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Date of Publication:2022-10-06

Journal:石油学报 石油加工

Issue:1

Page Number:115-121

ISSN No.:1001-8719

Abstract:SO3H-functionalized ionic liquids (IL) were synthesized by using tri-alkylamine and 1, 4-butanesultone as the sources. The structures and physical properties of ILs were characterized by NMR, ESI-MS and TG-DTG. Their catalytic performances in the alkylation of catechol with tert-butyl alcohol (TBA) were investigated. The influences of reaction temperature, reaction time, reactant ratio, the amount and the recycle times of IL on the catalytic performance of IL in the tert-butylation of catechol were studied. Meanwhile, the catalytic performance of IL was compared with that of conventional liquid acids and solid acids. The results indicated that under optimized reaction conditions of 150°C, 3 h, n(Catechol):n(TBA):n(IL) was 2:1:0.1, the conversion of catechol and the selectivity of 4-TBC were 41.5% and 97.1% respectively. The SO3H-functionlized ionic liquid exhibited high catalytic activity in the alkylation of catechol with TBA, which was similar to liquid acid. The possible mechanism for this reaction system was discussed based on the reaction results and the simulation calculated results.

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