METHODS OF OBTAINING CATALYST USING HYDRATED REAGENTS Russian patent published in 2024 - IPC B01J37/04 B01J37/08 B01J21/06 B01J21/08 B01J23/26 B01J31/34 C08F4/16 C08F4/22 

FIELD: chemistry.

SUBSTANCE: methods of preparing olefin polymerization catalyst compositions and polymers prepared therefrom. A method of producing an olefin polymerization precatalyst is described, the method comprises contacting (i) a solvent, (ii) a carboxylic acid, (iii) a peroxide-containing compound, (iv) a titanium-containing compound, (v) a nitrogen-containing compound, (vi) a chromium-containing compound, and (vii ) a carrier of silicon dioxide to form a mixture; and spray drying the mixture to obtain a pre-catalyst powder; wherein: the weight ratio of solvent to carboxylic acid in the mixture is from about 1:1 to about 100:1; the equivalent molar ratio of titanium-containing compound to carboxylic acid in the mixture is from 1:1 to 1:4; the equivalent molar ratio of titanium-containing compound to nitrogen-containing compound in the mixture is from 1:1 to 1:4; pH of the mixture ranges from 3.5 to 4.5; and the silica carrier includes from 0.1 wt.% to 20 wt.% of water.

EFFECT: obtaining a catalyst using hydrated reagents.

11 cl, 1 dwg, 11 tbl, 10 ex