Production method of food-grade stabilized chlorine dioxide disinfectant

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...

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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 production process, so it is difficult to recover; the R5 method, R6 method, Kestine method, and the multi-stage reaction method developed by Canada's Chemodic Corporation, etc., which use hydrochloric acid as a reducing agent, these The disadvantage of the method is that the investment is large and the cost is high

The method can be carried out smoothly and continuously, and is simple to operate, easy to control, and high in production efficiency. The consumption of water vapor is relatively large, and the purity of chlorine dioxide is relatively low, and the concentration of the obtained chlorine dioxide solution is relatively small

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