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

辅助溶剂与混合强度对丁基橡胶溴化过程的影响(英文)

作　　者：王伟 邹海魁 初广文 向阳 彭晗 陈建峰 

机构地区：[1]Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology [2]State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology

出　　处：《Chinese Journal of Chemical Engineering》2014年第4期398-404,共7页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21176014,20990221,21121064);the Science-Technology Project for Supervisors of Excellent Doctor Degree Thesis of Beijing(20111001001)

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 inten-sity 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） dichloro-methane was found as the suitable solvent component, where the stable conversion of 1,4-isoprene transferring to target product （xA1s） 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＆#183;min-1 in a stirred tank reactor. With better mixing condition, a further intensification of the process was achieved in a ro-tating packed bed （RPB） reactor, where xA1s 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.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 inten-sity 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) dichloro-methane was found as the suitable solvent component, where the stable conversion of 1,4-isoprene transferring to target product(xA1s) 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 ro-tating packed bed(RPB) reactor, where xA1s 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 intensitication assistant solvent mixing intensity 

分 类 号：TQ333.6[化学工程—橡胶工业]