Method for catalytically synthesizing paraethyl phenol

A technology for ethyl phenol and phenol, applied in the field of catalytic synthesis of p-ethyl phenol, can solve the problems of affecting catalyst stability, low product quality, low stability, etc., and achieves convenient product separation, high raw material activity, and warm reaction conditions. Effect
CN101792371AActive Publication Date: 2010-08-04溧阳常大技术转移中心有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
溧阳常大技术转移中心有限公司
Publication Date
2010-08-04
Patent Text Reader

Abstract

The invention relates to a method for catalytically synthesizing paraethyl phenol, which is characterized by taking diethyl carbonate and phenol as the raw materials and taking the modified microporous molecular sieve MCM-22, ZSM-5 or HY as a catalyst to carry out catalytic reaction under the following conditions: the reaction temperature is 200-350 DEG C, the mole ratio of diethyl carbonate to phenol is 1:2-2:1 and the mass space velocity is 1-12h<-1>. By the method, good raw material conversion rate and target product selectivity can be obtained. Under the best conditions, the conversion rate of phenol can reach 100% and the selectivity of paraethyl phenol can reach 82.2%. The method in which the modified microporous molecular sieve MCM-22, ZSM-5 or HY is taken as the catalyst and diethyl carbonate is taken as the alkylating agent to react with phenol to catalytically synthesize paraethyl phenol has the advantages of high raw material activity, mild reaction conditions, simple process, convenient product separation, good selectivity of the target product paraethyl phenol, etc.
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Description

technical field

[0001] The invention relates to a method for catalytically synthesizing p-ethylphenol, in particular to a method for catalytically synthesizing p-ethylphenol with modified microporous molecular sieves. Background technique

[0002] p-Ethylphenol is widely used as an important raw material for the production of phenolic resins, rubber anti-aging agents, surfactants, etc., and is also an important intermediate for the production of spices and pesticides. The synthetic method of p-ethylphenol mainly contains following several kinds:

[0003] (1) Natural separation method

[0004] The natural separation method is the traditional preparation method of p-ethylphenol, but due to limited resources and complicated separation process in recent years, the devices for natural separation and preparation of p-ethylphenol have been continuously shut down and replaced by chemical synthesis.

[0005] (2) Ethylaniline diazotization hydrolysis method

[0006] The method is t...

Claims

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