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Method for preparing perchlorate by electrolysis of chlorate

A technology of chlorate electrolysis and perchlorate, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of high product cost, low current efficiency, and non-continuous operation, so as to reduce the difficulty of production operation and reduce the number of operation control points , The effect of improving the current efficiency

Inactive Publication Date: 2004-06-30
吴建国 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrolysis methods include single-cell continuous electrolysis and multi-cell cycle electrolysis. Single-cell continuous electrolysis has low chlorate concentration and low current efficiency in the electrolytic cell, and each electrolytic cell is controlled separately, so there are many control points and multi-cell cycle. Electrolysis is intermittent production and cannot be carried out continuously. The production cycle is long, and the general production cycle is more than 240 hours.
A common problem that these two kinds of methods exist is that the current efficiency is low, the power consumption is high, and the product cost is high. This is because the conversion rate of sodium chlorate in the electrolysis process must meet certain requirements, usually more than 85%, and generally controlled at 95%. %, but because the efficiency of the current decreases with the concentration of sodium chlorate, the current efficiency is less than 40% in the process of increasing the conversion rate from 85% to 95%, so the general total current efficiency is only about 60%, resulting in power consumption High, this point was reported in "Inorganic Salt Industry 2001 Issue 1"

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] The saturated solution of raw material sodium chlorate is 15 tons, the pH value is controlled to be 6, and the electrolysis temperature is controlled to be 55°C, the ceramic-based lead dioxide electrode is used as the anode, the stainless steel electrode is used as the cathode, and six electrolytic cells are connected in series to form a Group, the electrolyzers are arranged in steps according to the potential difference, the tank pressure is 5 volts, the electrolyte flows from the high position tank to the highest position electrolyzer, overflows into the next position electrolyzer to continue electrolysis, and then overflows into the next electrolyzer, The conversion rate of chlorate at the end of electrolysis is controlled at 70%, and the electrolysis time is 30 hours. The electrolysis completed solution is reacted with potassium chlorate to produce potassium perchlorate, and the mother liquor is returned to the electrolysis process for further electrolysis after treat...

Embodiment 2

[0009] The saturated solution of raw material sodium chlorate is 12 tons, the pH value is controlled to be 7, and the electrolysis temperature is controlled to be 65°C, the ceramic-based lead dioxide electrode is used as the anode, the stainless steel electrode is used as the cathode, and five electrolytic cells are connected to form a One group, the electrolyzers are arranged in steps according to the potential difference, the tank pressure is 4 volts, the electrolyte flows from the high position tank to the highest position electrolyzer, overflows into the next position electrolyzer to continue electrolysis, and then overflows into the next electrolyzer , control the conversion rate of chlorate at the end of the electrolysis at 72%, and the electrolysis time is 25 hours. The electrolysis complete solution is reacted with potassium chlorate to produce potassium perchlorate, and the mother liquor is returned to the electrolysis process for electrolysis after treatment. In this ...

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Abstract

The invention discloses a method to prepare perchlorate by electrolyzation. Make the electrobaths is greater than or equal to 3 in series become a group and arrange according to graded position difference, make the electrolyte flow from the high-position electrobath to the highest-position one, after electrolyzed, overflow into next one for electrolyzation, then overflow into next one, and electrolyzed in the final one to obtain the finished electrolyte, and control the conversion within 65-85%, to use the finished electrolyte to produce perchlorate product. It improves the current efficiency by above 15%, each ton of perchlorate can reduce electric consumption by 800kw.h, and the output of the perchlorate can be raised by 15% above.

Description

Technical field: [0001] The invention relates to a method for preparing perchlorate by electrolysis of chlorate. Background technique: [0002] The existing method for preparing perchlorate by chlorate electrolysis includes in a saturated solution of chlorate, controlling the pH value to 4-8, and controlling the electrolysis temperature to be below 80°C, using a titanium-based lead dioxide electrode or The ceramic-based lead dioxide electrode or platinum electrode is used as the anode, and the stainless steel electrode is used as the cathode for electrolysis, and the electrolytic solution obtained through electrolysis is used to produce perchlorate products. The electrolysis methods include single-cell continuous electrolysis and multi-cell cycle electrolysis. Single-cell continuous electrolysis has low chlorate concentration and low current efficiency in the electrolytic cell, and each electrolytic cell is controlled separately, so there are many control points and multi-ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/26
Inventor 吴建国罗建梁易建新
Owner 吴建国
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