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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12053761 B1

PDFFull Text
Date of Patent:
Aug. 06, 2024

Filed:

Aug. 15, 2023

Methods for making supported chromium catalysts with increased polymerization activity

Applicant:

Chevron Phillips Chemical Company Lp, The Woodlands, TX (US);

Inventors:

Max P. McDaniel, Bartlesville, OK (US);

Kathy S. Clear, Bartlesville, OK (US);

Assignee:

Chevron Phillips Chemical Company LP, The Woodlands, TX (US);

Attorney:

Merchant & Gould P.C.

Primary Examiner:

Fred M Teskin

Int. Cl.
CPC ...
B01J 23/26 (2006.01); B01J 21/12 (2006.01); B01J 27/047 (2006.01); B01J 27/188 (2006.01); B01J 35/02 (2006.01); B01J 35/10 (2006.01); B01J 35/40 (2024.01); B01J 35/61 (2024.01); B01J 35/63 (2024.01); B01J 37/00 (2006.01); B01J 37/02 (2006.01); B01J 37/08 (2006.01); B01J 37/12 (2006.01); C08F 2/00 (2006.01); C08F 4/78 (2006.01); C08F 110/02 (2006.01);
U.S. Cl.
CPC ...
B01J 23/26 (2013.01); B01J 21/12 (2013.01); B01J 27/047 (2013.01); B01J 27/188 (2013.01); B01J 35/40 (2024.01); B01J 35/615 (2024.01); B01J 35/635 (2024.01); B01J 35/638 (2024.01); B01J 37/0045 (2013.01); B01J 37/0209 (2013.01); B01J 37/082 (2013.01); B01J 37/12 (2013.01); C08F 2/00 (2013.01); C08F 4/78 (2013.01); C08F 110/02 (2013.01);
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 m/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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