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. 30, 2005
Filed:
Oct. 29, 2002
Shahram Mihan, Ludwigshafen, DE;
Rainer Karer, Kaiserlautern, DE;
Manfred Hecker, Neustadt Wied, DE;
Philipp Rosendorfer, Neustadt Weinstrasse, DE;
Kasper Evertz, Milan, IT;
Armin Lange, Heidelberg, DE;
Shahram Mihan, Ludwigshafen, DE;
Rainer Karer, Kaiserlautern, DE;
Manfred Hecker, Neustadt Wied, DE;
Philipp Rosendorfer, Neustadt Weinstrasse, DE;
Kasper Evertz, Milan, IT;
Armin Lange, Heidelberg, DE;
Babell Polyolfine GmbH, Wesseling, DE;
Abstract
Continuous gas-phase polymerization process for preparing ethylene and propene homopolymers and copolymers, in which ethylene, propene or mixtures comprising ethylene or propene and C-C-α-monoolefins are polymerized in the polymerization zone of a gas-phase polymerization reactor at from 30 to 125° C. and pressures of from 1 to 100 bar in the gas phase in a bed comprising finely divided polymer in the presence of a catalyst. To remove the heat of polymerization, the reactor gas is circulated and firstly passes through a cyclone after leaving the reactor. To prevent polymer deposits in the circulating gas system, a catalyst poison having a boiling point above the maximum temperature within the circulating gas system is fed into this circulating gas system at a position between the reactor and the cyclone.