Catalysts and process for the preparation of catal

专利名称：Catalysts and process for the preparation of catalysts which may be used for the
polymerization of ethylene
发明人：Xavier Olonde,Karel Bujadoux,Andre
Mortreux,Francis Petit, deceased
申请号：US08/244679
申请日：19940607
公开号：US05492983A
公开日：
19960220
专利内容由知识产权出版社提供
摘要：This catalyst consists of the reaction product, with at least one organomagnesium compound and/or organolithium compound R.sup.1 Li (R. sup. 1
=alkyl) or ArLi (Ar=phenyl or benzyl), of the reaction product of (Cp). sub.2 MX.sub.2
Li(OR.sub.2).sub.2 (M=lanthanide, Sc, Y; (Cp) =optionally substituted cyclopentadienyl; and R=alkyl), with at least one bidentate ligand, such as &bgr;-diketone or &bgr;-keto imine CZ.sub.3 COCHZCDCZ. sub.3, Z selected from halogen, alkyl and H, D=O, NH or NR.sup. 3 (R.sup.3 =alkyl or aryl); and phosphorus ylid R.sup.2.sub.3 P═CA-- CO--R.sup.2, R.sup.2 chosen from alkyl and aryl; A=alkyl or H. It advantageously takes the form of a solution at least partially containing an aromatic hydrocarbon. The process for the polymerization of ethylene may be carried out at 20°-250° C. at a pressure which may range up to approximately 200 bars, in solution or in suspension in an at least C. sub.6 inert hydrocarbon or may be carried out continuously, in at least one autoclave or tubular reactor, at 150°-300° C., at 400- 2000 bars, the reaction medium being in the supercritical state.
申请人：ECP ENICHEM POLYMERES FRANCE 代理机构：Burns, Doane, Swecker & Mathis 更多信息请下载全文后查看。