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Reactor and method for continuously synthesizing epoxy chloropropane

A tubular reactor and mixer technology, applied in chemical instruments and methods, chemical/physical/physical chemical reactors, chemical/physical/physical chemical fixed reactors, etc., can solve the problems of large waste water, energy consumption and Problems such as high operating cost and low reaction temperature

Pending Publication Date: 2019-12-17
JIANGSU YANGNONG CHEM GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction temperature of this process is low, resulting in high energy consumption and operating costs; and the amount of waste water is huge, about 8-10t / t epichlorohydrin; excessive hydrogen peroxide, there are potential safety hazards

Method used

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  • Reactor and method for continuously synthesizing epoxy chloropropane
  • Reactor and method for continuously synthesizing epoxy chloropropane
  • Reactor and method for continuously synthesizing epoxy chloropropane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040](1) Stir the catalyst and allyl chloride in the catalyst dispersion tank evenly, the dosage of the catalyst is 5% of the mass of allyl chloride, and the concentration of hydrogen peroxide is 50%. In the tubular reactor, the reaction temperature is controlled at 45°C; the mixed material enters the tubular reactor to contact, mix, and react with hydrogen peroxide; the reaction controls the material flow rate, and the residence time is 2h; after the reaction process is completed, the effluent leaving the reaction zone is Epichlorohydrin reaction solution.

[0041] (2) Analyzing the epichlorohydrin reaction solution, the conversion rate of hydrogen peroxide was 98.5%, and the yield and selectivity of epichlorohydrin were 90.8% and 99.1%, respectively.

Embodiment 2

[0043] (1) Stir the catalyst and allyl chloride in the catalyst dispersion tank evenly, the dosage of the catalyst is 5% of the mass of allyl chloride, and the concentration of hydrogen peroxide is 30%. In the tubular reactor, the reaction temperature is controlled at 50°C; the mixed material enters the tubular reactor to contact, mix, and react with hydrogen peroxide; the reaction controls the flow rate of the material, and the residence time is 2h; after the reaction process is completed, the effluent leaving the reaction zone is Epichlorohydrin reaction solution.

[0044] (2) Analyzing the epichlorohydrin reaction solution, the conversion rate of hydrogen peroxide was 98.5%, and the yield and selectivity of epichlorohydrin were 94.7% and 96.1%, respectively.

Embodiment 3

[0046] (1) Stir the catalyst and allyl chloride in the catalyst dispersion tank evenly, the dosage of the catalyst is 10% of the mass of allyl chloride, and the concentration of hydrogen peroxide is 50%. In the tubular reactor, the reaction temperature is controlled at 50°C; the mixed material enters the tubular reactor to contact, mix and react with hydrogen peroxide; the reaction controls the material flow rate, and the residence time is 4h; after the reaction process is completed, the effluent leaving the reaction zone is Epichlorohydrin reaction solution.

[0047] (2) Analyzing the epichlorohydrin reaction solution, the conversion rate of hydrogen peroxide was 99.5%, and the yield and selectivity of epichlorohydrin were 95.6% and 96.1%, respectively.

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Abstract

The invention belongs to the field of catalytic synthesis, and relates to a method for catalytically preparing an epoxy resin key intermediate epoxy chloropropane. The method is characterized in thatan independently developed tree-shaped tubular mixer is used to realize continuous application of a catalyst in the hydrogen peroxide technology epoxy chloropropane synthesis process. The method is anew technology capable of realizing continuous production of epoxy chloropropane.

Description

technical field [0001] The invention belongs to the field of catalytic synthesis, and relates to a method for catalytically preparing epichlorohydrin, a key intermediate of epoxy resin, in particular to a method using a self-developed tubular reactor and a three-phase separator device to realize the hydrogen peroxide method The continuous application of catalysts in the synthesis process of epichlorohydrin is a new process that can realize the continuous production of epichlorohydrin. Background technique [0002] Epichlorohydrin, also known as epichlorohydrin, is a volatile and unstable colorless liquid. It is mainly used in the preparation of glycerin, epoxy resin, and chlorohydrin rubber. It is an important raw material for the production of glycerin and glycidol derivatives, and can be used as an organic solvent. The epoxy resin prepared from it has the characteristics of strong adhesion, resistance to chemical medium corrosion, low shrinkage, good chemical stability, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/24B01J19/00C07D301/12C07D303/08
CPCB01J19/2415B01J19/242B01J19/0093B01J19/0053C07D301/12C07D303/08B01J2219/00792B01J2219/00797B01J2219/00867B01J2219/00889B01J2219/00961
Inventor 徐林黄杰军丁克鸿徐志斌徐文轩钱赟庞诗卉
Owner JIANGSU YANGNONG CHEM GROUP
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