NT-1和BCH催化剂在乙烯淤浆聚合中的催化性能.pdfVIP

学兔兔 化 工 进 展 2011年第30卷第6期 CHEMICAL INDUSTRY AND ENGINEER1NG PROGRESS ·1237· NT-1和BCH催化剂在乙烯淤浆聚合中的催化性能 孟伟娟 ，张 欣 ，李洪泊 ，李建伟 ，陈标华 ( 北京化工大学化工资源有效利用国家重点实验室，北京100029； 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) 摘 要：利用XRD和BET测试技术对BCH和NT—l两种工业催化剂进行了物相表征和结构分析，研究了两种 催化荆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。 关键词：乙烯；淤浆聚合；NT-1催化剂；BCH催化剂；性能 中图分类号：TQ 032 文献标志码：A 文章编号：1000—6613(2011)06—1237—04 Performance of NT一1 and BCH catalysts in ethylene slurry polymerization MENG Weijuan 2，ZHANGXin ，LIHongbo ，LIJianwei ，CHENBiaohua ( State Key Laboratory of Chemical Resource Engineering，Beijing University of Chemical Technology， Beijing 100029，China； Research Institute ofBe~ing Yanshan Petrochemical Limited Company， SINOPEC，Beijing 102500，China) Abstract：The physical and structural properties of BCH and NT一1 industrial catalysts were characterized with XRD and BET．The effect of their structure on cal：alytic activity for ethylene slurry polymerization was investigated．It was found that BCH had a higher initial activity due to more macro—pores，which was in favor of the diffusion of ethylene．During the intermediate and final stage， the activity of BCH was lower than NT．1 because part of active sites were embedded by polymer．The product synthesized by NT—l catalyst possessed bigger average particle size，narrower particle size distribution and better mechanical properties than that synthesized bv BCH catalys