Method of producing methylphenol by gas-phase alkylation of phenol and methanol

A technology of alkylation and methanol, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as environmental pollution and equipment corrosion
CN103570504AActive Publication Date: 2014-02-12DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2014-02-12

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Abstract

The invention relates to a method of producing methylphenol by gas-phase alkylation of phenol and methanol. The phenol and the methanol after being preheated are mixed with a diluent gas, pass continuously through a catalyst bed layer of the phenol-methanol alkylation, and are subjected to a gas-phase reaction at a temperature of 200-500 DEG C and at a feed weight hourly space velocity of 0.5-20 h<-1> to produce the methylphenol. A phenol-methanol alkylation catalyst is prepared by modification using MCM-22, ZSM-5 and a beta molecular sieve as active components. The phenol and the methanol are used as raw materials. The methylphenol selectivity can reach 90%, and the para-position selectivity can reach 58%. The catalyst is good in stability. Producing processes are free from equipment corrosion. The catalyst is environmental friendly and has a good industrial application prospect.
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Description

technical field

[0001] The invention relates to a method for producing cresol, in particular to a method for producing cresol by vapor-phase alkylation of phenol and methanol. Background technique

[0002] p-cresol is a colorless liquid or crystal with a special smell, corrosive and toxic, insoluble in water, easily soluble in alkaline solution or toluene, ethanol and other organic solvents, is an important fine chemical raw material, widely used in Antioxidants, dyes, pharmaceuticals, pesticides, spices and other industries. o-cresol, also known as: 2-cresol, o-cresol is an important fine chemical intermediate for the synthesis of pesticides, medicines, dyes, synthetic resins, spices, antioxidants, etc. m-cresol, also known as 3-cresol, m-cresol, and m-cresol, are mainly used as pesticide intermediates to produce insecticides such as fenitrothion, fenthion, medicarb, and permethrin. Intermediates for color films, resins, plasticizers and fragrances. Coal tar phenol conta...

Claims

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