A Novel Stereoselective Synthesis of Maleate Derivatives via Palladium-Catalyzed Dicarboalkoxylation of Terminal Alkynes
摘要:
Alkynes were dicarboalkoxylated efficiently and stereoselectively in high yields reacting for about 2h under atmospheric pressure of carbon monoxide at room temperature using a catalytic amount of PdCl2 and a stoichiometric amount of CuCl2.
Components and catalysts for the polymerization of olefins
申请人:——
公开号:US20040014595A1
公开(公告)日:2004-01-22
The present invention relates to a solid catalyst component for the polymerization of olefins CH
2
═CHR in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and an electron donor selected from maleates of a particular formula. Said catalyst components when used in the polymerization of olefins, and in particular of propylene, are capable to give polymers in high yields and with high isotactic index expressed in terms of high xylene insolubility.
Internal electron donor compound for preparing α-olefin polymerization catalyst component
申请人:YINGKOU XIANGYANG CATALYST CO., LTD
公开号:US10287371B2
公开(公告)日:2019-05-14
An internal electron donor compound for preparing α-olefin polymerization catalyst component, including two kinds of electron donors; the proportion of the two kinds of electron donors in the compounding preparation of the catalyst is determined via designed experiments so as to obtain a catalyst component having good comprehensive performance or a particular performance. The electron donor compound of the present invention can be used in the preparation of α-olefin polymerization and co-polymerization catalyst component, particular the preparation of propylene polymerization catalyst component, and is applicable to prepare the propylene polymerization catalyst component by reacting magnesium chloride-ethanols complex compound carrier with titanium tetrachloride and electron donors, or to directly prepare the propylene polymerization catalyst component by reacting magnesium chloride, alcohols, titanium tetrachloride, and internal electron donor. In addition, also provided is a theoretical basis for selecting a proper electron donor combination from a plurality of electron donors.
COMPONENTS AND CATALYSTS FOR THE POLYMERIZATION OF OLEFINS
申请人:Basell Poliolefine Italia S.p.A.
公开号:EP1425317A1
公开(公告)日:2004-06-09
Internal Electron Donor Compound for Preparing Alpha-olefin Polymerization Catalyst Component
申请人:YINGKOU XIANGYANG CATALYST CO., LTD
公开号:US20160229935A1
公开(公告)日:2016-08-11
An internal electron donor compound for preparing α-olefin polymerization catalyst component, including two kinds of electron donors; the proportion of the two kinds of electron donors in the compounding preparation of the catalyst is determined via designed experiments so as to obtain a catalyst component having good comprehensive performance or a particular performance. The electron donor compound of the present invention can be used in the preparation of α-olefin polymerization and co-polymerization catalyst component, particular the preparation of propylene polymerization catalyst component, and is applicable to prepare the propylene polymerization catalyst component by reacting magnesium chloride-ethanols complex compound carrier with titanium tetrachloride and electron donors, or to directly prepare the propylene polymerization catalyst component by reacting magnesium chloride, alcohols, titanium tetrachloride, and internal electron donor. In addition, also provided is a theoretical basis for selecting a proper electron donor combination from a plurality of electron donors.
INTERNAL ELECTRON DONOR COMPOUND FOR PREPARING ALPHA-OLEFIN POLYMERIZATION CATALYST COMPONENT
申请人:YINGKOU XIANGYANG CATALYST CO., LTD
公开号:US20190218317A1
公开(公告)日:2019-07-18
An internal electron donor compound for preparing a-olefin polymerization catalyst component, including two kinds of electron donors; the proportion of the two kinds of electron donors in the compounding preparation of the catalyst is determined via designed experiments so as to obtain a catalyst component having good comprehensive performance or a particular performance. The electron donor compound of the present invention can be used in the preparation of a-olefin polymerization and co-polymerization catalyst component, particular the preparation of propylene polymerization catalyst component, and is applicable to prepare the propylene polymerization catalyst component by reacting magnesium chloride-ethanolscomlex compound carrier with titanium tetrachloride and electron donors, or to directly prepare the propylene polymerization catalyst component by reacting magnesium chloride, alcohols, titanium tetrachloride, and internal electron donor. In addition, also provided is a theoretical basis for selecting a proper electron donor combination from a plurality of electron donors.