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.:
Date of Patent:
Mar. 08, 2022
Filed:
Jan. 07, 2019
Univation Technologies, Llc, Houston, TX (US);
Mark G. Goode, South Charleston, WV (US);
Francois Alexandre, Saint-Leonard, CA;
Kevin J. Cann, Tierra Verde, FL (US);
Barbara J. Kopp, Middlesex, NJ (US);
William A. Matthews, Hilton Head Island, SC (US);
John H. Moorhouse, Middlesex, NJ (US);
Cliff R. Mure, Middlesex, NJ (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
Disclosed herein are methods of controlling polymer properties in polymerization processes that use a chromium-based catalyst. An embodiment discloses a method of producing a polyolefin comprising: contacting a reaction mixture and a reduced chromium oxide catalyst in a gas-phase reactor to produce the polyolefin, wherein the reaction mixture comprises a monomer and a co-monomer; and changing a reaction temperature in the gas-phase reactor by about 1° C. or more whereby a gas molar ratio of the co-monomer to the monomer is changed by about 2% or more and a co-monomer content of the polyolefin at substantially constant density is changed by about 2% or more. Additional methods and compositions are also provided.