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. 05, 2014
Filed:
Feb. 08, 2013
Ineos Commercial Services Uk Limited, Hampshire, GB;
Andreas Harald Gondorf, Neuss, DE;
Jose Andre Laille, Salon de Provence, FR;
Claudine Viviane Lalanne-Magne, Saint Mitre les Remparts, FR;
Ineos Commercial Services UK Limited, Hampshire, GB;
Abstract
Process for polymerization and, in particular, to a process for start-up of a gas phase fluidized bed polymerization reaction involving one or more monomers using a catalyst in a reactor. The process includes providing a start-up bed of particles in the reactor in the presence of the one or more monomers but in the absence of the catalyst, introducing at Tcatalyst to the reactor to initiate reaction and start-up polymer production at a time T, Tbeing between 1 and 6 hours after T. The value of Xis less than a threshold value, wherein: X=Cumulative production in the time period Tto T/(Cumulative catalyst injection the time period Tto T*PC), where PCis the ethylene partial pressure in the reactor at the time T, subsequently stopping the injection of catalyst, and taking a corrective action to address the low value of X.