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:
Mar. 02, 2004
Filed:
Jun. 08, 1999
Benno Knauer, Ludwigshafen, DE;
Peter Hennenberger, Freinsheim, DE;
Klaus Hilligardt, Limburgerhof, DE;
Eckard Schauss, Heuchelheim, DE;
Horst Bullack, Wesseling, DE;
Basell Polyolefine GmbH, Wessling, DE;
Abstract
Ethylenically unsaturated monomers are polymerized in a gas-phase fluidized-bed reactor comprising a reactor space ( ) in the form of a vertical tube, a calming zone ( ) adjoining the upper part of the reactor space, a circulated gas line ( ), a circulated gas compressor ( ), a cooling apparatus ( ), a gas distributor plate ( ) which forms the lower boundary of the reactor space and, if desired, a flow divider ( ), wherein the gas distributor plate ( ) has a plurality of gas flow orifices ( ) whose outlet sides are widened conically.