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2005•Journal of Petrochemical UniversitiesRequires access

SELECTIVE ALLKYLATION OF PHENOL WITH tert-BUTYL ALCOHOL CATALYZED SO_3H-FUNCTIONALIZED IONIC LIQUID

Zhaolin Sun

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Abstract

Alkylation reaction of phenol with tert-butyl alcohol (TBA) catalyzed by SO_3H-functionalized ionic liquids was investigated. The influences of different ionic liquids, reaction time, reaction temperature, reactant ratio (mole ratio of phenol to that of TBA), the amount of ionic liquid added on the alkylation reaction and the recycle of ionic liquid were studied. The conversion of phenol and the selectivity of 2,4-DTBP are 80.4% and 60.2% respectively under optimum reaction condition (mole ratio of phenol to TBA is 1∶2, n(IL)=15 mmol,n(phenol)=10 mmol, T=343 K,t=8 h). The activity of ionic liquid is not changed when it is repeatedly used for 3 times. At the same time, the reaction mechanism was discussed based on the distribution of products.

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What this paper is about

Alkylation reaction of phenol with tert-butyl alcohol (TBA) catalyzed by SO_3H-functionalized ionic liquids was investigated. The influences of different ionic liquids, reaction time, reaction temperature, reactant ratio (mole ratio of phenol to that of TBA), the amount of ionic liquid added on the alkylation reaction and the recycle of ionic liquid were studied. The conversion of phenol and the selectivity of 2,4-DTBP are 80.4% and 60.2% respectively under optimum reaction condition (mole ratio of phenol to TBA is 1∶2, n(IL)=15 mmol,n(phenol)=10 mmol, T=343 K,t=8 h). The activity of ionic liquid is not changed when it is repeatedly used for 3 times. At the same time, the reaction mechanism was discussed based on the distribution of products.

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Available abstract

Alkylation reaction of phenol with tert-butyl alcohol (TBA) catalyzed by SO_3H-functionalized ionic liquids was investigated. The influences of different ionic liquids, reaction time, reaction temperature, reactant ratio (mole ratio of phenol to that of TBA), the amount of ionic liquid added on the alkylation reaction and the recycle of ionic liquid were studied. The conversion of phenol and the selectivity of 2,4-DTBP are 80.4% and 60.2% respectively under optimum reaction condition (mole ratio of phenol to TBA is 1∶2, n(IL)=15 mmol,n(phenol)=10 mmol, T=343 K,t=8 h). The activity of ionic liquid is not changed when it is repeatedly used for 3 times. At the same time, the reaction mechanism was discussed based on the distribution of products.

Key concepts: Ionic liquid, Phenol, Chemistry, Alkylation, Catalysis, tert-Butyl alcohol, Alcohol, Selectivity

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SELECTIVE ALLKYLATION OF PHENOL WITH tert-BUTYL ALCOHOL CATALYZED SO_3H-FUNCTIONALIZED IONIC LIQUID — Research Paper | ScholarLens