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Raw liquid for preparing chlorine dioxide, method and device for preparing chlorine dioxide

A chlorine dioxide and raw material solution technology, applied in the direction of chlorine oxidation, can solve the problems of low raw material conversion rate, low output, slow reaction speed, etc., achieve high raw material conversion rate, reduce acid discharge, and increase by-product value Effect

Inactive Publication Date: 2007-12-05
穆超碧
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reactor used is generally a reactor with a stirrer, the output of this reactor is not high in the continuous production of chlorine dioxide, and the conversion rate of raw materials is low
The reducing agents methanol, hydrogen peroxide and urea are usually used alone, but if methanol is used as the reducing agent, the reaction speed is slow, the purity of chlorine dioxide is low, and methanol is flammable and toxic, so it is not safe to use; if urea is used as the reducing agent, the reaction The start is very slow, once the reaction starts, the speed is very fast, difficult to control, prone to explosion, and the conversion rate of raw materials is low; if hydrogen peroxide is used as the reducing agent, the production cost is high, and it is difficult to popularize and apply

Method used

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  • Raw liquid for preparing chlorine dioxide, method and device for preparing chlorine dioxide

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Effect test

Embodiment 1

[0038] The method that embodiment 1, chlorate prepare chlorine dioxide, its reaction steps are:

[0039] 1. Configure the raw material solution: use water as a solvent, wherein the mass percentage of sodium chlorate is 20%, the mass percentage of urea is 2%, and the mass percentage of hydrogen peroxide is 1%;

[0040] 2. Feedstock solution and sulfuric acid are added to the first-stage reactor of the reaction device of the present invention at a uniform speed at a volume ratio of 1: 0.2, and the reaction temperature is 35° C., and the reaction is carried out under the condition that the negative pressure value in the reactor is 100~500mmHg. The generated chlorine dioxide is collected, and the residual liquid of the reaction is sent to the second-stage reactor;

[0041] 3. In the second-stage reactor, the reaction is carried out under the condition that the reaction temperature is 50°C and the negative pressure in the reactor is 100-500mmHg, and the generated chlorine dioxide i...

Embodiment 2

[0044] The method that embodiment 2, chlorate prepare chlorine dioxide, its processing step is:

[0045] 1, configuration raw material liquid: with water as solvent, wherein, the mass percentage of sodium chlorate is 33%, the mass percentage of urea is 3%, the mass percentage of sucrose is 2%;

[0046] 2. Feedstock solution and sulfuric acid are added to the first-stage reactor of the reaction device of the present invention at a uniform speed at a volume ratio of 1: 0.4, and the reaction temperature is 35° C., and the reaction is carried out under the condition that the negative pressure value in the reactor is 100 to 500 mmHg. The generated chlorine dioxide is collected, and the residual liquid of the reaction is sent to the second-stage reactor;

[0047] 3. In the second-stage reactor, the reaction is carried out under the condition that the reaction temperature is 45°C and the negative pressure in the reactor is 100-500mmHg, and the generated chlorine dioxide is collected,...

Embodiment 3

[0050] Embodiment 3, the method that chlorate prepares chlorine dioxide, its processing step is:

[0051] 1. Configure the raw material solution: use water as a solvent, wherein the mass percentage of sodium chlorate is 50%, the mass percentage of urea is 5%; the mass percentage of hydrogen peroxide is 3%;

[0052] 2. Feedstock solution and sulfuric acid are added to the first-stage reactor of the reaction device of the present invention at a uniform speed at a volume ratio of 1: 0.8, and the reaction temperature is 40° C. and the reaction is carried out under the condition that the negative pressure value in the reactor is 100 to 500 mmHg. The generated chlorine dioxide is collected, and the residual liquid of the reaction is sent to the second-stage reactor;

[0053] 3. In the second-stage reactor, the reaction is carried out under the condition that the reaction temperature is 55°C and the negative pressure in the reactor is 100-500mmHg, and the generated chlorine dioxide i...

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Abstract

The present invention relates to sterilizing and bleaching agent technology, and is especially process, apparatus and material liquid for preparing chlorine dioxide. The material liquid consists of chlorate 10-65 wt%, urea 0.5-10 wt%, hydrogen peroxide or cane sugar 0.5-8 wt% and water for the rest. The preparation process of chlorine dioxide includes the reaction of the material liquid in multiple stage serially connected reaction apparatus while heating and in negative pressure condition. The preparation process has material converting rate higher than 85 %, purity of the prepared chlorine dioxide higher than 98 %, low cost, high safety and reliability, reuse of residual liquid and no waste exhaustion.

Description

technical field [0001] The invention relates to a chlorine dioxide preparation method, a device and a raw material solution for preparing chlorine dioxide, specifically, it belongs to the fields of disinfection and bleaching agents. Background technique [0002] Chlorine dioxide is a broad-spectrum powerful bactericidal disinfectant, high-efficiency oxidant and bleaching agent. The World Health Organization has designated it as an IA-level high-efficiency and safe disinfectant. It is widely used in medical and health care, food processing, fresh-keeping, water purification, and bleaching. . [0003] At present, there are mainly electrolytic and chemical methods for the preparation of chlorine dioxide. Chlorine dioxide prepared by electrolysis has not been widely used due to its low purity. There are mainly chlorite method and chlorate method for the preparation of chlorine dioxide by chemical methods. The chlorite method is difficult to popularize and use because of the hi...

Claims

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Application Information

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IPC IPC(8): C01B11/02
Inventor 穆超碧
Owner 穆超碧
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