Preparation method of liquid potassium ferrate by utilizing ultrasonic electrolysis

Abstract

The invention discloses a preparation method of liquid potassium ferrate by utilizing ultrasonic electrolysis. The method adopts an electrolysis device, which comprises an ultrasonic wave generator and an electrolytic tank, wherein the electrolytic tank is arranged in the ultrasonic wave generator and is divided into a cathode chamber and an anode chamber by a perfluorinated ion membrane. The method comprises the following steps: (1) preparing anode electrolyte, wherein the solvent is water, the potassium hydroxide concentration is 14 to 18 mol / L, and the potassium chloride concentration is 0.5 to 2 mol / L; and preparing cathode electrolyte, wherein the solvent is water, the potassium hydroxide concentration is 1 to 3 mol / L, and the potassium chloride concentration is 0.5 to 2 mol / L; (2) starting the ultrasonic wave generator during the electrolysis process, controlling the current density in a range of 50 to 200 mA / cm2 and the temperature in a range of 30 to 40 DEG C, and obtaining liquid perfluorinated ion membrane after electrolysis. The method has the advantages of simple steps, convenient operation, and high product concentration.

Description

technical field [0001] The invention relates to the technical field of potassium ferrate preparation, in particular to a method for preparing liquid potassium ferrate by ultrasonic electrolysis. Background technique [0002] With the rapid development of global industrialization, the world's demand for water is also increasing, resulting in more and more serious water pollution. Water pollution has seriously affected people's health and life, and water pollution control has become one of the most concerned issues in the world's environmental governance. Due to the increase of refractory toxic and harmful substances in water, it is more and more urgent to study new and efficient water treatment technologies. In the past century, chlorine-based disinfectants have been the mainstream products in water treatment, while aluminum-based water purifiers have dominated the purification and flocculation process. However, recent studies have found that chlorine-based disinfectants wil...

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Problems solved by technology

This process has two major disadvantages: the preparation and decomposition of hypochlorite involves the presence of chlorine gas, which not only severely corrodes equipment, but also pollutes the working environment. At the same time, chlorine gas is toxic and poses certain safety hazards

[0009] The main disadvantages of the current potassium ferrate preparation method are: a) use chlorine gas in the preparation process, which will cause corrosion to the equipment, and it will be troublesome to dispose of high-concentration chlorine-containing waste liquid, which will inevitably pollute the environment; b) the existence of high-valent metal ions It will promote the decomposition of ferrate, which is not conducive to its stability; c) in the current electrochemical method, the anode plate is easy to form a passivation film, which reduces the current efficiency; d) the purification process of potassium ferrate is complicated, and organic solvents such as ether will be used. It is easy to cause damage to the body of the experimenter; e) In the actual application process of water treatment, solid potassium ferrate needs to be dissolved, and the process is cumbersome

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