Continuous production method of bromochlorohydantoin

A kind of technology of bromochlorohydantoin and production method, applied in the field of continuous production of bromochlorohydantoin, can solve the problems of cumbersome production steps and high production costs, and achieve the effects of reducing production costs, hidden dangers of production safety, and reducing production steps

Active Publication Date: 2020-09-18
河北利仕化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a continuous production method of bromochlorohydantoin, aim...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: a kind of bromochlorohydantoin continuous production method comprises the following steps:

[0029] 1. Add acetone cyanohydrin and water respectively into the enamel mixing tank for mixing to obtain a mixture of acetone cyanohydrin and water;

[0030] 2. Put the steam into the jacket of the tower reactor, pass the carbon dioxide and ammonia gas from the bottom of the tower reactor, and the mixed solution of acetone cyanohydrin and water enter from the top of the reactor, so that the gas phase is highly dispersed in the liquid phase To carry out the reaction, after the quantitative addition of acetone cyanohydrin, the circulation pump is used to circulate the middle and top of the tower for 2 hours, and the material flows into the synthetic enamel reaction kettle from the bottom of the tower. Among them, the molar ratio of acetone cyanohydrin, carbon dioxide and ammonia is 1:2.5:1.2.

[0031] Steam was introduced into the jacket of the synthetic enamel rea...

Embodiment 2

[0037] 1. Add acetone cyanohydrin and water respectively into the enamel mixing tank for mixing to obtain a mixture of acetone cyanohydrin and water;

[0038] 2. Put the steam into the jacket of the tower reactor, pass the carbon dioxide and ammonia gas from the bottom of the tower reactor, and the mixed solution of acetone cyanohydrin and water enter from the top of the reactor, so that the gas phase is highly dispersed in the liquid phase To carry out the reaction, after the quantitative addition of acetone cyanohydrin, the circulation pump is used to circulate the middle and top of the tower for 2 hours, and the material flows into the synthetic enamel reaction kettle from the bottom of the tower. Wherein, the molar ratio of acetone cyanohydrin, carbon dioxide and ammonia is 1:3.5:2.0.

[0039] Steam was introduced into the jacket of the synthetic enamel reaction kettle, and the reaction temperature of the materials was controlled at 80° C. for 4 hours. After the reaction, ...

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PUM

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Abstract

The invention discloses a continuous production method of bromochlorohydantoin, belonging to the technical field of disinfectant production. The continuous production method comprises the following steps: synthesizing 5,5-dimethylhydantoin, removing ammonia from an aqueous 5,5-dimethylhydantoin solution, and preparing bromochlorohydantoin. According to the method, water, ammonia gas, carbon dioxide and acetone cyanohydrin are used as raw materials for a reaction to synthesize 5,5-dimethylhydantoin; introducing inert gas into the aqueous 5,5-dimethylhydantoin solution to remove dissolved ammonia; and adding 5,5-dimethylhydantoin and inorganic base into a reaction kettle, conducting cooling, introducing bromine and chlorine, carrying out a bromination and chlorination reaction, centrifugallyspin-drying a reaction material after the reaction is finished, and conducting drying to obtain powdery bromochlorohydantoin. According to the method, dissolved ammonia in the aqueous 5,5-dimethylhydantoin solution is removed through the inert gas, and then bromochlorohydantoin is synthesized, so production steps are reduced, and production cost and potential safety hazards are reduced; and meanwhile, dimethylhydantoin synthesis to continuous bromochlorohydantoin production is realized by linking all the procedures through a conveying pipeline.

Description

technical field [0001] The invention belongs to the technical field of disinfectant production, in particular to a continuous production method of bromochlorohydantoin. Background technique [0002] Bromochlorohydantoin is a kind of disinfectant with specific performance. The residue 5,5-dimethylhydantoin after disinfection and sterilization of bromochlorohydantoin can be rapidly degraded into ammonia and carbon dioxide under natural conditions, which is harmful to the environment. The impact is small, and it is a water treatment chemical advocated and encouraged by the state. Widely used in industrial water treatment, disinfection and sterilization of flowers and seeds, aquaculture, fruit preservation, etc. [0003] At present, the current production of bromochlorohydantoin is mainly synthesized from 5,5-dimethylhydantoin, inorganic alkali, chlorine gas, and bromine, with high output and good product quality. Therefore, domestic bromochlorohydantoin production enterprises ...

Claims

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Application Information

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IPC IPC(8): C07D233/82
CPCC07D233/82Y02P20/141
Inventor 李伟宪李丽敏李爱军陈波李伟光王志强赵晓鹏
Owner 河北利仕化学科技有限公司
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