摘要
研究以Ｔｉ（ＯＢｕ）＿４／ＳｉＯ＿２－ＡｌＥｔ＿３乙烯二聚催化剂与ＴｉＣｌ＿４／ＬｌｇＣｌ＿２－ＡＩＥｔ＿３乙烯聚合催化剂组成的双催化剂体系，使乙烯二聚生成１－丁烯并与乙烯就地共聚生成ＬＬＤＰＥ的各种影响因素。提出了通过控制预二聚时间及两个催化剂投入量之比，使体系中１－丁烯浓度至少在１小时之内基本保持稳定，从而得到组成稳定的ＬＬＤＰＥ。
A process of ethylene dimerization and simultaneous in-situ copolymedzation of 1-butene with ethylene using a dual catalyst system consisting of a dimerizationcalystTi(oBu)_4/siO_2 and a copolymerization catalyst TiCl_4/MgCl_2 for producing branched polyethy-lene has been developed.The reaction conditions of dimerization and copolymerization wereinvestigated.It is found that by variation in the molar ratio of the two catalysts and thepre-run dimerization time,a basically stable concentration of l-butene in the systeim can bemaintained and, in consequence,a LLDPE with desirable and controllable branching can beobtained.
出处
《石油化工》
CAS
CSCD
北大核心
1994年第8期491-497,共7页
Petrochemical Technology
关键词
乙烯
共聚合
催化剂
聚乙烯
ethylene dimerization, ethylene copolymerization,dual catalyst system,LLDPE
