Effects of Assistant Solvents and Mixing Intensity on the Bromination Process of Butyl Rubber

doi:10.1016/S1004-9541(14)60052-5

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (4): 398-404.DOI: 10.1016/S1004-9541(14)60052-5

• 催化、动力学与反应工程 • 上一篇下一篇

Effects of Assistant Solvents and Mixing Intensity on the Bromination Process of Butyl Rubber

王伟^1,2, 邹海魁^1,, 初广文^1,2, 向阳¹, 彭晗¹, 陈建峰^1,2

1 Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
2 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China

收稿日期:2013-07-10 修回日期:2013-12-19 出版日期:2014-04-28 发布日期:2014-04-04
通讯作者: ZOU Haikui, CHEN Jianfeng
基金资助:
Supported by the National Natural Science Foundation of China (21176014, 20990221, 21121064) and the Science-Technology Project for Supervisors of Excellent Doctor Degree Thesis of Beijing (20111001001).

Effects of Assistant Solvents and Mixing Intensity on the Bromination Process of Butyl Rubber

WANG Wei^1,2, ZOU Haikui^1,, CHU Guangwen^1,2, XIANG Yang¹, PENG Han¹, CHEN Jianfeng^1,2

1 Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
2 State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China

Received:2013-07-10 Revised:2013-12-19 Online:2014-04-28 Published:2014-04-04
Supported by:
Supported by the National Natural Science Foundation of China (21176014, 20990221, 21121064) and the Science-Technology Project for Supervisors of Excellent Doctor Degree Thesis of Beijing (20111001001).

摘要/Abstract

摘要： A slow bromination process of butyl rubber (IIR) suffers from low efficiency and low selectivity (S) of target-product. To obtain suitable approach to intensify the process, effects of assistant solvents and mixing intensity on the bromination process were systemically studied in this paper. The reaction process was found constantly accelerated with the increasing dosage and polarity of assistant solvent. Hexane with 30% (by volume) dichloromethane was found as the suitable solvent component, where the stable conversion of 1,4-isoprene transferring to target product (x_A1s) of 80.2% and the corresponding S of 91.2% were obtained in 5 min. The accelerated reaction process was demonstrated being remarkably affected by mixing intensity until the optimal stirring rate of 1100 r·min^-1 in a stirred tank reactor. With better mixing condition, a further intensification of the process was achieved in a rotating packed bed (RPB) reactor, where x_A1s of 82.6% and S of 91.9% were obtained in 2 min. The usage of the suitable solvent component and RPB has potential application in the industrial bromination process intensification.

关键词: bromination of butyl rubber, process intensification, assistant solvent, mixing intensity

Abstract: A slow bromination process of butyl rubber (IIR) suffers from low efficiency and low selectivity (S) of target-product. To obtain suitable approach to intensify the process, effects of assistant solvents and mixing intensity on the bromination process were systemically studied in this paper. The reaction process was found constantly accelerated with the increasing dosage and polarity of assistant solvent. Hexane with 30% (by volume) dichloromethane was found as the suitable solvent component, where the stable conversion of 1,4-isoprene transferring to target product (x_A1s) of 80.2% and the corresponding S of 91.2% were obtained in 5 min. The accelerated reaction process was demonstrated being remarkably affected by mixing intensity until the optimal stirring rate of 1100 r·min^-1 in a stirred tank reactor. With better mixing condition, a further intensification of the process was achieved in a rotating packed bed (RPB) reactor, where x_A1s of 82.6% and S of 91.9% were obtained in 2 min. The usage of the suitable solvent component and RPB has potential application in the industrial bromination process intensification.

Key words: bromination of butyl rubber, process intensification, assistant solvent, mixing intensity

王伟, 邹海魁, 初广文, 向阳, 彭晗, 陈建峰. Effects of Assistant Solvents and Mixing Intensity on the Bromination Process of Butyl Rubber[J]. Chinese Journal of Chemical Engineering, 2014, 22(4): 398-404.

WANG Wei, ZOU Haikui, CHU Guangwen, XIANG Yang, PENG Han, CHEN Jianfeng. Effects of Assistant Solvents and Mixing Intensity on the Bromination Process of Butyl Rubber[J]. Chin.J.Chem.Eng., 2014, 22(4): 398-404.

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Effects of Assistant Solvents and Mixing Intensity on the Bromination Process of Butyl Rubber

Effects of Assistant Solvents and Mixing Intensity on the Bromination Process of Butyl Rubber

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