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
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Dec 5, 2024
app pub date -
Aug 12, 2024
filing date -
Aug 12, 2024
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Abstract
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 Owner | Address | |
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CHEVRON PHILLIPS CHEMICAL COMPANY LP | P O BOX 4910 THE WOODLANDS TX 77387-4910 |
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Clear, Kathy S | Bartlesville, US | 110 | 819 |
# of filed Patents : 110 Total Citations : 819 | |||
McDaniel, Max P | Bartlesville, US | 560 | 19791 |
# of filed Patents : 560 Total Citations : 19791 |
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