Methods for Making Supported Chromium Catalysts with Increased Polymerization Activity

Number of patents in Portfolio can not be more than 2000

United States of America

APP PUB NO 20240399342A1
SERIAL NO

18800207

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Methods for making a supported chromium catalyst are disclosed, and can comprise contacting a silica-coated alumina containing at least 30 wt. % silica with a chromium-containing compound in a liquid, drying, and calcining in an oxidizing atmosphere at a peak temperature of at least 650° C. to form the supported chromium catalyst. The supported chromium catalyst can contain from 0.01 to 20 wt. % chromium, and typically can have a pore volume from 0.5 to 2 mL/g and a BET surface area from 275 to 550 m2/g. The supported chromium catalyst subsequently can be used to polymerize olefins to produce, for example, ethylene-based homopolymers and copolymers having high molecular weights and broad molecular weight distributions.

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Patent Owner(s)

Patent OwnerAddress
CHEVRON PHILLIPS CHEMICAL COMPANY LPP O BOX 4910 THE WOODLANDS TX 77387-4910

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Clear, Kathy S Bartlesville, US 110 819
McDaniel, Max P Bartlesville, US 560 19791

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Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges29415601 - 100200400600800100012001400160018002000220024002600280030003200

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