Method for electrochemically preparing peroxysulfuric acid

An electrochemical, monosulfuric acid technology, applied in the direction of electrolysis process, electrolysis components, cells, etc., can solve the problems of no successful synthesis, difficult to produce hydrogen peroxide, etc., and achieve the effects of high energy, easy operation and short action time.

Inactive Publication Date: 2010-10-20
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are also domestic scholars using hydrogen peroxide and concentrated sulfuric acid to synthesize peroxymonosulfuric acid, but because it is difficult to produce hydrogen peroxide with a concentration higher than 30% in China, there is no successful report on the synthesis

Method used

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  • Method for electrochemically preparing peroxysulfuric acid
  • Method for electrochemically preparing peroxysulfuric acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add sulfuric acid solution with a concentration of 30% into the electrolytic cell, and add 0.5g / L ammonium thiocyanate additive; pure platinum is the anode, the cathode is the lead plate, and the sulfonic acid-based anion membrane separates the negative and positive areas. The electrolytic voltage is 5V, and the current Density 1500A / m 2 , the reaction temperature is 10°C, ultrasonic electrolysis is performed for 2 hours, and the concentration of the prepared oxidant peroxymonosulfuric acid is 0.459 mol / L.

Embodiment 2

[0018] Add sulfuric acid solution with a concentration of 35% into the electrolytic cell, and add 0.5g / L thiourea additive; pure platinum is the anode, the cathode is the lead plate, and the sulfonic anion membrane separates the negative and positive areas, the electrolytic voltage is 5.5V, and the current density 2500A / m 2 , the reaction temperature is 20 DEG C, ultrasonic electrolysis is carried out for 3 hours, and the concentration of the prepared oxidant peroxymonosulfuric acid is 0.585 mol / L.

Embodiment 3

[0020] Add sulfuric acid solution with a concentration of 25% into the electrolytic cell, and add 0.7g / L ethylenediamine additive; platinum-plated titanium is used as the anode, thermal shock graphite is used as the negative plate, and the sulfonic acid-based anion membrane separates the negative and positive areas, and the electrolytic voltage is 6V , current density 4000A / m 2 , the reaction temperature is 30°C, ultrasonic electrolysis is performed for 4 hours, and the concentration of the prepared oxidant peroxymonosulfuric acid is 0.5625mol / L.

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Abstract

The invention discloses a method for electrochemically preparing peroxysulfuric acid, wherein a sulfuric acid solution is placed in an electrolytic cell; the anode is made from pure platinum or platinum-plated titanium material, the cathode is a lead plate or thermal-shock graphite, a sulfo-anion selective membrane is used for separating a cation region and an anion region, the temperature of electrolysis is 0-40 DEG C, the voltage of electrolysis is kept at 3-7V, the density of current is 1000-6000A / m<2>, and the time of electrolysis is 1-5 hours; and the sulfate radical generates the oxidizing reaction in the sulfuric acid solution of the cation region so as to prepare the peroxysulfuric acid. Compared with the conventional high-concentration synthesis method for preparing the peroxysulfuric acid, the method of the invention has the characteristics of simpleness and convenience, less energy consumption, shorter reaction time, higher oxidant activity and the like.

Description

technical field [0001] The present invention relates to the preparation of oxidants, in particular to a method for electrochemically preparing peroxymonosulfuric acid. Background technique [0002] In the advanced oxidation technology of hydrometallurgical process and environmental engineering, a large number of oxidants are used; the existing oxidants mainly include permanganate, oxygen, ferrate, chlorine, ozone, hypochlorite, etc.; but these oxidants are toxic high, low oxidation potential, high reagent consumption, high cost, and environmental pollution by residual reagents; and the oxidant used is either solid or gas, and the oxidation efficiency in the solution is low; therefore, in order to achieve the purpose of effective treatment, a large amount of The oxidizing agent is accompanied by multiple oxidations, making subsequent treatment extremely difficult. [0003] As an oxidizing agent, the persulfuric acid phase has an oxidation potential of 2.0 or more than other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/22C25B9/08C25B9/19
Inventor 薛娟琴李林波洪涛张毅
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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