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Dow Chemical Co
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Dow Chemical Co
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Priority to ES519434ApriorityCriticalpatent/ES8403498A1/en
Publication of ES519434A0publicationCriticalpatent/ES519434A0/en
Publication of ES8403498A1publicationCriticalpatent/ES8403498A1/en
The process comprises reaction of a mixt. of a tetravalent titanium cpd. which is a mixt. of a cpd. of tetrahydrocarbyloxy titanium and an oxide of bihydrocarbyloxy titanium in a molar ratio of 0.1:1 to 10:1, with an organomagnesium component. A halide source and an organoaluminium cpd. are also reacted, on the basis of specific atomic ratios. - An excess of the halide is employed, to convert the magnesium component into a dihalide.
ES519434A1983-01-311983-01-31Titanium and magnesium based Ziegler catalyst prepn.
ExpiredES8403498A1
(en)
Process for the catalytic preparation of polymers or copolymers of alpha-olefins having a high isotacticity index, and composition based on titanium chloride suitable as component of the catalytic systems used in this process
CATALYTIC SOLUTIONS THAT CAN BE USED FOR ALFA-OLEFIN STEREOSPECIFIC POLYMERIZATION, PREPARATION PROCESSES AND PROCESSES FOR ALFA-OLEFIN POLYMERIZATION IN THE EXISTENCE OF ALFA-OLEFIN SOLIDITY
Catalyst comprising a magnesium compound and a transition metal halide, process for the preparation of said catalyst, catalytic system comprising said catalyst and polymerisation process using said catalytic system.
Titanium tri:chloride catalyst complex for propylene polymerisation - is prepd. by reducing titanium tetra:chloride and activation by conversion to purple form (BE 16.8.79)