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Epichlorohydrin production process

A technology of epichlorohydrin and production process, applied in the direction of organic chemistry, etc., can solve the problems of unfavorable epichlorohydrin production, small effective volume of the reaction kettle, large volume of the reaction kettle, etc. Good mass and heat transfer effect, the effect of simplifying the separation process

Inactive Publication Date: 2006-05-10
HUNAN BAILI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production process adopts direct epoxidation of hydrogen peroxide, which can solve the corrosion and pollution problems existing in the chlorohydrin process, but the volume of the reactor is large, the effective volume of the reactor is small, the process is long, and the investment is still high, which is not conducive to epoxy chlorine. Propane production

Method used

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  • Epichlorohydrin production process

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Effect test

Embodiment 1

[0017] The catalyst is titanium-silicon molecular sieve, the particle size range is 200 μm to 0.5 μm, and the reaction raw materials are 27.5% industrial hydrogen peroxide and industrial chloropropene with a content of more than 97%. The amount of catalyst used is 1% of the weight of allyl chloride, and the temperature is raised to 45°C under normal pressure, and allyl chloride and hydrogen peroxide are added in a molar ratio of 2:1, and the mass space velocity of allyl chloride is 2.0h -1 . Results: The conversion rate of hydrogen peroxide was 100%, and the selectivity of hydrogen peroxide epoxidation was 95.5%.

Embodiment 2

[0019] The catalyst is titanium-silicon molecular sieve, the particle size range is 200 μm to 0.5 μm, and the reaction raw materials are 27.5% industrial hydrogen peroxide and industrial chloropropene with a content of more than 97%. The amount of catalyst used is 1% of the weight of allyl chloride, the temperature is raised to 65°C under normal pressure, and allyl chloride and hydrogen peroxide are added in a molar ratio of 2:1, and the mass space velocity of allyl chloride is 2.5h -1 . The gas-liquid ratio of the feed is 1.5-6:1. Results: The conversion rate of hydrogen peroxide was 100%, and the selectivity of hydrogen peroxide epoxidation was 95%.

Embodiment 3

[0021] The catalyst is titanium-silicon molecular sieve, the particle size range is 200 μm to 0.5 μm, and the reaction raw materials are 27.5% industrial hydrogen peroxide and industrial chloropropene with a content of more than 97%. The amount of catalyst used is 1% of the weight of allyl chloride, the temperature is raised to 60° C. under a pressure of 0.15 MPa (absolute pressure), and allyl chloride and hydrogen peroxide are added in a molar ratio of 2:1, and the mass space velocity of allyl chloride is 1.5 h. The gas-liquid ratio of the feed is 1.5-6:1. Results: The conversion rate of hydrogen peroxide was 100%, and the selectivity of hydrogen peroxide epoxidation was 96%.

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Abstract

The invention discloses a process for producing epichlorohydrin, which comprises proportioning chloropropene and titanium-silicon molecular sieve catalyst, charging into helical channel type revolving beds or rotary filling bed hypergravity reactor, continuously charging liquid phase or gas phase chloropropene and hydrogen peroxide solution simultaneously for direct epoxidation reaction, the non-reacted chloropropene and a small amount of produced gas condensating and returning proportioning tank for continuing use, the slurry in the reactor flowing into the proportioning tank, pressurizing part of the materials and circulating into the reactor, loading part of the materials into separator, loading the separated crude epichlorohydrin for refining, and returning slurry containing catalyst to proportioning tank for later use again.

Description

1. Technical field [0001] The invention relates to a production process of epichlorohydrin, in particular to a process for preparing epichlorohydrin by direct catalytic epoxidation of allyl chloride and hydrogen peroxide under the action of a supergravity field. 2. Background technology [0002] Epichlorohydrin is an important basic organic chemical raw material and intermediate. Epichlorohydrin is widely used in the synthesis of epoxy resin, glycerin, ammonia alcohol rubber, medicine, etc. , pesticides, surfactants, ion exchange resins and plasticizers, etc., are the third largest epoxy compounds in output after ethylene oxide and propylene oxide. At present, epichlorohydrin is produced from propylene, and the production processes mainly include propylene high-temperature chlorination method and propylene acetate method. The high-temperature chlorination of propylene is the main method for the industrial production of epichlorohydrin, with mature technology and flexible pr...

Claims

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Application Information

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IPC IPC(8): C07D301/12C07D303/08
Inventor 周继承肖立明罗和安曾令平赵虹刘敏
Owner HUNAN BAILI TECH DEV
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