Catalyst component, its preparation and use in polymerization of alpha-olefins
申请人:TOA NENRYO KOGYO KABUSHIKI KAISHA
公开号:EP0050498A1
公开(公告)日:1982-04-28
A supported titanium containing catalyst component for use in propylene polymerization is prepared by co-pulverizing a magnesium haiide, an aromatic carboxylic acid ester and an aromatic carboxylic acid or a derivative thereof such the halide or anhydride and contacting the magnesium-containing solid with a titanium compound. The polymerization of propylene in the presence of a catalyst comprising this component and an organoaluminum compound produces polypropylene of high bulk density.
Catalyst components for polymerization of alpha-olefins and processes for their preparation and use
申请人:TOA NENRYO KOGYO KABUSHIKI KAISHA
公开号:EP0050497A1
公开(公告)日:1982-04-28
A supported titanium-containing catalyt component for .alpha-olefin polymerization is prepared by contacting a magnesium halide such as magnesium dichloride, an electron donor compound such as ethylbenzoate, an aromatic carboxylic acid or its derivative such as benzoyl chloride, an organic aluminum chloride compound such as ethylaluminum dichloride and a titanium compound such as titanium tetrachloride. The supported titanium-containing catalyst component in combination with an aluminum alkyl cocatalyst is useful for obtaining polypropylene having good bulk density.
THE CHEMOSELECTIVE PREPARATION OF THE SUBSTITUTED PHENYL BENZOATES USING RE–Y ZEOLITE AS CATALYST
作者:Yixiang Ding、Rui Wu、Qiang Lin
DOI:10.1081/scc-120005422
日期:2002.1.1
ABSTRACT A practical and chemoselective method for the synthesis of substituted phenyl benzoates using rare earth zeolite as catalyst was described, its recycle procedure offers high total yield.