摘要:
A process for the preparation of a propylene random copolymer, wherein propylene is polymerised with ethylene and/or a C4-C20 alpha-olefin in the presence of a catalyst system comprising solid catalyst particles, wherein the solid catalyst particles (a) have a specific surface area of less than 20 m 2 /g, (b) comprise a transition metal compound which is selected from one of the groups 4 to 10 of the periodic table or a compound of actinide or lanthanide, (c) comprise a metal compound which is selected from one of the groups 1 to 3 of the periodic table, and (d) comprise inclusions not having catalytically active sites.
摘要:
The invention refers to a process for increasing the polymerisation activity of a titanium containing catalyst, in particular an olefin polymerisation catalyst component in particulate form having an improved high temperature activity and the use thereof in a process for polymerising olefins.
摘要:
A process for producing a Gp IIa/transition metal olefin polymerisation catalyst component, in which a Gp IIa metal complex is reacted with a transition metal compound so as to produce an oil-in-oil emulsion, the disperse phase containing the preponderance of the Mg being solidified by heating to provide a catalyst component of excellent morphology. Polymerisation of olefins using a catalyst containing such a component is also disclosed. The process may be employed in the production of Ziegler-Natta catalysts.
摘要:
Catalyst in form of solid particles, wherein the particles - have a specific surface area of less than 20 m 2 /g, - comprise a transition metal compound which is selected from one of the groups 4 to 10 of the periodic table (IUPAC) or a compound of actinide or lanthanide, - comprise a metal compound which is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and - comprise solid material, wherein the solid material • does not comprise catalytically active sites, • has a specific surface area below 500 m 2 /g, and • has a mean particle size below 200 nm.
摘要:
Catalyst in form of solid particles, wherein the particles - have a specific surface area of less than 20 m 2 /g, - comprise a transition metal compound which is selected from one of the groups 4 to 10 of the periodic table (IUPAC) or a compound of actinide or lanthanide, - comprise a metal compound which is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and - comprise solid material, wherein the solid material • does not comprise catalytically active sites, • has a specific surface area below 500 m 2 /g, and • has a mean particle size below 200 nm.
摘要:
The invention provides a process for producing an olefin polymerisation catalyst, comprising suspending a porous particulate support material in a liquid/liquid two phase system which comprises a solution of one or more catalyst components and an inert solvent immiscible therewith, to impregnate said solution into the pores of said support material, and optionally solidifying said impregnated solution present in the pores of said support particles.
摘要:
Process for preparing an olefin polymerisation catalyst component comprising magnesium halide, titanium halide and a carboxylic acid ester electron donor, in which the precursors of its constituents are reacted in solution from which the component is eventually precipitated, this precipitation being accompanied by co-precipitation of one or more oligoesters of the carboxylic acid formed in a controlled manner. The component is employed, together with an organometallic co-catalyst, for polymerisation of C 2 -C 10 α-olefins.