氯代烷烃促进剂对钛系聚乙烯催化剂的影响
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摘要
以氯代烷烃化合物为促进剂制备了新型钛系聚乙烯催化剂BCE,并与参比催化剂进行对比。考察了氯代烷烃化合物对BCE催化剂的粒径及其分布、催化活性、氢调敏感性和制得的聚合物性能的影响。实验结果表明,含二氯乙烷的BCE催化剂的粒径及其分布与参比催化剂接近,在相同的聚合条件下,聚合活性高于参比催化剂;二氯乙烷的加入可提高BCE催化剂的氢调敏感性;含二氯乙烷的BCE催化剂制得的聚合物的熔体流动指数大于参比催化剂制得的聚合物,且相对分子质量分布更宽。
A series of titanium-based polyethylene catalysts BCE were prepared with chloralkanes as promoters and were compared with a referenced catalyst.The effects of the chloralkanes on the particle size of catalyst and its distribution,the catalytic activity,the hydrogen responsibility,and the performance of the polymer were investigated.The results indicated that the particle size of BCE catalyst containing dichloroethane and its distribution approximated to the referenced catalyst,while under the same polymerization condition,BCE catalyst containing dichloroethane exhibited higher activity.Dichloroethane could help to increase the hydrogen responsibility of BCE catalyst.The melt index of polymer prepared with BCE catalyst containing dichloroethane is higher than that of polymer prepared with the referenced catalyst.
A series of titanium-based polyethylene catalysts BCE were prepared with chloralkanes as promoters and were compared with a referenced catalyst.The effects of the chloralkanes on the particle size of catalyst and its distribution,the catalytic activity,the hydrogen responsibility,and the performance of the polymer were investigated.The results indicated that the particle size of BCE catalyst containing dichloroethane and its distribution approximated to the referenced catalyst,while under the same polymerization condition,BCE catalyst containing dichloroethane exhibited higher activity.Dichloroethane could help to increase the hydrogen responsibility of BCE catalyst.The melt index of polymer prepared with BCE catalyst containing dichloroethane is higher than that of polymer prepared with the referenced catalyst.
引文
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[15]中国石油化工集团公司北京化工研究院.用于乙烯聚合或共聚合的催化剂及其制法和该催化剂的应用:中国,1263895[P].2000-08-23.
[16]LG化学株式会社.高活性镁负载催化剂及用该催化剂制备聚烯烃的方法:中国,1934142[P].2007-03-21.
[2]郭子方,张敬梅,陈伟,等.新型高效淤浆工艺聚乙烯催化剂的制备及其催化性能[J].石油化工,2005,34(9):840-843.
[3]中国石油化工集团公司,中国石油化工集团公司北京化工研究院.用于乙烯聚合或共聚合催化剂组分及其催化剂:中国,1229092[P].1999-09-22.
[4]郭子芳.乙烯淤浆聚合Ziegler-Natta催化剂的研究进展[J].石油化工,2009,38(4):451-455.
[5]联合碳化公司.乙烯聚合催化剂:中国,87107589[P].1988-05-18.
[6]韩华综合化学株式会社.乙烯聚合物的制备方法:中国,1150955[P].1997-06-04.
[7]三井化学株式会社.烯烃聚合用的固体钛催化剂制备方法以及聚烯烃制备方法:中国,1198751[P].1998-11-11.
[8]台湾聚合化学品股份有限公司.适用于烯烃聚合用的钛系催化剂触媒系统:中国,1189505[P].1998-08-05.
[9]中国石油化工集团公司北京化工研究院.用于烯烃聚合的高效球形钛系催化剂及其制法和该催化剂的应用:中国,1268520[P].2000-10-04.
[10]伊斯曼化学公司.乙烯和乙烯共聚物的聚合方法:中国,1551891[P].2004-12-01.
[11]伊斯曼化学公司.制备聚乙烯的方法:中国,1332753[P].2002-01-23.
[12]杨明生.气相流化床法线性聚乙烯催化剂及其制备方法:中国,1334276[P].2002-02-06.
[13]中国石油化工股份有限公司,中国石油化工股份有限公司北京化工研究院.用于制备双峰或宽分布聚乙烯的催化剂体系及应用:中国,1342716[P].2002-04-03.
[14]三井化学株式会社.烯烃聚合用的固体钛催化剂制备方法以及聚烯烃制备方法:中国,1198751[P].1998-11-11.
[15]中国石油化工集团公司北京化工研究院.用于乙烯聚合或共聚合的催化剂及其制法和该催化剂的应用:中国,1263895[P].2000-08-23.
[16]LG化学株式会社.高活性镁负载催化剂及用该催化剂制备聚烯烃的方法:中国,1934142[P].2007-03-21.