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:
Aug. 20, 2024
Filed:
Nov. 13, 2019
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Paul J. Clymans, Kapelle-Op-Den-Bos, BE;
Jefferson P. Galliano, Singapore, SG;
Philippe A. P. D'Hooghe, Merelbeke, BE;
Cindy Dewitte, Puurs-Sint-Amands, BE;
Henri A. Lammens, Antwerp, BE;
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
Controlling the shutdown of a polyethylene reactor system that includes a secondary compressor, a reactor, a high pressure let down valve (HPLDV), a high-pressure separator, and a high-pressure recycle gas system is provided. After a partial or complete shutdown of secondary compressor, HPLDV opens to a pre-set open position until the reactor pressure reduces to either a pre-set reduced pressure limit or a until the slope of the reactor gas density to reactor pressure exceeds 0.15. The HPLDV controls the pressure to a pressure set point.