Ziegler-Natta catalyst

专利名称：Ziegler-Natta catalyst

发明人：Bailly, Jean-Claude A. BP Chimie Société

Anonyme,Sandis, Stylianos BP Chimie SociétéAnonyme

申请号：EP89301809.3申请日：19890223公开号：EP0336545A1公开日：19891011

摘要：A catalyst of the Ziegler-Natta type is prepared using a preactivated supportcontaining (A) from 80 to 95 mol % of magnesium chloride and (B) 5 to 20 mol % of atleast one electron donor compound which contains no labile hydrogen and no esterfunction; the preactivated support consisting of spherical particles having a mass averagediameter, Dm of 10 to 100 microns and a particle size distribution Dm/Dn of less than 2.The catalyst is prepared by (i) treating the preactivated support with at least oneelectron donor compound containing labile hydrogen, (ii) optionally treating theresulting activated support with at least one ester of an aromatic acid, (iii) impregnatingthe treated support with titanium tetrachloride and (iv) after washing the impregnatedcatalyst activating it with titanium tetrachloride. The catalyst has a high titanium contentand a high activity when used to polymerise olefins.

申请人：BP Chemicals Limited

地址：Britannic House 1 Finsbury Circus London EC2M 7BA GB

国籍：GB

代理机构：Hymers, Ronald Robson

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