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Production for stable chlorinedioxide solution

A chlorine dioxide and production method technology, applied in the direction of chlorine dioxide and the like, can solve the problems of difficulty in producing high-concentration, high-purity stable chlorine dioxide solution, difficult to accurately control process operation, difficult to control reaction process, etc. Continuous operation process, complete conversion of raw materials, and the effect of solving instability

Inactive Publication Date: 2003-09-03
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

The shortcoming that above-mentioned production method exists is, three kinds of raw materials are dripped and reacted in the single-stage reaction tank simultaneously, produce local overheating, react insufficiently, easily produce explosion phenomenon, process operation is difficult to accurately control etc. all can cause the speed of chlorine dioxide reaction, The absorption rate and purity decrease, the reaction process is difficult to control, and it is difficult to produce a high-concentration, high-purity stable chlorine dioxide solution. Usually the chlorine dioxide content is 2.0-2.5%, and the chlorine dioxide purity is low

Method used

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  • Production for stable chlorinedioxide solution

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Embodiment 1

[0025] project

Embodiment 2

[0027] Determine the product specification concentration as 4%. The weight ratio of composite catalyst sodium pyrophosphate, 2-hydroxyphosphonoacetic acid and urea is 1: 0.4: 0.6; the weight ratio of sodium chlorate, hydrogen peroxide, demineralized water and composite catalyst in the composite reaction solution is 1: 0.65: 0.76: 0.008; add composite stable absorption liquid to the combined absorption tower, the proportion is sodium carbonate 4%; sodium hydroxide 1%; hydrogen peroxide 8%; deionized water 87%, hydrogen peroxide concentration 30% , adjust the compound reaction liquid flow rate to 22L / h, the sulfuric acid solution flow rate to 26L / h, control the reaction negative pressure of the multi-step reactor at 0.04-0.42Mpa, and the reaction temperature at 32-35°C. After running for 15 hours, discharge 3.07 tons of stable chlorine dioxide aqueous solution, calculate raw material consumption cost to be 703 yuan / ton product, total yield 88.2%, measure chlorine dioxide purity ...

Embodiment 3

[0029] Determine the product specification concentration as 8%. The weight ratio of composite catalyst sodium pyrophosphate, 2-hydroxyphosphonoacetic acid and urea is 1: 0.5: 0.1; the weight ratio of sodium chlorate, hydrogen peroxide, demineralized water and composite catalyst in the composite reaction solution is 1: 0.65 : 0.8: 0.008; In the combined absorption tower, add composite stable absorption liquid, proportioning is sodium carbonate 5%; Sodium hydroxide 4.5%; Hydrogen peroxide 16%; Deionized water 74.5%, adjust composite reaction liquid flow rate to be 27.5% L / h, the sulfuric acid solution flow rate is 18.5L / h; the pure water flow rate: 14L / h; the reaction negative pressure of the multi-step reactor is controlled at 0.04-0.42Mpa, and the reaction temperature is 32-35°C. After running for 8 hours, discharge 1.08 tons of stable chlorine dioxide aqueous solution, calculate raw material consumption cost to be 1448 yuan / ton product, total yield 87.9%, measure chlorine dio...

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Abstract

A process for preparing stable ClO2 solution includes such steps as preparing composite reactive liquid from H2O2 as reducer, the catalyst prepared from sodium pyrophosphate, 2-hydroxy phosphonoacetic acid and urea, and chlorate of alkali metal, staircase reacting on sulfuric acid solution to generate high-purity ClO2 gas, and absorbing by stable absorbing liquid in absorption tower. Its advantages are high productivity and stability, and low cost.

Description

technical field [0001] The invention relates to a production method of a stable chlorine dioxide solution. Background technique [0002] Chlorine dioxide solution, as an efficient, broad-spectrum, fast, non-toxic bactericidal disinfectant, deodorant, anti-fungal agent, food insurance agent, water quality and air purifier and excellent pulp bleaching agent, has been widely used in the world in recent years. It has been widely researched and applied, and has broad market prospects. At present, the domestic leading process is sodium chlorite conversion method and methanol reduction method. The raw material and power consumption of sodium chlorite conversion method are more than 3 times higher than the foreign average level. The methanol reduction method also has complex production equipment and high reaction temperature. , methanol content in the finished product is easy to exceed the standard, which restricts the popularization and application of stable chlorine dioxide solut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/02
Inventor 王奎涛张炳烛
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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