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Method for preparing peroxysulfuric acid by sonoelectrochemical method

A technology of ultrasonic electrochemistry and monosulfuric acid, applied in the electrolysis process, electrolysis components, electrolysis organic production and other directions, can solve the problems such as no successful reports of synthesis, shorten the reaction time, reduce the concentration polarization, and improve the current efficiency Effect

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

AI Technical Summary

Problems solved by technology

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 preparing peroxysulfuric acid by sonoelectrochemical method
  • Method for preparing peroxysulfuric acid by sonoelectrochemical method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add sulfuric acid solution with a concentration of 20% into the electrolytic cell, pure platinum is the anode, the cathode is the lead plate, the sulfonic anion membrane separates the negative and positive areas, ultrasonic waves are added to the bottom of the electrolytic cell, the electrolytic voltage is 3V, and the current density is 1500A / m 2 , the ultrasonic frequency is 20kHz, and the ultrasonic sound intensity is 10W / m 2 , the reaction temperature is 0°C, ultrasonic electrolysis is performed for 4 hours, and the concentration of the prepared oxidant peroxymonosulfuric acid is 0.9 mol / L.

Embodiment 2

[0016] Add sulfuric acid solution with a concentration of 30% into the electrolytic cell, pure platinum is the anode, the cathode is the lead plate, the sulfonic anion membrane separates the negative and positive areas, the electrolytic voltage is 5V, and the current density is 2500A / m 2 , add ultrasonic waves at the bottom of the electrolytic tank, the ultrasonic frequency is 60kHz, and the ultrasonic sound intensity is 5W / cm 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 0.95 mol / L.

Embodiment 3

[0018] Add sulfuric acid solution with a concentration of 45% into the electrolytic cell, pure platinum is the anode, the cathode is the lead plate, the sulfonic anion membrane separates the negative and positive areas, the electrolysis voltage is 6V, and the current density is 5000A / m 2 , add ultrasonic waves at the bottom of the electrolytic tank, the ultrasonic frequency is 100kHz, and the ultrasonic sound intensity is 20W / cm 2 , the reaction temperature is 40 DEG C, ultrasonic electrolysis for 2 hours, the concentration of the prepared oxidant peroxymonosulfuric acid is 1mol / L.

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Abstract

The invention discloses a method for preparing peroxysulfuric acid by a sonoelectrochemical method, which is characterized in that in the method, a sulphuric acid solution is placed in an electrolyzer; pure platinum serves as an anode, and a lead board or thermal shock graphite serves as a cathode; the cathode and the anode are separated by a sulfonic group anion selecting membrane; an ultrasonic is added at the bottom of the electrolyzer; the electrolysis temperature is 0-40 DEG C, and the electrolysis voltage is kept between 3V and 7V, and the current density is 1000A / m<2>-6000A / m<2>; the frequency of the added ultrasonic is 20kHz-100kHz, the sound intensity of the ultrasonic is 5-20W / m<2>, and the electrolysis time of the ultrasonic is 1-5 hours; and sulfate radicals in the sulphuric acid solution at the anode zone is subject to an oxidation reaction to produce the peroxysulfuric acid. Compared with the conventional method for preparing peroxysulfuric acid by the high concentration synthesis method, the invention has the advantages of simple method, reduced energy consumption, shortened reaction time, higher activity of a generated oxidant and the like.

Description

technical field [0001] The invention relates to the preparation of an oxidizing agent, in particular to a method for preparing peroxymonosulfuric acid by means of sonoelectrochemistry. Background technique [0002] Oxidizing agents are widely used in hydrometallurgical processes and advanced oxidation technologies in environmental engineering. Existing oxidants mainly include permanganate, oxygen, ferrate, chlorine, ozone, hypochlorite, etc.; but these oxidants have high toxicity, low oxidation potential, large reagent consumption, high cost, and residual reagent pollution. and other problems; 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 oxidant is often added and accompanied by multiple oxidations, resulting in extremely difficult follow-up treatment. [0003] As a novel oxidizing agent, peroxymonosulfuric acid has an oxidation potential...

Claims

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Application Information

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IPC IPC(8): C25B3/02C25B3/23
Inventor 洪涛李林波薛娟琴张毅
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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