Process for preparing 4-vinyl epoxycyclohexane

Abstract

The invention relates to a preparation method of 4-vinyl epoxy cyclohexane, the main raw materials are 4-vinyl cyclohexene and hydrogen peroxide, and the raw material for preparing 4-vinyl epoxy cyclohexane is 4-vinyl cyclohexane Hexene 20%-28%, H2O2 11%-19%, Catalyst 0.52%-1.10%, Solvent 54%-65%, measured in proportion Put 4-vinylcyclohexene, catalyst, solvent in the reactor , and stir, slowly add hydrogen peroxide, and control the reaction temperature at 45-70°C. After the hydrogen peroxide has completely reacted, cool the solution to below 25°C, filter the cooled solution, separate the catalyst, and perform a polishing process on the filtered solution. Distillation to separate the incompletely reacted 4-vinyl cyclohexene and the solvent, the solution that has been rectified once is subjected to secondary rectification, and the reaction by-products and other impurities are separated to obtain the finished product 4-vinyl epoxy cyclohexene Alkanes, through the test, the product yield of this production method can reach about 90%, the selectivity is 86-98%, the product content is ≥ 98.5%, and no pollutants are produced. It is a green and environmentally friendly production technology.

Description

technical field [0001] The invention relates to a production method for synthesizing epoxides by direct oxidation of olefins, in particular to a preparation method for 4-vinyl epoxycyclohexane. Background technique [0002] 4-Vinyl epoxycyclohexane is an important fine chemical intermediate, and a chemical product with lively properties and wide uses in the epoxy series products. It is widely used in the production of luminescent materials, organic silicon monomer synthesis, electronic chip encapsulants, adhesives, coupling agents, microelectronics and other industries and fields. It is one of the key promotion projects of the national 863 plan. At present, there is no According to literature reports about the production and use of 4-vinyl epoxycyclohexane, there are only a small number of foreign companies producing it, but the products they produce have low selectivity, many by-products, and low product content. Contents of the invention [0003] The purpose of the pres...

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Problems solved by technology

It is widely used in the production of luminescent materials, organic silicon monomer synthesis, electronic chip encapsulants, adhesives, coupling agents, microelectronics and other industries and fields. It is one of the key promotion projects of the national 863 plan. At present, there is no Regarding the literature reports on the production and use of 4-vinyl epoxycyclohexane, there are only a few foreign companies producing it, but the products they produce have low selectivity, many by-products, and low product content.

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