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:
Nov. 15, 2005
Filed:
Oct. 30, 2002
Ingrid S. Melaaen, Skjelsvik, NO;
Paul Allemeersch, Tessenderlo, BE;
Odd Jarle Vargal, Skien, NO;
Ben Arve Olsen, Porsgrunn, NO;
Lars Tore Grimsland, Langesund, NO;
Tone Aastad, Stahelle, NO;
Ingrid S. Melaaen, Skjelsvik, NO;
Paul Allemeersch, Tessenderlo, BE;
Odd Jarle Vargal, Skien, NO;
Ben Arve Olsen, Porsgrunn, NO;
Lars Tore Grimsland, Langesund, NO;
Tone Aastad, Stahelle, NO;
Borealis Technology Oy, , FI;
Abstract
A setting leg for a polymerization reactor connected to the lower part of the loop reactor (). A conduit () is welded to the loop reactor and leads to upper valve () and lower block valve (). Downstream of the lower block valve () is a further conduit () which leads to a lower region () and to a product take off (PTO) valve. Conduit () has a significantly greater cross-sectional area than conduit (). In use, the block valves () and () are always open to allow slurry from the reactor loop to enter the settling leg. The PTO valve () is regularly opened to allow the settled polyethylene 'fluff' to be rapidly expelled along conduit (). The greater area of conduit () significantly increases the settling rate ad polymer concentration of the polyethylene 'fluff'.