Method for preparing p-tert octyl phenol

A technology of tertoctylphenol and phenol, which is applied in the field of preparation of p-tertoctylphenol, achieves good application prospects, overcomes the difficulties of separation and treatment, and overcomes the effect of high cost

Active Publication Date: 2008-04-16
RACHEM CHINA CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects of the existing p-tertoctylphenol, and to provide a method of using C 4 The distillate addition mixture is used as the raw material to obtain isobutene dimer through sulfuric

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  • Method for preparing p-tert octyl phenol
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  • Method for preparing p-tert octyl phenol

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Example Embodiment

[0019] Example 1. Preparation method of p-tertylphenol

[0020] By adopting the method for preparing p-tertylphenol of the present invention, the sulfuric acid esterified and heated degassing content of C in the synthetic rubber factory is about 80% 4 The addition mixture (by-product) is the raw material; the isobutylene dimer with the target distillate content> 98% obtained by distilling at 75℃-105℃ is used as the alkylating agent; using Na-type sulfonated styrene-ethylene dimer Alkene copolymer strong basic anion exchange resin, which is converted into H-type sulfonated styrene-vinylidene copolymer strong acid cation exchange resin by acidification, which acts as an alkylation catalyst and reacts with phenol at 100°C. , The alkylation mixture is distilled and cut at 220°C-270°C to obtain p-tertylphenol.

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Abstract

The invention provides a method for preparing 4-tert-octylphenol. The C4 fraction addition mixture with 80 percent of isobutene dimer remained by esterification-degasification of sulfuric acid is taken as the raw material ; after the raw material is braized and cut under the temperature between 75 DEG C and 105 DEG C, the isobutene dimmer that the content of the target distillate is more than 98 percent is obtained to be taken as the alkylating agent; Na-type sulfonated styrol-butadiene polymer strong base anion-exchange resin with 50 percent of water is acidified to a H-type sulfonated styrol-butadiene polymer strong acid cation-exchange resin as the alkylation catalyst; the target distillate isobutene dimmer and the phenol are made a alkylation reaction under the temperature between 90 DEG C and 100 DEG C with the H-type sulfonated styrol-butadiene polymer strong acid cation-exchange resin as the catalyst to produce the 4-tert-octylphenol alkylation mixing liquid; the alkylation mixing liquid is braized and cut under the temperature between 220 DEG C and 270 DEG C to produce the 4-tert-octylphenol.

Description

technical field [0001] The present invention relates to the general method of organic chemistry, particularly refers to a kind of 4 The invention discloses a method for preparing p-tert-octylphenol from a fraction addition mixture as a raw material. Background technique [0002] The traditional preparation of p-tert-octylphenol is made by using isobutylene dimer as an alkylating agent to carry out alkylation reaction with phenol under acid catalysis. And adopt clay, sulfuric acid or strongly acidic cation exchange resin as the alkylation catalyst in the alkylation reaction, use clay as the alkylation catalyst to exist the separation and the very difficult difficult problem of processing of the clay after the alkylation reaction; The use of sulfuric acid as an alkylation catalyst has the disadvantage that the water-containing alkylated emulsified mucus formed by neutralization after alkylation is difficult to complete the separation of brine. Although the commercially avail...

Claims

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Application Information

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IPC IPC(8): C07C39/06C07C37/11
Inventor 蒲启君宋修信虞明珍
Owner RACHEM CHINA CO LTD
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