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:
Apr. 26, 2022
Filed:
Dec. 13, 2017
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Edward F. Smith, Houston, TX (US);
George A. Vaughan, Houston, TX (US);
Michael Awe, Langhorne, PA (US);
James R. Sollen, Ontario, CA;
Ronald N. Cooke, Ontario, CA;
Sateesh K. Rajput, Ontario, CA;
Ahmed H. Ali, Houston, TX (US);
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
A process for reducing the loss of catalyst activity of a Ziegler-Natta catalyst is provided. The process includes preparing a Ziegler-Natta (ZN) catalyst by contacting the ZN catalyst with at least one aluminum alkyl compound to produce a reduced ZN catalyst and storing and/or transporting the reduced ZN catalyst for at least 20 days at a temperature of 25° C. or less. The reduced ZN catalyst may be used for polymerizing polyolefin polymers.