O-tert-pentylphenol production process

Abstract

An o-tert-pentylphenol production process adopts aluminum phenoxide as catalyst and performs alkylation of phenol and isoamylene under a certain temperature and pressure to synthesize o-tert-pentylphenol. The reaction temperature is 100-180 DEG C, the reaction time is 5.0-7.0h and the weight percent of aluminum phenoxide to phenol is 0.01%-1.0%. The catalyst has good catalytic activity, the once-through yield of the product is more than 80%, the phenol conversion rate is more than 90% and the product purity is more than 99.5%. The alkylation reaction solution is sent to a rectification systemafter catalyst deactivation and treatment; the product o-tert-pentylphenol can be obtained through refinement and separation, the residual residue can be reacted with isoamylene continuously in the present of catalyst to produce 2,4-di-tert-pentylphenol and the whole process does not generate environmental pollution. By adopting the process to produce o-tert-pentylphenol, the equipment investmentis small, the process flow is short, the material and energy consumptions are low, the production cost is low and the quality is stable, thus the process is applicable to the industrialized production.

Description

technical field

[0001] The invention belongs to fine chemical industry, in particular to the production process of alkylphenol Background technique

[0002] Alkylphenols are generally produced by the alkylation reaction of phenol and alkylating agents (such as olefins, ethers, alcohols, etc.) in the presence of catalysts. The production process of o-tert-amylphenol has no literature and patent reports at present. According to the principle of alkylation reaction, under certain catalyst and process conditions, react with phenol and isopentene, and by adjusting the reaction temperature, reaction pressure, raw material ratio and other conditions, a certain content of o-tert-amylphenol alkylation liquid can be obtained , High-purity products can be obtained through refining and separation. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a production process for o-tert-amylphenol, select a suitable catalyst, and sel...

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