Production method of food-grade stabilized chlorine dioxide disinfectant

A production method and chlorine dioxide technology, which are applied in the directions of chlorine oxide, disinfectants, botanical equipment and methods, etc., can solve the problems of high cost, large amount of water vapor consumption, many by-products, etc. Side reactions, the effect of improving the conversion rate

Active Publication Date: 2011-09-14
苏州久泰集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the main raw material for preparing chlorine dioxide is sodium chlorate, and there are many production methods: such as the Mathieson method using sulfur dioxide as a reducing agent. This method is the oldest method for producing chlorine dioxide and requires less investment. , easy to operate, its shortcoming is that the yield of chlorine dioxide is low, and purity is low; The R2 method, R3 method and R4 method that use sodium chloride as reducing agent, the yield of chlorine dioxide produced by these methods is higher, but the chlorine dioxide The purity of chlorine is low, and there are many by-products in the p

Method used

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  • Production method of food-grade stabilized chlorine dioxide disinfectant

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Embodiment 1

[0040] (1) Methanol, polonium chloride, potassium chloride, acetic acid and sulfuric acid aqueous solution with a mass concentration of 50% were prepared into an acidic reaction solution, and the prepared mass ratio was: 50:0.4:0.4:2.5:1200;

[0041] (2) Continuously drop the acidic reaction solution prepared in step (1) into the saturated sodium chlorate aqueous solution in the reactor, control the pressure of the entire reaction system at 40mmHg, and the temperature of the reaction solution at 60°C;

[0042] (3) The chlorine dioxide gas produced in the step (2) is absorbed in two stages by the absorption liquid in the absorption tower to obtain a stable chlorine dioxide disinfectant; the absorption liquid is composed of water, solid caustic soda (i.e. Sodium hydroxide), solid borax and hydrogen peroxide, their mass ratio is 1:0.06:0.05:0.1.

Embodiment 2

[0044] (1) Methanol, polonium chloride, potassium chloride, acetic acid and sulfuric acid aqueous solution with a mass concentration of 50% are prepared into an acidic reaction solution, and the prepared mass ratio is: 50:0.5:0.5:2.5:1000;

[0045] (2) Continuously add the acidic reaction solution prepared in step (1) dropwise into the saturated sodium chlorate aqueous solution in the reactor, control the pressure of the entire reaction system to 50mmHg, and the temperature of the reaction solution to 70°C;

[0046] (3) The chlorine dioxide gas produced in step (2) is absorbed in two stages by the absorption liquid in the absorption tower to obtain a stable chlorine dioxide disinfectant; the absorption liquid consists of water, solid caustic soda, solid Composed of borax and hydrogen peroxide, their mass ratio is 1:0.06:0.05:0.1.

Embodiment 3

[0048](1) Methanol, polonium chloride, potassium chloride, acetic acid and sulfuric acid aqueous solution with a mass concentration of 50% were prepared into an acidic reaction solution, and the prepared mass ratio was: 50:0.3:0.3:2.5:800;

[0049] (2) Continuously drop the acidic reaction solution prepared in step (1) into the saturated sodium chlorate aqueous solution in the reactor, control the pressure of the entire reaction system to 40mmHg, and the temperature of the reaction solution to 80°C;

[0050] (3) The chlorine dioxide gas produced in the step (2) is absorbed in two stages by the absorption liquid in the absorption tower to obtain a stable chlorine dioxide disinfectant; the absorption liquid is composed of water, solid caustic soda, solid Composed of borax and hydrogen peroxide, their mass ratio is 1:0.06:0.05:0.1.

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Abstract

The invention relates to a production method of a food-grade stabilized chlorine dioxide disinfectant. The production method comprises the following steps: taking sodium chlorate as an oxidant as well as methanol in an acid medium as a reducing agent; preparing the methanol into acid reaction liquid of polonium chloride, potassium chloride, acetic acid and sulphuric acid solution; continuously dripping the acid reaction liquid into a saturated aqueous solution of sodium chlorate; keeping the system in negative pressure during the reaction process; and generating chlorine dioxide gas and then absorbing the chlorine dioxide gas by absorption liquid prepared with water, solid and flake caustic soda, solid borax and hydrogen peroxide, and finally obtaining the stabilized chlorine dioxide disinfectant. The production method can improve the utilization ratio of raw materials and the purity (up to 99 percent) of the chlorine dioxide gas, and is simple in process and low in production cost, and the obtained food-grade stabilized chlorine dioxide disinfectant is colorless, tasteless, non-irritating, non-toxic, non-corrosive and the like and is a safe and efficient food-grade disinfection product.

Description

technical field [0001] The invention relates to a production method of a chlorine dioxide disinfectant, in particular to a production method of a food-grade stable chlorine dioxide disinfectant. Background technique [0002] Chlorine dioxide is a broad-spectrum powerful bactericidal disinfectant. It is currently popular in developed countries such as Europe, the United States, and Japan. The research and application of chlorine dioxide in my country did not start until the early 1990s, and it has developed relatively rapidly in recent years. Especially since the outbreak of SARS and bird flu, chlorine dioxide products have attracted more attention. Chlorine dioxide is the main raw material for the production of subsequent products, stable chlorine dioxide and solid chlorine dioxide. Therefore, the preparation of chlorine dioxide is a key process for the preparation of subsequent products. The conversion rate and purity of chlorine dioxide directly affect the quality of relat...

Claims

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Application Information

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IPC IPC(8): C01B11/02A01N59/00A01P1/00
Inventor 冯佰荣马剑峰
Owner 苏州久泰集团有限公司
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