METHODS FOR PREPARING CATALYSTS Russian patent published in 2019 - IPC C08F10/02 C08F4/02 C08F4/24 B01J37/08 B01J31/34 B01J32/00 B01J31/38 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a polymerisation catalyst. Described is a method of producing a polymerisation catalyst with low emissions of highly active volatile organic compounds (HRVOC), involving the following steps: (a) firing a silica support at temperatures in the range of about 100 °C to about 500 °C to form a pre-calcined silica support; (b) contacting the pre-calcined silica support with titanium isopropylate to form a titanised carrier; (c) after step b) contacting the titanised carrier with the polyol to form a titanised carrier (PATS) bonded to the polyol; (d) contacting said polyol-bound titanised support with chromium (III) acetylacetonate to form a polymerisation catalyst precursor; (e) drying the polymerization catalyst precursor to form a dried polymerisation precursor; and (f) calcining the dried polymerisation catalyst precursor to obtain a polymerisation catalyst, wherein during calcination of dried precursor of polymerisation catalyst, HRVOC emissions are less than 0.1 wt. %.

EFFECT: technical result is the development of an improved method of producing catalysts, which reduce HRVOC emissions.

10 cl, 1 tbl, 5 dwg, 1 ex