Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (10): 1430-1436.DOI: 10.19894/j.issn.1000-0518.230105

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Polyallylamine Modified Sulfonic Acid Catalyst Catalyse Synthesis of n-Butyl Benzoate

Ya-Zhou YU1, Xian-Liang ZHAO1(), Ning-Ning TAN1, Yang XIAO1, Yong-Jun ZHANG2()   

  1. 1.School of Biological and Chemical Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,China
    2.Zhejiang Wild Wind Pharmaceutical Co. Ltd. ,Dongyang 322100,China
  • Received:2023-04-13 Accepted:2023-08-21 Published:2023-10-01 Online:2023-10-13
  • Contact: Xian-Liang ZHAO,Yong-Jun ZHANG
  • About author:xlzhao@zust.edu.cn

Abstract:

Developing polymer carrier catalysts is an important topic for effectively addressing catalyst utilization and green synthetic chemistry. As a monomer, allylamine hydrochloride is polymerized with initiation to obtain polyallylamine which is cross-linked with epichlorohydrin to obtain cross-linked polyallylamine hydrochloride. Using cross-linked polyallylamine as a carrier, a solid acid catalyst with high loading is prepared by reacting with chlorosulfonic acid.The cross-linked polyallylamine sulfonic acid catalyst is stable up to 150 ℃, indicating its excellent thermal stability. This catalyst is used to catalyze the reaction of benzoic acid and n-butanol to produce n-butyl benzoate. The optimal reaction conditions are: the molar ratio of n-butanol to benzoic acid of 2∶1, the catalyst dosage of 20 g/mol BA, reaction temperature of 120 ℃ and reaction time of 6 h. The esterification rate of benzoic acid is 95%. This catalyst can be reused up to 4 times while maintaining high catalytic performance.

Key words: Polymer supporter, Polyallylamine, Sulfonic acid, n-Butyl benzoate

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