, and mainly solves the problem of low removal rate in the prior art. The method comprises the following steps: firstly adding sodium chlorate and hydrochloric acid into a chlorine dioxide generator, generating chlorine dioxide in situ, and then feeding the chlorine dioxide into a reactor with the oil-containing sewage in a refined oil depot and a catalyst, and treating for 20-90 minutes, wherein the catalyst is supported on an active carbon carrier taking copper oxide as an active component, the weight percentage of the metal active component is 0.5-8 percent, the adding amount of chlorine dioxide is 0.2-1.0g/L, the adding amount of the catalyst is 0.25-1.0g/L and the pH value adjusted by hydrochloric acid is 1-6. According to the technical scheme, the problem is better solved; the method can be used in treatment of the oil-containing sewage in the refined oil depot.
Patent•
29 Apr 2015
TL;DR: In this article, a method for preparing superfine iron oxide yellow through sodium chlorate oxidation is presented, which is easier in rinsing operation, low in production cost, and low in pollution; sedimentation filtering performance of the particle can be improved; the agglomeration phenomenon does not exist and monodispersion is good.
Abstract: The invention discloses a method for preparing superfine iron oxide yellow through sodium chlorate oxidation. The method comprises the following steps: under a stirring condition, dropwise adding sulfuric acid into a FeSO4 solution, adding NaClO3, enabling Fe2+ to be completely oxidized at a constant temperature, raising the temperature, and performing thermostatic reaction to enable the superfluous sodium chlorate to be completely decomposed, diluting by adding water, dropwise adding ammonia water under the stirring condition to obtain brown red colloidal ferric hydroxide, diluting by adding water, stirring, raising the temperature, adding an iron persulfate solution, then adding reduced iron powder, keeping the temperature until the pH value of the slurry is up to a conversion end point, washing until SO4 cannot be detected, adding SDBS into the slurry, keeping the temperature, adding diphenylguanidine, slurrying, filtering, washing, drying and crushing to obtain the superfine iron oxide yellow. The method for preparing superfine iron oxide yellow through sodium chlorate oxidation, disclosed by the invention, is easier in rinsing operation, low in production cost, and low in pollution; the sedimentation filtering performance of the particle can be improved; the agglomeration phenomenon does not exist and monodispersion is good.
TL;DR: In this article, the solubility diagram of the CaCl2-MgCl2−H2O system was constructed and the formation of NaCl was confirmed by chemical and physicochemical analysis methods.
Abstract: The solubility in the systems calcium chloride–magnesium chloride–water and (48.2% calcium chloride + 51.8% magnesium chloride)–sodium chlorate–water was studied by the visual–polythermal method. Their polythermal solubility diagrams were constructed. It was determined that most of the solubility diagram of the CaCl2–MgCl2–H2O system is occupied by the crystallization field of the binary salt 2MgCl2 ∙ CaCl2 ∙ 12H2O. In the solubility diagram of the system comprising calcium and magnesium chlorides, sodium chlorate, and water, there are crystallization fields of ice, MgCl2 ∙ 12H2O, NaClO3, and also NaCl forming by the interaction between phases in the system. The formation of NaCl was confirmed by chemical and physicochemical analysis methods.
Patent•
05 Aug 2015
TL;DR: In this article, the authors proposed a novel chlorine dioxide medicine system, including sodium chlorate feed line, hydrochloric acid feed line and chlorine dioxide generator, power water pump and water dart.
Abstract: The utility model provides a novel chlorine dioxide medicine system, including sodium chlorate feed line, hydrochloric acid feed line, chlorine dioxide generator, power water pump and water dart, chlorine dioxide generator and power water pump are linked together with the water dart, and the output and the input that adds the chlorination pond of water dart are linked together, sodium chlorate feed line comprises change glassware, pressurization water pump and the sodium chlorate storage tank that feeds through in proper order. The utility model discloses an of the installing additional glassware among the sodium chlorate feed line makes the sodium chlorate solid fully dissolved to improved the utilization ratio of sodium chlorate product, installed the water dart additional through the rear end at the chlorine dioxide generator, can make water source and chlorine dioxide fully dissolve in the water dart, and can avoid chlorine dioxide to take place to reveal the problem when adding the chlorination pond adding, thereby made that to add the drug effect fruit even more ideal.
Patent•
29 May 2015
TL;DR: In this article, the present application relates to methods for purifying chlorites and chlorates, in particular, methods for preparing impurity-reduced sodium chlorite or sodium chlorate.
Abstract: The present application relates to methods for purifying chlorites and chlorates. In particular, the present application relates to methods for preparing impurity-reduced sodium chlorite or sodium chlorate comprising a step of adding an antisolvent such as ethanol to aqueous solutions comprising the sodium chlorite or chlorate under conditions to obtain impurity-reduced sodium chlorite or chlorate solids and a sodium chlorite or chlorate-reduced solution. The impurity-reduced sodium chlorite or chlorate solids can optionally be recrystallized.
Patent•
30 Sep 2015
TL;DR: In this paper, a 3-15t/d large solid sodium chlorite is prepared by adding sulfuric acid, a reducing agent and a sodium chlorate solution to a chlorine dioxide reactor to react with one another to form mixed gas of chlorine dioxide and air at the temperature of 45-65 DEG C, at the pressure of 95-101 KPa under the (A) condition.
Abstract: The invention discloses a preparation technology of 3-15t/d large solid sodium chlorite. The preparation technology comprises the following steps: 1), adding sulfuric acid, a reducing agent and a sodium chlorate solution to a chlorine dioxide reactor to react with one another to form mixed gas of chlorine dioxide and air at the temperature of 45-65 DEG C, at the pressure of 95-101 KPa under the (A) condition; 2), adding caustic soda liquid and the reducing agent to an absorption system to absorb chlorine dioxide gas produced in the step (1) at the temperature of 5-35 DEG C, at the pressure of 95-101 KPa under the (A) condition to prepare 20%-40% sodium chlorite solution; 3), adding sodium chloride to the solution produced in the step (2) according to the mass ratio of sodium chloride to sodium chlorite being 0.15-0.25:1, evaporating, crystallizing, filtering and drying sodium chlorite and sodium chloride mixed solution to obtain the sodium chlorite finished product. The content of chlorine gas in tail gas is reduced to be lower than 3 mg/Nm by the absorption system by changing the addition points of caustic soda liquid and the reducing agent, so that the environmental requirements can be met. Acid is added in a ladder-like manner, the reaction intensity can be controlled under the condition that the reaction acidity is ensured, the reaction safety is ensured and the reaction efficiency is improved.
Patent•
01 May 2015
TL;DR: In this article, a method for producing an aqueous solution containing a chlorous acid for use as a disinfectant that produces achlorous acid being safe to human body and easy to be handled with less generation of chlorine dioxide as a pretreatment of food processing is presented.
Abstract: PROBLEM TO BE SOLVED: To provide a method for producing an aqueous solution containing a chlorous acid for use as a disinfectant that produces a chlorous acid being safe to human body and easy to be handled with less generation of chlorine dioxide as a disinfectant for pretreatment of food processing.SOLUTION: The method for producing an aqueous solution containing a chlorous acid for use as a disinfectant produces a chlorous acid which is safe to human body and easy to be handled with less generation of chlorine dioxide as a disinfectant for pretreatment in food processing. A chloric acid is generated by adding, to an aqueous solution of sodium chlorate, a sulfuric acid or an aqueous solution thereof in an amount and of a concentration sufficient to maintain the pH value of the aqueous solution of sodium chlorate within 2.3 to 3.4 and reacting them, and then adding, to the chloric acid, hydrogen peroxide in an amount equal to or more than the amount required for reductive reaction to produce a chlorous acid.
Patent•
25 Feb 2015
TL;DR: In this paper, a method for removing fluorescent whitening agent in broke is presented. But the method comprises the following steps: mixing sodium hypochlorite and sodium chlorate to produce a composition, wherein the mass ratio of the sodium hypoxide to sodium chlorates in the composition is 1:1 to 5:1; providing broke slurry containing a fluorescent whitener; adding the composition into the broke slurghy, and evenly mixing so as to oxidize and deactivate the fluorescent whiteners.
Abstract: The invention discloses a method for removing fluorescent whitening agent in broke. The method comprises the following steps: mixing sodium hypochlorite and sodium chlorate to produce a composition, wherein the mass ratio of sodium hypochlorite to sodium chlorate in the composition is 1:1 to 5:1; providing broke slurry containing a fluorescent whitening agent; adding the composition into the broke slurry, and evenly mixing so as to oxidize and deactivate the fluorescent whitening agent, wherein the ratio of the total weight of the sodium hypochlorite and sodium chlorate to the weight of absolutely-dry broke slurry is 500 ppm to 2500 ppm. The provided method can destroy the residual fluorescent whitening agent molecules, the harmful groups are oxidized and degraded into carbon dioxide, water, nitrates, and sulfates, the salts can be brought out of the paper machine cycle system by the off-machine water, and thus the broke slurry is health, environment-friendly, harmless, and non-toxic.
Patent•
04 Dec 2015
TL;DR: In this paper, a system and method for removing impurities to reconstitute a NaCl stream to a saturated solution salt solution and remove any impurities such as sodium bisulfate (NaHSO3), NaClO3 and sodium iodide (NaI) to improve brine quality from an electrolytic cell is disclosed.
Abstract: A system and method for removing impurities to reconstitute a NaCl stream to a saturated solution salt solution and remove any impurities such as sodium bisulfate (NaHSO3), sodium chlorate (NaClO3) and sodium iodide (NaI) to improve brine quality from an electrolytic cell is disclosed, including an evaporation system connected to the electrolytic cell, a brine treatment system connected to the evaporation system and the electrolytic cell. A waste treatment system is connected to the evaporation system. The evaporation system includes a set of evaporators that concentrates the brine. Sodium chloride is precipitated from the set of evaporators to the brine treatment system. Impurities are precipitated from the set of evaporators. The brine treatment system includes a hydrocyclone and a centrifuge that separates sodium chloride from water. The sodium chloride is mixed with water to create a concentrated and purified brine.
Patent•
24 Sep 2015
TL;DR: In this article, a granular herbicide according to the present invention comprises sodium chlorate, sodium bicarbonate, and binder, wherein the shape of 80 mass% or more of the granular herbs satisfies the relationship.
Abstract: PROBLEM TO BE SOLVED: To provide a granular herbicide which has excellent stability and can maintain herbicidal performance for a long time.SOLUTION: A granular herbicide according to the present invention comprises sodium chlorate, sodium bicarbonate, and binder, wherein the shape of 80 mass% or more of the granular herbicide satisfies the relationship: longest diameter/shortest diameter=1.0-1.5, and the granular herbicide has the particle diameter of 2 mm or more.
Journal Article•
TL;DR: In this paper, the authors used ionic liquid as a solvent instead of water to avoid evaporation of a solvent in the high-vacuum of a TEM.
Abstract: Recent years, we are focusing on nanometer scale live imaging of nucleation and dissolution of crystals in a solution using transmission electron microscope (TEM) to know the fundamental processes. Since, basically, high-vacuum environment has to be maintained in the TEM during the observation, sample is limited. To overcome the difficulties to introduce a solution into a TEM, very ingenious graphene cell or specially designed amorphous silicon nitride membrane has been established and achieved in situ observation of nucleation [e.g., 1-4]. As the results, several new perspectives such as, non-classical nucleation pathway, coalescence and oriented attachment, in the nucleation process have been reported. Against the use of liquid cell, we used ionic liquid as a solvent instead of water to avoid evaporation of a solvent in the high-vacuum of a TEM [5]. Ionic liquids have a great properties for TEM observation, such as negligible vapor pressure and high electrical conductivity. As the result, following new consequences were found after experiments of sodium chlorate nanocrystals. 1. Solubility-independent formation of polymorph. 2. Crystals do not dissolve smoothly but in a fluctuating manner. 3. New crystals form even in a totally dissolving system. 4. Ripening occurs but different from Ostwald ripening. In case of Ostwald ripening, initially presenting larger particles grow as a result of dissolution of smaller particles. However, our observation shows that ripening occurs with accompanying formation of new crystals, i.e., most of the initial crystals is replaced by new crystals. In the presentation, we will show the difference of the dissolution process between in ionic liquid and water solutions, which can be observed by a special holder having a liquid cell for TEM observation.
Patent•
29 Oct 2015
TL;DR: In this article, a heat storage material, characterized in having an inorganic salt aqueous solution, and a preservative that is endowed with preservative function and that increases the phase transition time at the melting point, was presented.
Abstract: The purpose of the present invention is to provide a heat storage material having improved heat storage performance, the heat storage material being endowed with a preservative function. A heat storage material, characterized in having an inorganic salt aqueous solution, and a preservative that is endowed with a preservative function and that increases the phase transition time at the melting point of the inorganic salt aqueous solution, the preservative being dissolved in the inorganic salt aqueous solution. The preservative contains methylchloroisothiazolinone, methylisothiazolinone, and/or sodium chlorate. The concentration of the preservative is from 0.05 wt% to 0.1 wt%. The inorganic salt aqueous solution is a potassium chloride aqueous solution, a mixed aqueous solution of potassium chloride and potassium bicarbonate, or an ammonium chloride aqueous solution.