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Continuous reaction method for catalyzing epoxidation of hydrogen peroxide oxyalkylene

A technology for oxidizing olefins and hydrogen peroxide, applied in chemical recovery, organic chemistry, etc., can solve problems such as complex reaction systems and difficult balance

Inactive Publication Date: 2015-06-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

CN100412038C discloses a continuous reaction method and system for homogeneously catalyzed low-boiling olefin hydrogen peroxide oxidation, and its reaction system is relatively complicated and difficult to balance

Method used

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Examples

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example 1

[0016] Example 1. Add 100 kg of hydrogen peroxide with a concentration of 50% to the first reactor preloaded with 950 kg of solvent (tributyl phosphate and toluene mixed solvent), raise the temperature to 80°C, and take out the water in the added hydrogen peroxide through toluene The system, through the condenser, enters the water-oil separator, and the toluene flows back to the first reactor. After the water separation rate is greater than 98%, the system material enters the second reactor. The reaction temperature of the second reactor is 50 ° C. Add 14.5 kg of catalyst, fill in 250 kg of butene, and react for 5 hours. After the reaction, the material enters the third reaction The material was cooled to 15°C, and the catalyst was separated twice through a decanter centrifuge and a butterfly separator for recycling. The liquid phase after centrifugation was further rectified to separate products and materials, and 74.1 kg of butylene oxide was obtained. The yield of butylene ...

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PUM

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Abstract

The invention discloses a continuous reaction method for catalyzing the epoxidation of hydrogen peroxide oxyalkylene. The method comprises the following steps: carrying out azeotropic treatment on water and components (solvent) in reaction liquid so as to remove most of water (water in hydrogen peroxide) in a system and then form an anhydrous hydrogen peroxide solution; adding olefin and a phase transfer catalyst, carrying out epoxidation reaction at certain temperature, and cooling the obtained object; and separating and recovering the catalyst for two times by using a horizontal screw decanter centrifuge and a butterfly separator, wherein the catalyst can be recycled; and carrying out further rectification and separation on a liquid phase obtained by separating, so as to obtain a product; and recycling a mixed solvent again.

Description

technical field [0001] The invention relates to a continuous reaction process for catalyzing hydrogen peroxide to oxidize olefins and belongs to the technology of producing epoxy compounds by catalytic epoxidation with small molecule olefins and hydrogen peroxide as raw materials and a phase transfer 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. [0003] In 1988, Carlo Venturello et al first reported the epoxidation reaction of olefins catalyzed by heteropolyacid quaternary ammonium salt, during the reaction process heteropolyacid quaternary ammonium salt [R 4 N + ] 3 {PO 4 [WO(O 2 ) 2 ] 4} 3- As the...

Claims

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Application Information

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IPC IPC(8): C07D301/12C07D303/04C07D303/48
CPCY02P20/584C07D301/12C07D303/04C07D303/48
Inventor 高爽张恒耘张毅李军吕迎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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