Kinetics of the Mono-esterification Between Terephthalic Acid and 1,4-Butanediol

CIESC Journal ›› 2010, Vol. 18 ›› Issue (3): 391-396.

Kinetics of the Mono-esterification Between Terephthalic Acid and 1,4-Butanediol

田文玉¹, 曾作祥², 薛为岚², 李应宾², 章添钰²

1. Department of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China;
2. Institute of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

收稿日期:2009-11-23 修回日期:2010-05-06 出版日期:2010-06-28 发布日期:2010-06-28
通讯作者: ZENG Zuoxiang,E-mail:zengzx@ecust.edu.cn

Kinetics of the Mono-esterification Between Terephthalic Acid and 1,4-Butanediol

TIAN Wenyu¹, ZENG Zuoxiang², XUE Weilan², LI Yingbin², ZHANG Tianyu²

1. Department of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China;
2. Institute of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2009-11-23 Revised:2010-05-06 Online:2010-06-28 Published:2010-06-28

摘要/Abstract

摘要： The chemical kinetics of the monoesterification between terephthalic acid(TPA)and 1,4-butanediol (BDO)catalyzed by a metallo-organic compound was studied using the initial rate method.The experiments were carried out in the temperature range of 463-483 K,and butylhydroxyoxo-stannane(BuSnOOH)and tetrabutyl titanate[Ti(OBu)₄] were used as catalyst respectively.The initial rates of the reaction catalyzed by BuSnOOH or Ti(OBu)₄ were measured at a series of initial concentrations of BDO(or TPA) with the concentration of TPA(or BDO)kept constant.The reaction orders of reagents were determined by the initial rate method.The results indicate that the reaction order for TPA is related with the species of catalyst and it is 2 and 0.7 for BuSnOOH and Ti(OBu)₄ respectively.However,the order for BDO is the same 0.9 for the two catalysts.Furthermore,the effects of temperature and catalyst concentration are investigated,and the activation energies and the reaction rate constants for the two catalysts were determined.

关键词: esterification, 1,4-butanediol, terephthalic acid, kinetics

Abstract: The chemical kinetics of the monoesterification between terephthalic acid(TPA)and 1,4-butanediol (BDO)catalyzed by a metallo-organic compound was studied using the initial rate method.The experiments were carried out in the temperature range of 463-483 K,and butylhydroxyoxo-stannane(BuSnOOH)and tetrabutyl titanate[Ti(OBu)₄] were used as catalyst respectively.The initial rates of the reaction catalyzed by BuSnOOH or Ti(OBu)₄ were measured at a series of initial concentrations of BDO(or TPA) with the concentration of TPA(or BDO)kept constant.The reaction orders of reagents were determined by the initial rate method.The results indicate that the reaction order for TPA is related with the species of catalyst and it is 2 and 0.7 for BuSnOOH and Ti(OBu)₄ respectively.However,the order for BDO is the same 0.9 for the two catalysts.Furthermore,the effects of temperature and catalyst concentration are investigated,and the activation energies and the reaction rate constants for the two catalysts were determined.

Key words: esterification, 1,4-butanediol, terephthalic acid, kinetics

田文玉, 曾作祥, 薛为岚, 李应宾, 章添钰. Kinetics of the Mono-esterification Between Terephthalic Acid and 1,4-Butanediol[J]. CIESC Journal, 2010, 18(3): 391-396.

TIAN Wenyu, ZENG Zuoxiang, XUE Weilan, LI Yingbin, ZHANG Tianyu. Kinetics of the Mono-esterification Between Terephthalic Acid and 1,4-Butanediol[J]. , 2010, 18(3): 391-396.

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Kinetics of the Mono-esterification Between Terephthalic Acid and 1,4-Butanediol

Kinetics of the Mono-esterification Between Terephthalic Acid and 1,4-Butanediol

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