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Showing papers on "Sodium chlorate published in 2014"


Journal ArticleDOI
TL;DR: In this article, the feasibility of replacing iron and tin, currently used in oxygen generators, with reactive materials, produced by reactive milling and by mechanical alloying, has been explored, and the experiments have shown that mechanically alloyed Al/Mg (1:1 mass ratio) material is a promising alternative to iron and Tin, because significantly smaller amounts of this additive are needed for a steady propagation of the combustion wave.

19 citations


Journal ArticleDOI
TL;DR: In this paper, the feasibility of using sodium oxalate in the dyeing of cotton fabrics with reactive dyes in place of inorganic salt (sodium sulfate or sodium chlorate) was studied.
Abstract: The feasibility of using sodium oxalate in the dyeing of cotton fabrics with reactive dyes in place of inorganic salt (sodium sulfate or sodium chlorate) was studied. Sodium oxalate was compared with sodium formate and sodium citrate in cotton dyeing with reactive dyes. The results showed that sodium oxalate could be a suitable exhausting agent in the reactive dyeing process. The effect of sodium oxalate to enhance a photochemical reaction is also researched by measuring the color removal of the reactive dye solution. The results revealed that color removal of the dye solution containing sodium oxalate is 5.62% higher than that containing sodium sulfate after irradiation for 30 min. The overall results suggested that sodium oxalate has the potential not only as an exhausting agent for reactive dyeing of cotton but also as an accelerant for photochemical reaction in the treatment of dyeing wastewater.

11 citations


Patent
29 Jan 2014
TL;DR: In this article, a clean production process of 6-chloro-2,4-dinitroaniline is described, where the mother solution is returned to the step 1 to serve as the hydrochloric acid solution.
Abstract: The invention discloses a clean production process of 6-chloro-2,4-dinitroaniline. The clean production process of 6-chloro-2,4-dinitroaniline comprises the following steps: 1, dispersing 2,4-dinitroaniline into hydrochloric acid solution for pulping, then introducing chlorine gas into the solution for reacting, and thus obtaining intermediate reaction solution; and 2, adding the intermediate reaction solution obtained in the step 1 into sodium chlorate solution for reacting, after the reaction is completed, processing the reaction solution to obtain the 6-chloro-2,4-dinitroaniline and mother solution, and returning the mother solution to the step 1 to serve as the hydrochloric acid solution. According to the production process, the chlorine gas and the sodium chlorate are sequentially employed as chloride agents for chlorinating in steps, so that the product purity and yield are improved and the cost of material is reduced; and the quantity of hydrochloric acid after the reaction is completed is kept stable basically, so that the mother solution is convenient to recycle for use and the pollution to environment is reduced.

8 citations


Patent
18 Jun 2014
TL;DR: In this article, an insulating coating is obtained by mixing evenly a raw material mixture; the mixture contains a dihydric phosphate, an oxidizing agent, a silane coupling agent, an acid, a water soluble silicate and water; the oxidising agent is at least one of sodium perchlorate, potassium permanganate, hydrogen peroxide, sodium chlorate, sodium nitrite, zinc nitrate, sodium persulfate, Sodium bromate, ammonium peroxydisulfate and cobalt nitrate.
Abstract: The invention provides an insulating coating. The insulating coating is obtained by mixing evenly a raw material mixture; the raw material mixture contains a dihydric phosphate, an oxidizing agent, a silane coupling agent, an acid, a water soluble silicate and water; the oxidizing agent is at least one of sodium perchlorate, potassium permanganate, hydrogen peroxide, sodium chlorate, sodium nitrite, zinc nitrate, sodium persulfate, sodium bromate, ammonium peroxydisulfate, sodium molybdate and cobalt nitrate. The invention also provides an electrical steel material. The invention also provides a preparation method of the electrical steel material. The invention further provides the electrical steel material obtained according to the preparation method of the electrical steel material. The insulating coating after curing has good heat resistance, insulativity, adhesiveness, corrosion resistance, punching and shearing processability and other properties.

6 citations


Patent
27 Aug 2014
TL;DR: In this paper, a pipeline continuous reaction was used for 2,4-binitro-6-chloroaniline preparation under heat insulation condition by adopting a pipeline reactor, the process from contact of the materials to reaction is finished instantly without producing polychlorinated compounds and chlorine dioxide, the potential safety hazard is avoided, the product quality and yield are greatly improved, and the HPLC purity is not less than 98%.
Abstract: The invention relates to the chemical industry field, in particular relates to a preparation method of 2,4-binitro-6-chloroaniline The preparation method of the 2,4-binitro-6-chloroaniline is carried out under heat insulation condition by adopting a pipeline reactor, the process from contact of the materials to reaction is finished instantly without producing polychlorinated compounds and chlorine dioxide, the potential safety hazard is avoided, the product quality and yield are greatly improved, the HPLC (high performance liquid chromatography) purity is not less than 98%, and the 2,4-dinitraniline residue is not more than 1%; the final product does not come into contact with oxidized sodium chlorate and chlorine due to adoption of the pipeline continuous reaction, no oxidation product is produced in the system, the product quality is improved, and the infinite recycling of the master liquid can be realized; the mother liquid is filtered through a film to recycle sodium chloride, and the infinite recycling of the mother liquid is realized after the mother liquid adsorbs hydrogen chloride, and the sodium chlorate approaches to a theoretical consumption

6 citations



Journal ArticleDOI
TL;DR: In this paper, the effects of partial dissolution and refaceting on growth rates of sodium chlorate and potassium dihydrogen phosphate (KDP) crystals were presented, and the growth rate dispersion (GRD) was described by multiple normal distributions.
Abstract: Effects of partial dissolution and refaceting on growth rates of sodium chlorate and potassium dihydrogen phosphate (KDP) crystals are presented. Under the same external conditions, crystals of sodium chlorate and KDP exhibit growth rate dispersion (GRD), prior to dissolution and after refaceting. These GRDs were described by multiple normal distributions. Dissolution and refaceting reduce the GRD. A number of growth rates pertained to higher order maxima decreases, whereas a number of those pertained to lower order increases, that is, crystals continue to grow at leveled rates. Maxima positions are related to the activity of dominant dislocation groups emerging on the crystal surface. Many nongrowing {100} faces of sodium chlorate and KDP crystals, as well as the nongrowing roofs of KDP crystals, were also noticed before dissolution and after refaceting, which is related to a lattice strain effect.

5 citations


Journal ArticleDOI
TL;DR: In this paper, the oxidized corn starch was prepared by using chlorine dioxide as novel oxidant, which was characterized by X-ray diffraction, scanning electron microscope (SEM), and transmission electron microscopy (TEM).
Abstract: In the present work, the oxidized corn starch was prepared by using chlorine dioxide as novel oxidant. It was characterized by X-ray diffraction, scanning electron microscope (SEM), and transmission electron microscope (TEM). The main factors that affect the oxidation process were studied, and the oxidation degree of oxidized starch was determined by the carboxyl content and viscosity of the product. The results show that carboxyl groups are introduced into the starch chains successfully, and the oxidation reaction mainly carries out at the amorphous area. Compared with native starch, the light transmittance and anti-retrogradation of oxidized starch increase, whereas the viscosity reduces. The best oxidized starch can be obtained at the sodium chlorate dosage of 3%, hydrochloric acid 4%, and sulfuric acid 3% (all based on the initial starch weight), while the oxidation reaction is conducted at 50°C for 5 h.

5 citations


Patent
24 Sep 2014
TL;DR: In this paper, a cleaning fluid of an analyzer, which comprises the following components in one liter of the cleaning fluid, 2.0-10.0g of sodium chloride, 3.5-1.2g of compound enzyme stabilizing agent, 0.17-0.5g of phosphate buffer for adjusting pH value, and balance of water, was revealed.
Abstract: The invention discloses a cleaning fluid of an analyzer, which comprises the following components in one liter of the cleaning fluid, 2.0-10.0g of sodium chloride, 3.0-6.0g of anionic surfactant, 16.0-23.0g of soybean protease, 0.5-1.2g of compound enzyme stabilizing agent, 0.17-0.2g of sodium chlorate, 3.0-6.0g of sodium sulfate, 8.0-9.5g of phosphate buffer for adjusting pH value, and balance of water, wherein addition of sodium chloride and the anionic surfactant are complementary, sum of addition is less than or equal to 9.0g. The cleaning fluid does not contain cyanide without toxicity, work environment of operation staff and production staff can be effectively improved, damage of poison to body health is reduced, physicochemical property is stable, and the agent can be stored at room temperature for more than one year. Accuracy of the detection result can be ensured, no corrosion is generated to an automatic biochemistry analyzer, and the cleaning fluid has no pollution to environment.

4 citations


Patent
31 Dec 2014
TL;DR: In this paper, the preparation method of an oil injection pump plunger surface phosphating liquid is described, which comprises the steps: (1) taking an appropriate amount of water to blend zinc oxide into a paste; (2) adding phosphoric acid and nitric acid to obtain a mixed solution, adding the pasty zinc oxide of the step (1), and then putting into a reaction kettle; and (3) successively adding nickel nitrate, ferric nitrate and copper nitrate into the reaction kettle by a way of adding the next component after the former component
Abstract: The invention discloses a preparation method of an oil injection pump plunger surface phosphating liquid. The preparation method of the phosphating liquid comprises the steps: (1) taking an appropriate amount of water to blend zinc oxide into a paste; (2) taking an appropriate amount of water again, adding phosphoric acid and nitric acid to obtain a mixed solution, adding the pasty zinc oxide of the step (1), and then putting into a reaction kettle; and (3) successively adding nickel nitrate, ferric nitrate, copper nitrate, sodium citrate, tartaric acid, sodium fluoroborate, sodium chlorate, hydrogen peroxide and sodium carbonate into the reaction kettle by a way of adding the next component after the former component is dissolved, and after all the components are dissolved, adjusting the pH to 2-3.

4 citations


Patent
06 Aug 2014
TL;DR: In this article, a synthesis method of acidic iron sulfate was proposed, which can solve technical problems of complex process and slow reaction speed in the prior art, and can solve technology simplification and reaction speed acceleration.
Abstract: The invention provides a synthesis method of acidic iron sulfate, and can solve technical problems of complex process and slow reaction speed in the prior art. The method comprises the following steps: 1, adding water to 17-32.9mass% of ferrous sulfate heptahydrate or ferrous sulfate monohydrate by Fe , and uniformly stirring for above 2min to form a slurry liquid; 2, adding 40-98mass% of a sulfuric acid or waste industrial sulfuric acid solution, and uniformly stirring; 3, adding 98.5-99.9mass% of a sodium chlorate or potassium chlorate solid; 4, controlling the reaction temperature at 60-80DEG C, the reaction time at 20-40min, and a ratio of Fe to sulfuric acid to ClO to water at (1-1.2):(1.5-1.8):(0.2-0.3):(6.3-9.2); and 5, obtaining acidic iron sulfate. The method adopting the above technical scheme can realize technology simplification and reaction speed acceleration.

Patent
10 Dec 2014
TL;DR: In this paper, a novel chlorine dioxide generator is presented, which comprises a reactor, a controller, a control panel, a hydrochloric acid stock tank, a sodium chlorate stock tank and a water injector.
Abstract: The utility model discloses a novel chlorine dioxide generator which comprises a reactor, a controller, a control panel, a hydrochloric acid stock tank, a sodium chlorate stock tank, a hydrochloric acid metering pump, a sodium chlorate metering pump and a water injector, wherein a hydrochloric acid feeding port, a sodium chlorate feeding port, a water inlet, a gas inlet, a chlorine dioxide outlet and a raffinate draining port are formed in the reactor; the hydrochloric acid stock tank is communicated with the hydrochloric acid feeding port through a hydrochloric acid feeding pipe; the sodium chlorate stock tank is communicated with the sodium chlorate feeding port through a sodium chlorate feeding pipe; the hydrochloric acid metering pump and the sodium chlorate metering pump are mounted on the hydrochloric acid feeding pipe and the sodium chlorate feeding pipe respectively; the chlorine dioxide outlet is connected with the water injector through a chlorine dioxide draining pipe; the water injector is further connected with a high water pressure pipe, a pressure gauge and a pressure regulating valve I are arranged on the high water pressure pipe, and a pressure regulating valve II is arranged on the chlorine dioxide draining pipe; and the hydrochloric acid metering pump, the sodium chlorate metering pump and the control panel are connected with the controller. The novel chlorine dioxide generator is simple in structure, practical and environment-friendly.

Patent
17 Dec 2014
TL;DR: In this paper, a method for recovering silver from wet zinc smelting waste slag is described, which is characterized by comprising the following steps: the zinc slag was roasted for 0.5-2 hours at the temperature of 600-700 DEG C to obtain roasted sand; by the volume/mass ratio is 3: (1-7): 1, sulfuric acid solution of 49-98 g/L is added in the roasted sand, is mixed at the room temperature to 60 DEGC, and is filtered to obtain acid leaching slag and
Abstract: The invention discloses a method for recovering silver from wet zinc smelting waste slag. The method is characterized by comprising the following steps: the zinc smelting waste slag is roasted for 0.5-2 hours at the temperature of 600-700 DEG C to obtain roasted sand; by the volume/mass ratio is 3: (1-7): 1, sulfuric acid solution of 49-98 g/L is added in the roasted sand, is mixed at the room temperature to 60 DEG C, and is filtered to obtain acid leaching slag and acid leaching solution; and by the volume/mass ratio is 3: (1-7): 1, sodium chloride solution of 200-390 g/L is added in the acid leaching slag, and sodium chlorate or potassium chlorate being 2-8 wt% of the acid leaching slag is dripped for heating up to the temperature of 70-95 DEG C and leaching for 2-5 hours, and is filtered with the heat to obtain chlorine salt leaching solution and chlorine salt leaching slag. According to a silver leaching system of sodium chloride-sulfuric acid-sodium chlorate or potassium chlorate, the leaching rate of the silver reaches above 90%, and the leaching rate of lead reaches above 90%. The method is suitable for silver-contained wet zinc smelting waste slag with the content of calcium sulfate higher than 5%.

Journal ArticleDOI
TL;DR: In this article, the nickel sulphate doped mixed sodium chlorate and sodium bromate mixed crystal is grown by slow evaporation solution growth technique at room temperature, and the grown crystal was subjected to XRD, UV, FTIR, SEM, TG/DTA, Microhardness and SHG analysis.
Abstract: The nickel sulphate doped mixed sodium chlorate and sodium bromate mixed crystal is grown by slow evaporation solution growth technique at room temperature. The grown crystal was subjected to XRD, UV, FTIR, SEM, TG/DTA, Microhardness and SHG analysis. Characterization studies reveal that the grown crystal forms cubic system with space group P213. The crystal possesses less absorption in the UV-Visible region. The presence of various functional groups has been identified from FTIR studies with their vibrating frequencies. The second harmonic generation efficiency was also determined. The mechanical property was studied by microhardness.

Patent
10 Dec 2014
TL;DR: In this article, a high-efficiency corrosion inhibitor is proposed, which is prepared from the following raw materials in parts by weight: 10-15 parts of calcium gluconate, 3.2-3.8 parts of polyphosphate, 2.5-6 parts of benzotriazole, 0.6-1.3 parts of monoethanolamine, 1.4-6.
Abstract: The invention provides a high-efficiency corrosion inhibitor. The high-efficiency corrosion inhibitor is prepared from the following raw materials in parts by weight: 10-15 parts of calcium gluconate, 3.5-6 parts of benzodiazole, 1.2-3.8 parts of polyphosphate, 2-5 parts of sodium dodecyl sulfate, 2.5-6 parts of benzotriazole, 0.6-1.3 parts of monoethanolamine, 1.4-6.5 parts of sodium disilicate, 2.3-5.8 parts of sodium carbonate, 1.6-3.8 parts of cocoanut oil diethanolamide, 0.6-1.4 parts of benzyl alcohol and 0.5-0.9 part of sodium chlorate. The high-efficiency corrosion inhibitor has the beneficial effects that the corrosion inhibitor can form a dense and solid film on the surfaces of metals, so that metal corrosion can be delayed and equipment losses can be reduced.

Journal Article
TL;DR: Nickel and cobalt were leached from waste nickel-base alloy scrap by atmospheric acid leaching with sodium chlorate as oxidant, and tungsten, molybdenum and tantalum were enriched in residue as discussed by the authors.
Abstract: Nickel and cobalt were leached from waste nickel-base alloy scrap by atmospheric acid leaching with sodium chlorate as oxidant,and tungsten,molybdenum and tantalum were enriched in residue.The results show that nickel and cobalt leaching rates are both 99% above under the optimum leaching conditions including particle size of waste alloy scrap of 0.075~0.100 mm,concentration of sulfuric acid of4.5mol/L,ratio of liquid to solid of 8∶1,dosage of sodium chlorate of 2.0g(2% of waste alloy),leaching time of 2.5h,and temperature of(85±3)℃.

Patent
31 Dec 2014
TL;DR: In this paper, a normal temperature multifunctional phosphating solution for highway guardrails is presented, which consists of 135-145 g/L of 85% phosphoric acid, 35-45 g/l of zinc oxide, 30-40 g /L of magnesium oxide, 20-24 g / l of calcium hypophosphite, 8-12 g /l of triethanolamine, 3-5 g /lp ion, 6.5-7.5 g/ l of ammonium molybdate, 5-7 g /pere
Abstract: The present invention discloses a normal temperature multifunctional phosphating solution for highway guardrails. The normal temperature multifunctional phosphating solution comprises 135-145 g/L of 85% phosphoric acid, 35-45 g/L of zinc oxide, 30-40 g/L of magnesium oxide, 20-24 g/L of calcium hypophosphite, 8-12 g/L of triethanolamine, 3-5 g/L of sodium nitrite, 5-7 g/L of sodium fluoride, 2-4 g/L of sodium chlorate, 2.5-3.5 g/L of citric acid, 1.5-2.5 g/L of ammonium molybdate, 5-7 g/L of peregal, 6.5-7.5 g/L of OP-10, and the balance of water.

Journal ArticleDOI
TL;DR: In this paper, the nanofiltration membrane and freezing crystallization integrated technology was presented to treat crystallization mother liquor, and the results showed that Na2Cr2O7 concentration was lower than 0.05 g/L, Na2SO4 concentration was less than 1 g/l, and it could be recycled for brine refining stage avoiding the chromium pollution caused by subsequent treatment.
Abstract: In the process of sodium chlorate electrolysis production, chemical precipitation is often used to remove the sulfate radical in the crystallization mother liquor which leads to the dichromate deposit to salt sludge together with sulfate, and finally causes chromium pollution. The nanofiltration membrane and freezing crystallization integrated technology was presented to treat crystallization mother liquor. The research conducted in this work shows that, Na2Cr2O7 concentration was lower than 0.05 g/L, Na2SO4 concentration was lower than 1 g/L in the nanofiltration permeate and it could be recycled for brine refining stage avoiding the chromium pollution caused by subsequent treatment. The content of Na2Cr2O7 in salt sludge was less than 8.5 ppm below the 10 ppm discharge standards. Then, the nanofiltration concentrate was frozen, Na2SO4 crystallized and precipitated. The supernatant mainly containing sodium dichromate could recycle to the electrolytic system. This method not only could recycle sodium dichromate, avoiding chrome sludge generated, but also could remove sulfate radicals. Key words: Sodium chlorate, chrome sludge, nanofiltration, freezing crystallization, sodium dichromate recycling, sodium sulfate.

Journal ArticleDOI
TL;DR: The results suggest that the low chlorate doses used here were suboptimal for the control of coliforms in the gastrointestinal tract of ewes.
Abstract: The objective of this study was to evaluate the efficacy of oral sodium chlorate administration on reducing total coliform populations in ewes. A 30% sodium chlorate product or a sodium chloride placebo was administered to twelve lactating Dorper X Blackbelly or Pelibuey crossbred ewes averaging 65 kg body weight. The ewes were adapted to diet and management. Ewes were randomly assigned (4/treatment) to one of three treatments which were administered twice daily by oral gavage for five consecutive days: a control (TC) consisting of 3 g sodium chloride/animal/d, a T3 treatment consisting of 1.8 g of sodium chlorate/animal/d, and a T9 treatment consisting of 5.4 g sodium chlorate/animal/d; the latter was intended to approximate a lowest known effective dose. Ruminal samples collected by stomach tube and freshly voided fecal samples were collected daily beginning 3 days before treatment initiation and for 6 days thereafter. Contents were cultured quantitatively to enumerate total coliforms. There wer...

Patent
30 Apr 2014
TL;DR: In this paper, a closed circulation clean production technique in a sodium chlorate production process is proposed in the method, and the clean SA production without chromium slag emission is realized by using the method.
Abstract: The invention discloses a sodium dichromate closed circulation clean production method for preparing sodium chlorate. A sodium dichromate closed circulation clean production technique in a sodium chlorate production process is proposed in the method, and the clean sodium chlorate production without chromium slag emission is realized by using the method. A ceramic membrane filtering technology is adopted, and a clean production process comprising the steps of salt dissolving, double-alkaline pretreatment, ceramic membrane, barium chloride process pretreatment, barium sulfate recovery, ceramic membrane, electrolysis, crystallization and electrolysis is proposed, so that the concentration of NaCl entering saline water in an electrolytic tank is larger than or equal to 300g/L, the contents of Ca , Mg , SO4 and Ba meet an electrolysis requirement, the content of SO4 in a crystallized mother solution is lower than 1mg/L, the electrolysis can be directly carried out without treating the mother solution, so that chromium slag is prevented from being generated. The sodium dichromate closed circulation clean production method in a sodium chlorate production process, disclosed by the invention, has the advantages of discharging no chromic salt mud, saving the precious chromium resource, solving the discharging problem of hexavalent chromium generated by sodium chlorate plants and generating a certain economic benefit.


Patent
31 Dec 2014
TL;DR: A steel plate low-temperature environmental protection phosphatization liquid is described in this article, which comprises the following steps: 15-19g/L of 85% of phosphoric acid, 4-6g/l of 68% of PHYCARP, 17-19 g/L zinc oxide, zinc dihydrogen phosphate, 5-9g /L of ferric nitrate, 1-2g /l of calcium nitrate (CNO), 3-5g/ l of sodium citrate, 3-7g / l of tartrate
Abstract: The invention discloses a steel plate low-temperature environmental-protection phosphatization liquid, which comprises the following steps: 15-19g/L of 85% of phosphoric acid, 4-6g/L of 68% of phosphoric acid, 17-19g/L of zinc oxide, 4-6g/L of zinc dihydrogen phosphate, 5-9g/L of ferric nitrate, 1-2g/L of calcium nitrate, 3-5g/L of sodium citrate, 5-7g/L of tartrate, 1-2g/L of polyethylene glycol, 0.5-1.5g/L of sodium chlorate, 2-4g/L of nitrobenzene sodium xanthate, 3-4g/L of sodium carbonate, 1.5-2.5ml/L of hydrogen peroxide and 3-5mg/L of thiourea and the balance of water.

Patent
26 Nov 2014
TL;DR: In this paper, a color indicator based on the fact that methyl orange changes color according to the content of sodium chlorate in acidized industrial alkali liquor is presented, and the determination can be performed with a conventional instrument without the need of special preparation.
Abstract: The invention discloses a method for determining the content of sodium chlorate in industrial alkali liquor, in particular to a color indicator method based on the fact that methyl orange changes color according to the content of sodium chlorate in acidized industrial alkali liquor. The method utilizes the principle that methyl orange is orange red in acidized industrial alkali liquor, and is oxidized to fade if a strong oxidant, sodium chlorate, exists in industrial alkali liquor. The color reaction is intuitive, and the determination is easy and convenient. The determination can be performed with a conventional instrument and without the need of special preparation, and the method is worth of generalization.

Journal ArticleDOI
TL;DR: In this paper, a new chlorate-based chlorine dioxide generation process was developed by using waste molasses as reductant in the presence of sulfuric acid catalyst, and the best conversion rate and purity of chlorine dioxide was 73.8% and 95.1%, respectively.
Abstract: A new chlorate-based chlorine dioxide generation process was developed by using waste molasses as reductant in the presence of sulfuric acid catalyst. The optimum technological condition was determined as 80 oC, 50% sulfuric acid, molasses and sodium chlorite weight ratio of 1:4. The best conversion rate and purity of chlorine dioxide was 73.8% and 95.1%, respectively. Chlorite was found in the reacting mixtures, and major reactions of in process were inferred. The results obtained provides a new way for waste molasses comprehensive utilization and chlorine dioxide generation.

Patent
10 Dec 2014
TL;DR: In this paper, an adhesive for paper products and a production method of denaturated starch is described. But the method is not suitable for continuous production and the product is extremely unstable, and the defects that the 'dry process' cannot carry out continuous production of the product are overcome.
Abstract: The invention provides denaturated starch of an adhesive for paper products and a production method of the denaturated starch. The denaturated starch comprises the components: starch, hydrochloric acid, hydrogen peroxide, potassium chlorate or sodium chlorate and an alkaline PH value modifier. The production method comprises the following steps: (1) adding the starch to a reaction container with the temperature of 50-70 DEG C, and adding corresponding proportions of hydrochloric acid, hydrogen peroxide, potassium chlorate or sodium chlorate; (2) enabling the materials to react for 60-120 minutes, measuring the viscosity of the materials, controlling the ratio of the materials to water in viscosity to be (1 to 3), (1 to 5) or (1 to 7), and if the viscosity which is measured by sampling for the first time is greater than the required viscosity, continuing to react; and (3) after the viscosity meets the requirements, immediately adding the alkaline PH value modifier to neutralize, and controlling the PH value of the product to be 5-8. According to the production method, a traditional wet process production process is changed by adopting dry process and semi-dry process production technologies, the defects that the 'dry process' cannot carry out continuous production and the product is extremely unstable are overcome, and the production process provided by the invention is simple in steps, easy to operate, and excellent in continuous production stability.

Patent
09 Apr 2014
TL;DR: In this paper, a polyacrylonitrile-based carbon fiber raw liquid was used to solve the problems of high equipment investment and large public engineering consumption in prior art.
Abstract: The invention relates to a preparation method of a polyacrylonitrile-based carbon fiber raw liquid, which solves the problems of high equipment investment and large public engineering consumption in prior art. The method comprises the following steps: a)polyacrylonitrile powder is dissolved by a solvent I to slurry under the operation temperature T1 at 15-95 DEG C; wherein the solvent I is selected from at least one of potassium rhodanide, sodium sulfocyanate, sodium hyposulfite, sodium chlorate or sodium sulfate; and b)a solvent II and the slurry are contacted to prepare a polyacrylonitrile-based carbon fiber raw liquid under the operation temperature T2 at 30-99 DEG C; wherein the solvent II is at least one selected from potassium rhodanide, sodium sulfocyanate, sodium hyposulfite, sodium chlorate or sodium sulfate. The preparation method better solves the problems, and can be used in the industrial production for preparing the polyacrylonitrile-based carbon fiber raw liquid.