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Performance of NT-1 and BCH catalysts in ethylene slurry polymerization

MENG Weijuan1,2,ZHANG Xin2,LI Hongbo2,LI Jianwei1,CHEN Biaohua1   

  1. 1State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China;2Research Institute of Beijing Yanshan Petrochemical Limited Company,SINOPEC,Beijing 102500,China
  • Online:2011-06-05 Published:2011-06-05

NT-1和BCH催化剂在乙烯淤浆聚合中的催化性能

孟伟娟1,2,张 欣2,李洪泊2,李建伟1,陈标华1   

  1. 1北京化工大学化工资源有效利用国家重点实验室,北京100029;2中国石油化工股份有限公司北京化工研究院燕山分院,北京102500

Abstract:

The physical and structural properties of BCH and NT-1 industrial catalysts were characterized with XRD and BET. The effect of their structure on catalytic activity for ethylene slurry polymerization was investigated. It was found that BCH had a higher initial activity due to more macro-poreswhich was in favor of the diffusion of ethylene. During the intermediate and final stagethe activity of BCH was lower than NT-1 because part of active sites were embedded by polymer. The product synthesized by NT-1 catalyst possessed bigger average particle sizenarrower particle size distribution and better mechanical properties than that synthesized by BCH catalyst. Howeverthe bulk density of polyethylene produced by NT-1 catalyst was slightly lower than that produced by BCH catalyst. NT-1 catalyst’s sensitivity of hydrogen response and ability of copolymerization were better than those of BCH catalyst.

摘要:

利用XRDBET测试技术对BCHNT-1两种工业催化剂进行了物相表征和结构分析,研究了两种催化剂的结构对其催化乙烯淤浆聚合活性的影响。结果表明,BCH催化剂较多的大孔有利于单体的扩散,使得其初始活性较高,随着部分活性中心的被包埋导致中后期活性低于NT-1催化剂。采用NT-1催化剂聚合得到的产品粉末平均粒径大,粒径分布集中,但堆密度略低;产品的力学性能略优于用BCH聚合得到的产品。NT-1催化剂的氢调敏感性和共聚性能优于BCH催化剂。

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