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Recycling method of waste salt in potassium perchlorate production process

A potassium perchlorate, production process technology, applied in the electrolysis process, electrolysis components and other directions, can solve the problems of destroying the cell, crystal short circuit, etc., to achieve the effect of recycling

Active Publication Date: 2011-01-12
茂县鑫盐化工有限公司
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Problems solved by technology

[0005] In addition, when the concentration of potassium ions in the waste salt is high (greater than 5 g / L), it often causes a crystallization short circuit when used in electrolysis, destroying the battery

Method used

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  • Recycling method of waste salt in potassium perchlorate production process
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  • Recycling method of waste salt in potassium perchlorate production process

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Embodiment 1

[0054] Embodiment 1 sodium chlorate, potassium perchlorate closed loop production

[0055] The inventors of the present invention started from improving the corrosion resistance of metal anodes and effectively reducing the corrosion of hydrofluoric acid, effectively reducing the problem of hydrofluoric acid corrosion and improving the corrosion resistance of metal anodes. A 15,000-ton / year sodium chlorate and potassium perchlorate closed-circuit production unit has been built, and no obvious technical defects have been found after one year of use. See the specific process route figure 2 . Sodium chloride (salt) is dissolved in hot water to obtain brine, and after refining, it enters the electrolysis process to obtain sodium chlorate and hydrogen, and is discharged after the gas treatment process. Add urea to the solution containing sodium chlorate to react, remove sodium hypochlorite, crystallize to obtain solid sodium chlorate, dissolve solid sodium chlorate, filter and re...

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Abstract

The invention relates to a recycling method of waste salt in a potassium perchlorate production process, belonging to the technical field of potassium perchlorate production. The invention aims to solve the technical problem that the corrosion problem of the waste salt recycling on a metal anode electrolytic bath in the potassium perchlorate production is overcome to recycle the waste salt in thepotassium perchlorate production process. In the invention, calcium chloride and a sinking agent are added to a waste salt solution obtained in the potassium perchlorate production process and a microporus filter removes the sediments of calcium fluoride to make the concentration of fluorinions in the waste salt solution lower than 0.1g / L. The invention can be used for preparing sodium chlorate by electrolysis and recycling the waste salt, overcomes the corrosion problem of the metal anode electrolytic bath and realizes co-production closed cycle production.

Description

technical field [0001] The invention relates to a method for recovering waste salt in potassium perchlorate production, and belongs to the technical field of potassium perchlorate production. Background technique [0002] Potassium perchlorate is mainly used in the production of firecrackers and fireworks. my country is a big producer of traditional firecrackers and fireworks, so the production of potassium perchlorate is relatively large. [0003] Potassium perchlorate is refined by brine (sodium chloride) and then electrolyzed to obtain sodium chlorate. Sodium chlorate is dissolved, filtered, and electrolyzed to obtain sodium perchlorate. Sodium perchlorate and KCl undergo double decomposition to obtain potassium perchlorate and NaCl. In the production process, a certain amount of sodium fluoride needs to be added in the process of electrolyzing sodium chlorate into sodium perchlorate to improve the current efficiency, but the brine of the metathesis material in the subse...

Claims

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Application Information

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IPC IPC(8): C25B15/08C25B1/26
Inventor 刘小章杨帆王世华
Owner 茂县鑫盐化工有限公司
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