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Bromochlorohydantoin continuous production method

A technology of bromochlorohydantoin and its production method, which is 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: 2022-02-22
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, aiming to solve the technical problems of cumbersome production steps and high production cost in the above-mentioned prior art

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, which belongs to the technical field of disinfectant production and comprises the following steps: synthesizing 5,5-dimethylhydantoin-5,5-dimethylhydantoin to remove ammonia from water ‑Preparation of bromochlorohydantoin. The present invention utilizes water, ammonia gas, carbon dioxide and acetone cyanohydrin as raw materials to react and synthesize 5,5-dimethylhydantoin; 5,5-dimethylhydantoin is passed into an aqueous solution to remove dissolved ammonia; 5, After adding 5-dimethylhydantoin and inorganic alkali into the reaction kettle to cool down, bromine and chlorine gas are introduced to carry out bromine chlorination reaction. After the reaction, the reaction materials are centrifugally dried and dried to prepare powdered bromochlorohydantoin. The present invention removes the dissolved ammonia in the 5,5-dimethylhydantoin aqueous solution by an inert gas, and then synthesizes bromochlorohydantoin, thereby reducing production steps, production costs and potential safety hazards, and at the same time adopts a transportation pipeline to link various processes to realize The continuous production from the synthesis of dimethylhydantoin to bromochlorohydantoin.

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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Patent Type & Authority Patents(China)
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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