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:
Oct. 23, 2012
Filed:
Oct. 15, 2008
Alain Berardi, Marseilles, FR;
Andre Frederich, Brussels, BE;
Dominique Jan, Beaufays, BE;
Jean-jacques Kuhlburger, Martigues, FR;
Anthony Sgard, Marignane, FR;
Alain Van Daele, Geer, BE;
Alain Berardi, Marseilles, FR;
Andre Frederich, Brussels, BE;
Dominique Jan, Beaufays, BE;
Jean-Jacques Kuhlburger, Martigues, FR;
Anthony Sgard, Marignane, FR;
Alain Van Daele, Geer, BE;
Ineos Europe Limited, Hampshire, GB;
Abstract
Process for polymerization of ethylene using a catalyst system including (i) a solid catalyst of Ti, Mg and halogen, (ii) a first activator which is at least one trialkylaluminium compound of the formula AlR, where each R is independently a C2 to C20 alkyl radical, and (iii) a second activator which is at least one alkylaluminium chloride of the formula AlR'Cl, where each R′ is independently a C2 to C20 alkyl radical. The second activator is introduced directly into the polymerization reactor, without precontact with the solid catalyst, continuously or semi-continuously, and at a maximum rate of introduction at any time corresponding to less than 10 ppm by weight of chlorine relative to the rate of polyethylene production.