Method for synthesizing cresol
A synthetic method, the technology of cresol, applied in the field of production of fine chemical raw material intermediates, can solve the problems of high side reactions, achieve the effects of less side reactions, increased consumption of hydrochloric acid, and reduced emissions
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[0014] The invention provides a synthetic method of cresol, comprising producing chlorotoluene by chlorination of toluene, controlling the reaction conversion rate at 95-98% by chlorination of toluene, and producing a product composed of p-chlorotoluene, o-chlorotoluene and m-chlorotoluene The mixed chlorotoluene, the mixed chlorotoluene is hydrolyzed with 3 times the volume of liquid alkali, and the reaction conversion rate of the mixed chlorotoluene is controlled to be 95-98%. After the reaction product is cooled, it is separated, neutralized and layered, extracted, and distilled. , rectification, and tert-butylation make o-cresol, m-cresol and p-cresol respectively, and the specific process steps are as follows:
[0015] (1) High temperature and high pressure hydrolysis process
[0016] 1) Preparation before feeding: replace the material with water and enter the high-pressure reactor with a large flow rate through the high-pressure metering pump. When water flows out of the...
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