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Electrochemical co-production method of potassium iodate and hydroiodic acid

A technology of hydroiodic acid and potassium iodate, which is applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., to achieve the effects of loose production conditions, improved current economy, and simple methods

Active Publication Date: 2020-07-10
山东博苑医药化学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved in the present invention is to provide a method for the electrochemical co-production of potassium iodate and hydroiodic acid with mild synthesis conditions and relatively loose requirements on production conditions without causing environmental pollution and safety problems.

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  • Electrochemical co-production method of potassium iodate and hydroiodic acid

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Embodiment 1

[0032] A method for electrochemical co-production of potassium iodate and hydroiodic acid, specifically comprising the following steps:

[0033] a. Compound the solvent of the anolyte; water and methanol are mixed in equal volumes to compound the solvent of the anolyte;

[0034] b. Composite anolyte; iodine and potassium hydroxide are 10:1 by iodine: the molar ratio of potassium hydroxide, and the molar concentration of iodine element is 0.5 mole per liter, completely dissolved in the solvent of anolyte, stirring Obtain the anolyte after uniformity;

[0035] c. Compound the solvent of the catholyte; water and methanol are mixed in equal volumes to compound the solvent of the catholyte;

[0036] d. Composite catholyte; elemental iodine: the molar ratio of sodium iodide is 10:1 and dissolved in the solvent of catholyte, after stirring evenly, catholyte is obtained; the concentration of elemental iodine is 5 times of iodine concentration in anolyte .

[0037] e. Electrolysis: ...

Embodiment 2

[0041] A method for electrochemical co-production of potassium iodate and hydroiodic acid, specifically comprising the following steps:

[0042] a. Compound the solvent of the anolyte; water and ethanol are mixed with equal volumes to compound the solvent of the anolyte;

[0043] b. Composite anolyte; iodine and potassium hydroxide are 5:1 by iodine: the molar ratio of potassium hydroxide, and the molar concentration of iodine element is 0.8 moles per liter, completely dissolved in the solvent of anolyte, stirring Obtain the anolyte after uniformity;

[0044] c. compound the solvent of the catholyte; water and ethanol are mixed with equal volumes to compound the solvent of the catholyte;

[0045] d. Composite catholyte; elemental iodine: the molar ratio of sodium iodide is 5:1 and dissolved in the solvent of catholyte, after stirring evenly, catholyte is obtained; the concentration of elemental iodine is 5 times of iodine concentration in anolyte .

[0046] e. Electrolysis:...

Embodiment 3

[0050] A method for electrochemical co-production of potassium iodate and hydroiodic acid, specifically comprising the following steps:

[0051] a. Solvent for compounding anolyte; water is the solvent for anolyte;

[0052] b. Composite anolyte; iodine and potassium hydroxide are 1:1 according to the molar ratio of iodine: potassium hydroxide, and the molar concentration of iodine element is 1.5 moles per liter, completely dissolved in the solvent of anolyte, stirring Obtain the anolyte after uniformity;

[0053] c. The solvent of compound catholyte; Water is the solvent of catholyte;

[0054] d. Composite catholyte; elemental iodine: the molar ratio of potassium iodide is 7:1, dissolved in the solvent of catholyte, and stirred evenly to obtain catholyte; the concentration of elemental iodine is 5 times that of iodine in the anolyte.

[0055] e. Electrolysis: The electrolytic reaction is carried out in a double-chamber electrolyzer separated by a cationic membrane. The anolyt...

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Abstract

The invention relates to the field of potassium iodate synthesis, and discloses an electrochemical co-production method of potassium iodate and hydroiodic acid. The electrochemical co-production method specifically comprises the following steps: compounding an anolyte solvent; compounding an anolyte; completely dissolving a certain amount of iodine and potassium hydroxide in a solvent of the anolyte according to a certain proportion, and uniformly stirring to obtain an anolyte; compounding a solvent of a catholyte; compounding a catholyte; dissolving iodine and iodide salt in a solvent of thecatholyte according to a certain proportion and a certain concentration, and uniformly stirring to obtain the catholyte; performing electrolysis; carrying out electrolytic reaction by adopting a double-chamber electrolytic cell separated by a cationic membrane; adding the compounded anolyte into an anode chamber, and adding the catholyte into a cathode chamber; performing crystallization; and stopping the electrolytic reaction after a certain electric quantity, cooling the anode mother liquor to a certain temperature for crystallization, and filtering to obtain potassium iodate after the anodemother liquor is crystallized. The synthesis method only comprises the steps of electrolysis, crystallization and filtration and is simple and has low requirements on production conditions without environmental pollution and avoids safety accidents.

Description

technical field [0001] The invention relates to the field of potassium iodate synthesis, in particular to a method for the electrochemical co-production of potassium iodate and hydroiodic acid. Background technique [0002] At present, the production methods of potassium iodate have been as follows: [0003] The first method is the potassium chlorate oxidation method. Potassium chlorate is oxidized in dilute nitric acid solution and refined iodine suspension to generate KH(IO 3 ) 2 , and the product is neutralized with potassium hydroxide to obtain potassium iodate. [0004] The second method is microwave-induced synthesis. Mix iodine and hydrogen peroxide, adjust the pH of the solution to 1 to 2 with nitric acid, put it in a microwave oven, and irradiate it with microwaves. After the reaction was completed, the solution was cooled to room temperature, and the pH value was adjusted to 10 with hydrogen peroxide, then cooled to crystallize, filtered, and dried to obtain p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/24C25B11/04C25B15/00
CPCC25B1/24C25B11/04C25B15/00
Inventor 翟永利张政委
Owner 山东博苑医药化学股份有限公司