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A kind of method for preparing potassium permanganate by ion membrane electrolysis

A technology of ion membrane electrolysis and ion membrane electrolyzer, which is applied in the direction of manganate/permanganate, electrolysis process, electrolysis components, etc., can solve the problems of energy saving, environmental protection, low labor efficiency, serious environmental pollution, etc. that are not in line with industrial production , to achieve the effect of compact structure, increase production capacity and avoid environmental pollution

Active Publication Date: 2018-03-06
广东航鑫科技股份公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation of potassium permanganate without diaphragm and open batch operation method not only has a large area of ​​equipment, long production cycle, low labor efficiency, but also high energy consumption and serious environmental pollution. This preparation method can no longer meet the growing demand. The market's demand for potassium permanganate does not meet the requirements of industrial production for energy conservation and environmental protection

Method used

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  • A kind of method for preparing potassium permanganate by ion membrane electrolysis
  • A kind of method for preparing potassium permanganate by ion membrane electrolysis
  • A kind of method for preparing potassium permanganate by ion membrane electrolysis

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Effect test

Embodiment 1

[0039] Assemble the ionic membrane electrolyzer, and fill the electrolyzer with graphite carbon felt. In the above-mentioned ionic membrane electrolyzer, the anode chamber is filled with 60g / L potassium manganate electrolyte, the temperature of the electrolyte in the tank is 75±5°C, 5 steps of current, and after the solution is circulated and electrolyzed for 2.5 hours, the conversion rate of potassium manganate is 85.3%, and the current efficiency is 80.5%.

Embodiment 2

[0041]Assemble the ionic membrane electrolyzer, and fill the electrolyzer with graphite carbon felt. In the above-mentioned ionic membrane electrolyzer, the anode chamber is filled with 67.9g / L potassium manganate electrolyte, the temperature of the electrolyte in the tank is 75±5°C, 5 steps of current, and after 2.5 hours of solution circulation and electrolysis, the conversion rate of potassium manganate is 88.5%, and the current efficiency is 87.2%.

Embodiment 3

[0043] Assemble the ionic membrane electrolyzer, and fill the electrolyzer with graphite carbon felt. In the above-mentioned ionic membrane electrolyzer, the anode chamber is filled with 73.9g / L potassium manganate electrolyte, the temperature of the electrolyte in the tank is 75±5°C, 5 steps of current, after 2.5 hours of solution circulation electrolysis, the conversion rate of potassium manganate is 86.7%, and the current efficiency is 83.4%.

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Abstract

The invention discloses a method for preparing potassium permanganate by ion membrane electrolysis and a special electrolytic cell applied to the method; it belongs to the technical field of potassium permanganate preparation technology; the technical points include the following steps: (1) assembling the ion membrane Electrolytic cell, filled with conductive material in the electrolytic cell; (2) Heating the solution; (3) Connecting the circulation flow pipeline of the solution in and out of the electrolytic cell; the electrolyte and KOH solution circulate, and the flow rate is controlled at 0.1-0.3L / min; (4 ) to connect the wires, turn on the power supply, adjust the initial current to 6‑10A, and the current drops by 1.5 to 2.5A every 0.5 hours of electrolysis; the electrolysis is completed after 2.5 hours of circulation; the present invention aims to provide an ionic membrane that can greatly improve the current efficiency A method for preparing potassium permanganate by electrolysis and a special electrolytic cell applied to the method; it is used for the preparation of potassium permanganate.

Description

technical field [0001] The present invention relates to a kind of technology of preparing potassium permanganate, more specifically, relate to a kind of method for preparing potassium permanganate by ion membrane electrolysis. The present invention also relates to a special electrolyzer corresponding to the above method. Background technique [0002] Potassium permanganate is an important inorganic chemical product with strong oxidizing properties. It is widely used in light industry, chemical industry, metallurgy, medicine, environmental protection, agriculture, petroleum, military industry, aquaculture, water treatment and other industries. In recent years, with the rapid development of various industries, the market demand for potassium permanganate is increasing year by year. [0003] The industrial preparation of potassium permanganate is first to prepare potassium manganate by high-temperature reaction of pyrolusite, oxygen and potassium hydroxide, and then further el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/00C25B9/00C25B9/08C01G45/12C25B9/19
Inventor 唐春保赖俐超张丰如刘燕杨海
Owner 广东航鑫科技股份公司