FIELD: pre-catalyst compositions.
SUBSTANCE: method for preparing pre-catalyst compositions for the polymerization of olefins, which includes: a) bringing into contact a solvent, a carboxylic acid, and a peroxide-containing compound to form an acidic mixture, b) bringing a titanium-containing compound and an acidic mixture into contact to form a solubilized titanium mixture, c) bringing into contact carrier of chromium-silica, drying the addition product by heating. Method for preparing pre-catalyst compositions for the polymerization of olefins, which includes: a) bringing into contact a solvent, a carboxylic acid, a nitrogen-containing compound and a peroxide-containing compound to form an acidic mixture, b) bringing a titanium-containing compound and an acidic mixture into contact to form a solubilized titanium mixture, c) bringing into contact carrier of chromium-silica, drying the addition product by heating. Method for preparing pre-catalyst compositions for the polymerization of olefins, which includes: a) contacting a solvent, at least two carboxylic acids and a peroxide-containing compound to form an acidic mixture, b) bringing a titanium-containing compound and an acidic mixture into contact to form a solubilized titanium mixture, c) bringing into contact carrier of chromium-silica, drying. Method for preparing pre-catalyst compositions for the polymerization of olefins, which includes: a) bringing into contact a solvent, a carboxylic acid, an acidic phenol nitrogen-containing compound and a peroxide-containing compound to form an acidic mixture, b) bringing a titanium-containing compound and an acidic mixture into contact to form a solubilized titanium mixture, c) bringing into contact carrier of chromium-silica, drying of product.
EFFECT: obtaining compositions of a pre-catalyst for the polymerization of olefins.
17 cl, 1 dwg, 11 tbl, 10 ex
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