ORGANOMETALLIC COMPOUND IN SOLID FORM, PROCESS FOR PREPARING THE SAME AND USE THEREOF

摘要

The present invention provides a solid organomagnesium precursor having formula {Mg(OR′)X}.a{MgX2}.b{Mg(OR′)2}.c{R′OH}, wherein R′ is selected from a hydrocarbon group, X is selected from a halide group, and a:b:c is in range of 0.01-0.5:0.01-0.5:0.01-5 and process for preparing the same, said process comprising contacting a magnesium source with a solvating agent, an organohalide and an alcohol to obtain the solid organomagnesium precursor. The present invention also provides a process for preparing a catalyst system using the organomagnesium precursor and its use thereof for polymerization of olefins.

主权项

1. A process for preparation of a catalyst composition, said process comprising:
(a) contacting a solution of transition metal compound represented by M(OR′″)pX4-p, where M is a transition metal and is selected from a group comprising of Ti, V, Zr, and Hf; X is a halogen atom; R′″ is a hydrocarbon group and p is an integer having value equal or less than 4, with the solid organomagnesium precursor component as claimed in claim 1 to obtain a resulting solution and contact temperature of solid organomagnesium precursor and the transition metal compound is between about −50° C. and about 150° C., and preferably between about −30° C. and about 120° C.; (b) adding an internal donor either to the solid organomagnesium precursor component or to the titanium component and the contact time of the said component with the internal electron donor immediate or is at least 1 minutes to 60 minutes at contact temperature of between about −50° C. and about 100° C., and preferably between about −30° C. and about 90° C.; (c) treating the resulting solution obtained in the step (a) with a solution comprising a titanium component in a solvent and recovering a solid titanium catalyst component and maintaining the same at a temperature value in the range of 100 to 120° C. for about 10 to 60 minutes; and (d) optionally repeating step (c) for a predetermined number of times and then washed sufficiently with inert solvent at temperature 20° C. to 80° C. to obtain a solid catalysts composition.