Topic
Sodium chlorate
About: Sodium chlorate is a research topic. Over the lifetime, 791 publications have been published within this topic receiving 6844 citations.
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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.
Patent•
20 Sep 2019
TL;DR: In this paper, the authors present a method for preparing ruthenium trichloride (RuO4) from rutheium-containing waste, which has the characteristics of fast reaction rate, high conversion rate, good safety, and low energy consumption.
Abstract: The invention relates to a method for preparing ruthenium trichloride from ruthenium-containing waste. The method is characterized by comprising the following steps: (1) roasting: enabling the ruthenium-containing waste to be roasted, wherein roasting temperature is 200-800 DEG C, and roasting time is 4-8h; (2) preparation of RuO4: enabling the roasted ruthenium-containing waste to be added into a reaction kettle, then adding sodium chlorate, liquid bromine and water, stirring to react in a condition of 60-100 DEG C, and reacting for 1.5-5h, wherein the proportion of the ruthenium-containing quantity of the ruthenium-containing waste to the sodium chlorate to the liquid bromine to the water is 100 to (150-550) to (2-6) to (300-800) in parts by ewight; (3) preparation of an H2RuCl5 ;absorbing RuO4 generated via reaction in the step (2) by adopting hydrochloric acid at normal temperature to obtain the H2RuCl5 solution; and (4): drying: enabling the generated H2RuCl5 solution to be heated and concentrated to crystallize, and then carrying out infrared drying to obtain a hydrated ruthenium trichloride crystal. The method has the characteristics of fast reaction rate, high conversion rate, good safety, low energy consumption and the like.
Patent•
28 Apr 2020
TL;DR: In this paper, a sodium hypochlorite disinfectant for drinking water and a preparation method for its preparation was described. But the main materials and auxiliary materials were not specified.
Abstract: The invention belongs to the field of disinfectants, in particular relates to a sodium hypochlorite disinfectant for drinking water and a preparation method thereof The sodium hypochlorite disinfectant comprises main materials and auxiliary materials, wherein the main materials comprise water, a sodium hydroxide solution and liquid chlorine; wherein the auxiliary materials comprise chlorine, a sodium carbonate solution and a calcium hydroxide solution, and the main materials and the auxiliary materials comprise the following components in parts by mass: 80-120 parts of the water, 6-10 parts of the sodium hydroxide solution, 2-4 parts of the liquid chlorine, 1-3 parts of the chlorine, 2-5 parts of the sodium carbonate solution and 3-6 parts of the calcium hydroxide solution The liquid chlorine and the chlorine are added for preparation; by slowly adding the liquid chlorine and the chlorine under a low-temperature condition, sodium chlorate can be obtained, the quality of the sodium chlorate is guaranteed, the condition that sodium hypochlorite is possibly decomposed is avoided at a low temperature, the reaction can be accelerated under the condition that the air pressure in a sealed tank is low, meanwhile, stirring and mixing are conducted uninterruptedly, and the maximum sodium hypochlorite can be obtained
Patent•
30 Nov 2018
TL;DR: In this paper, a flocculating agent is prepared from ferrous sulfate, sodium chlorate, modified magnetic powder and concentrated sulfuric acid, which can react to produce a large amount of Fe with adsorption and magnetic coagulation.
Abstract: The invention discloses a flocculating agent. The flocculating agent is prepared from ferrous sulfate, sodium chlorate, modified magnetic powder and concentrated sulfuric acid. The modified magnetic powder is prepared through weighing concentrated sulfuric acid, continuously grinding and uniformly mixing the concentrated sulfuric acid and common magnetic powder, weighing sodium chlorate and carrying out uniform mixing, wherein the concentrated sulfuric acid has a concentration of 98%. The invention provides a preparation method of the flocculating agent. The preparation method comprises: adding ferrous sulfate, carrying out uniform mixing, and alternately adding concentrated sulfuric acid and sodium chlorate into the mixture in batch along with continuous stirring to obtain the solid flocculant powder. The flocculating agent can react to produce a large amount of Fe with adsorption flocculation and magnetic coagulation and accelerate the sedimentation flocculation efficiency. The modified magnetic powder replaces ferrous sulfate, the whole preparation process can be completed in a relatively humid environment without water dissolution, the final drying process is avoided, raw material and production costs are reduced and the production efficiency of the flocculating agent is improved.
Patent•
05 Apr 2019
TL;DR: In this article, a testing method of the content of sodium chlorate in a sodium hydroxide solution is presented, in which the standard curve can be drawn well, the testing result is stable, and the accuracy degree is high.
Abstract: The invention relates to a testing method of the content of sodium chlorate in a sodium hydroxide solution, and belongs to the field of chemical analysis. The problems that as for an existing testingmethod, a qualified standard curve cannot be drawn, and the accuracy degree of the testing result is low are solved. According to the technical scheme, the testing method of the content of the sodiumchlorate in the sodium hydroxide solution is provided and comprises the following steps: a, a sodium hydroxide solution sample is taken to be added with a color developing agent, namely o-tolicline; b, hydrochloric acid is dropwise added at 0-10 DEG C till the pH is equal to 6-8, then hydrochloric acid is quickly added till the concentration of hydrogen ions in the solution is greater than or equal to 6 mol/l, during quick adding, the temperature is kept at 20 DEG C or below, the solution is evenly shaken and subjected to still standing for color developing, and the absorbancy is tested; and c, according to the absorbancy testing result, the content of the sodium chlorate in the sodium hydroxide solution sample is calculated. According to the testing method, the standard curve can be drawnwell, the testing result is stable, and the accuracy degree is high.