PROCEDURE FOR MANUFACTURING CATALYST COMPONENTS FOR POLYMERIZING OLEFINES

摘要

A procedure for manufacturing solid catalyst components for catalysts serving polymerization of alpha-olefines, of the kind which comprises a solid carrier substance containing an organic or inorganic magnesium compound and treated with a titanium halide and optionally with an electron donor compound. The magnesium compound or the mixture of magnesium compound and electron donor compounds is sprayed in molten state into a chamber or volume (16) which has been cooled to a temperature at which the catalyst component will solidify from the melt in the form of particles with generally spherical shape, without any substantial evaporation of solvents.