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Homogeneous catalysis low boiling point olefin hydrogen peroxide continuous reaction method and system

A homogeneous catalysis, low boiling point technology, used in organic chemistry methods, chemical instruments and methods, organic chemistry, etc., can solve problems such as pollution, low reaction system efficiency, and co-product environment.

Inactive Publication Date: 2006-05-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

At present, except that ethylene oxide can be directly produced by air oxidation of ethylene, the production methods of epoxy compounds of other olefins are prepared by indirect oxidation method, chlorohydrin method or peracid method, and there are co-products and environmental pollution respectively. And other issues
Hydrogen peroxide is a very clean oxygen source. In recent years, there have been many studies on catalyzing the epoxidation of olefins with hydrogen peroxide as the oxygen source. In the system, a large amount of polar organic solvent is required to suppress the side effects of water, therefore, the efficiency of the reaction system is relatively low, and it is difficult to realize industrial application

Method used

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  • Homogeneous catalysis low boiling point olefin hydrogen peroxide continuous reaction method and system

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example 1

[0022] Example 1. Add 2.5 kg of hydrogen peroxide with a concentration of 30% to the reactor 1 of preloaded 70L solvent (tributyl phosphate and benzene mixed solvent) and 300g of catalyst through pipeline 101, heat up to 80°C, and pass the added hydrogen peroxide through benzene The water is taken out of the system through the pipeline 104, passes through the first condenser 2 (the temperature of the first condenser 2 is 50° C.), enters the water-oil separator 4, and benzene flows back into the reactor 1 through the pipeline 107. Then, be warming up to 85 ℃, control the flow rate of isobutylene to be 30.3mol / h, the flow rate 2kg / h of the hydrogen peroxide of 30% concentration, enter reactor 1 through pipeline 102 and 101 respectively, unreacted olefin, the epoxide of generation, Water and benzene enter rectification tower 3 through pipeline 104, and unreacted olefins pass through pipeline 108 from rectification tower 3 to the third condenser 2" (the temperature of this condense...

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Abstract

The oxidizing continuous reaction method by homogeneous catalysing lower-boiling olefin hydrogen peroxide uses the azeotropy of water and constituents in reaction liquid to remove most water and increase epoxide yield and realize continuity; the catalyst needs not to separate and can recycle. The reaction system comprises mainly: a reactor, a condenser, a rectification tower, an oil-water separator, and a gasifier. Wherein, it uses thermal energy of reaction self and benzene solution to distill off the residual material.

Description

technical field [0001] The invention relates to a reaction system for continuous production of epoxy compounds by epoxidation of low-boiling olefins with hydrogen peroxide, which belongs to the technology of continuously producing epoxy compounds by oxidizing low-boiling olefins and hydrogen peroxide as raw materials and using heteropolytungstophosphate as a catalyst. Background technique [0002] Epoxy compounds are very important organic intermediates. At present, except that ethylene oxide can be directly produced by air oxidation of ethylene, the production methods of epoxy compounds of other olefins are prepared by indirect oxidation method, chlorohydrin method or peracid method, and there are co-products and environmental pollution respectively. And other issues. Hydrogen peroxide is a very clean oxygen source. In recent years, there have been many studies on catalyzing the epoxidation of olefins with hydrogen peroxide as the oxygen source. In the system, a large amo...

Claims

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Application Information

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IPC IPC(8): C07B41/00C07D301/19C07D305/00
Inventor 高爽李萌吕迎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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