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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 11708438 B1

PDFFull Text
Date of Patent:
Jul. 25, 2023

Filed:

May. 26, 2021

Method of producing polyethylene and polyethylene thereof

Applicant:

Univation Technologies, Llc, Houston, TX (US);

Inventors:

Timothy M. Boller, Houston, TX (US);

Ching-Tai Lue, Sugar Land, TX (US);

Francis C. Rix, League City, TX (US);

Daniel P. Zilker, Jr., Charleston, WV (US);

C. Jeff Harlan, Houston, TX (US);

James M. Farley, League City, TX (US);

Fathi David Hussein, Hilton Head Island, SC (US);

Dongming Li, Houston, TX (US);

Steven A. Best, The Woodlands, TX (US);

Assignee:

Univation Technologies, LLC, Houston, TX (US);

Attorney:

Brooks, Cameron & Huebsch, PLLC

Primary Examiner:

Caixia Lu

Int. Cl.
CPC ...
C08F 4/6592 (2006.01); C08F 4/653 (2006.01); C08F 210/16 (2006.01); C08L 23/08 (2006.01); C08F 4/659 (2006.01); C07F 17/00 (2006.01); C08J 5/18 (2006.01); C08F 4/643 (2006.01); C08F 210/02 (2006.01); C08F 4/76 (2006.01); C08F 2/00 (2006.01); C08F 2/34 (2006.01); C08F 210/14 (2006.01); C08F 210/08 (2006.01);
U.S. Cl.
CPC ...
C08F 210/16 (2013.01); C07F 17/00 (2013.01); C08F 2/00 (2013.01); C08F 2/34 (2013.01); C08F 4/6432 (2013.01); C08F 4/65904 (2013.01); C08F 4/76 (2013.01); C08F 210/02 (2013.01); C08J 5/18 (2013.01); C08F 4/65912 (2013.01); C08F 4/65916 (2013.01); C08F 4/65925 (2013.01); C08F 4/65927 (2013.01); C08F 210/08 (2013.01); C08F 210/14 (2013.01); C08F 2410/02 (2013.01); C08F 2420/00 (2013.01); C08F 2420/01 (2013.01); C08F 2500/01 (2013.01); C08F 2500/02 (2013.01); C08F 2500/08 (2013.01); C08F 2500/09 (2013.01); C08F 2500/10 (2013.01); C08F 2500/11 (2013.01); C08F 2500/12 (2013.01); C08F 2500/13 (2013.01); C08F 2500/18 (2013.01); C08F 2800/20 (2013.01); C08J 2323/08 (2013.01); C08L 23/0815 (2013.01);
Abstract

A system and method of producing polyethylene, including: polymerizing ethylene in presence of a catalyst system in a reactor to form polyethylene, wherein the catalyst system includes a first catalyst and a second catalyst; and adjusting reactor conditions and an amount of the second catalyst fed to the reactor to control melt index (MI), density, and melt flow ratio (MFR) of the polyethylene.

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