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:
Dec. 27, 2011
Filed:
Dec. 18, 2008
Applicants:
Manfred Hecker, Naustadt, DE;
Markus Schopf, Bonn, DE;
Axel Hamann, Kerpen, DE;
Paulus-petrus Maria DE Lange, Wesseling, DE;
Inventors:
Manfred Hecker, Naustadt, DE;
Markus Schopf, Bonn, DE;
Axel Hamann, Kerpen, DE;
Paulus-Petrus Maria de Lange, Wesseling, DE;
Assignee:
Basell Polyolefine GmbH, Wesseling, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/34 (2006.01); C07C 7/09 (2006.01);
U.S. Cl.
CPC ...
Abstract
A continuous gas-phase process for the polymerization of alpha-olefins, in particular ethylene, comprising passing an alpha-olefin monomer stream through an oil filter in order to reduce the amount of oil to less than 8 ppm, and polymerizing the thus purified monomer feed in gas-phase reactor; the reduction of the amount of oil improves the operability of the plant over time.