Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing stable chlorine dioxide by bi-reduction method

A chlorine dioxide and stability technology, applied in chlorine dioxide and other directions, can solve the problems of low chlorine dioxide purity, increased sewage treatment capacity, high sulfuric acid consumption per ton, and achieve the effects of easy control, balanced operation and high conversion rate.

Inactive Publication Date: 2010-07-07
淄博华润科贸有限责任公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The main problems in these production processes are the high sulfuric acid consumption per ton, which increases the amount of subsequent sewage treatment; the purity of chlorine dioxide produced is relatively low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Prepare sulfuric acid solution (A solution) and 30% sodium chlorate (B solution) with a mass concentration of 30% respectively, and mix the two solutions at a mass ratio of 1:1 to generate C solution, a mixture of sulfuric acid and sodium chlorate The content ratio is 1:1.

[0021] 2, feed sulfur dioxide gas and hydrogen peroxide to react under the situation of 50 ℃, generate chlorine dioxide gas, sulfur dioxide amount is 30% of sodium chlorate quality, hydrogen peroxide (25%) amount is 20% of sodium chlorate quality.

[0022] 3. Pass the above-mentioned generated chlorine dioxide gas into a mixed solution of 2.5% sodium carbonate and 1.25% hydrogen peroxide by mass percentage to absorb for 10 hours to generate 2% stable chlorine dioxide product.

[0023] The conversion rate of sodium chlorate is 98.5%, the purity of chlorine dioxide gas in the stable chlorine dioxide product is 99.6%, and 130kg of sulfuric acid is used per ton.

Embodiment 2

[0025] 1. Prepare sulfuric acid solution (A liquid) and 60% sodium chlorate (B liquid) with a mass concentration of 60% respectively, and mix the two solutions at a mass ratio of 1:1 to generate C liquid, a mixture of sulfuric acid and sodium chlorate The content ratio is 1:1.

[0026] 2, feed sulfur dioxide gas and hydrogen peroxide to react under the situation of 40 ℃, generate chlorine dioxide gas, sulfur dioxide amount is 40% of sodium chlorate quality, and hydrogen peroxide (25%) amount is 30% of sodium chlorate quality.

[0027] 3. Pass the above-mentioned generated chlorine dioxide gas into a mixed solution of 10% sodium carbonate and 5% hydrogen peroxide for absorption for 20 hours to generate 8% stable chlorine dioxide product.

[0028] The conversion rate of sodium chlorate is 98.8%, the purity of chlorine dioxide gas in the stable chlorine dioxide product is 99.5%, and 490kg of sulfuric acid is used per ton.

Embodiment 3

[0030] 1. Prepare sulfuric acid solution (A solution) and 40% sodium chlorate (B solution) with a mass concentration of 40% respectively, and mix the two solutions at a mass ratio of 1:1 to generate C solution, a mixture of sulfuric acid and sodium chlorate The content ratio is 1:1.

[0031] 2, feed sulfur dioxide gas and hydrogen peroxide to react under the situation of 50 ℃, generate chlorine dioxide gas, sulfur dioxide amount is 30% of sodium chlorate quality, hydrogen peroxide (25%) amount is 20% of sodium chlorate quality.

[0032] 3. Pass the above-mentioned generated chlorine dioxide gas into a mixed solution of 6% sodium carbonate and 3% hydrogen peroxide for absorption for 16 hours to generate 4.8% stable chlorine dioxide product.

[0033] The conversion rate of sodium chlorate is 98.6%, the purity of chlorine dioxide gas in the stable chlorine dioxide product is 99.5%, and 300kg of sulfuric acid is used per ton.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for producing stable chlorine dioxides through the double reduction method, which is characterized in that: sulfur dioxide and oxydol are utilized to be reducing agents; sodium chlorate acid solution is oxidized at a temperature of between 30 and 70 DEG C to generate gaseous chlorine dioxide; and sodium carbonate and oxydol are used for absorbing the gaseous chlorine dioxide to generate the stable chlorine dioxide. The method has the main technical characteristics that: by adoption of the sulfur dioxide and the oxydol as the reducing agents simultaneously, the purity of products and the conversion rate of raw materials are improved; the conversion rate of sodium chlorate is as high as over 98 percent and the purity of the gaseous chlorine dioxide generated is as high as over 99 percent; the use level of sulphuric acid is reduced; and the processing capacity of waste acid in the subsequent technique is reduced. The technique is balanced in operation, is easy to control and reduces the risk during the production process.

Description

technical field [0001] The present invention relates to the production method of chlorine dioxide. Background technique [0002] At present, the chlorine dioxide production process is mainly based on the sodium chlorate method, using sulfuric acid or hydrochloric acid for reaction, and adding different reducing agents to improve the conversion rate of sodium chlorate and the purity of chlorine dioxide produced. [0003] At present, the main production processes of stable chlorine dioxide are: [0004] a) sodium chlorate, sulfuric acid, sulfur dioxide method; [0005] b) sodium chlorate, sulfuric acid, hydrogen peroxide method; [0006] c) sodium chlorate, sulfuric acid, methanol method; [0007] The sodium chlorate, sulfuric acid and sulfur dioxide method mainly uses sodium chlorate and sulfuric acid to react, and chlorine dioxide is used as a reducing agent. The chlorine dioxide produced is absorbed by sodium carbonate, and the purity of the generated chlorine dioxide ga...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B11/02
Inventor 高润泽张增禄王东生刘丽
Owner 淄博华润科贸有限责任公司