Patent · US Expired

Gas phase polymerization method

US6596822B1 · kind B1 · utility

0Cited by

1References

10Claims

0Family size

Assignee

Basell Polyolefine GmbH · DE

Inventors

Michael Witt · Zevenaar, NL
Andreas Deckers · Flomborn, DE
Farid Rizk · Schifferstadt, DE
Kaspar Evertz · Schifferstadt, DE

Key dates

Filing date	Apr 2, 2002
Grant date	Jul 22, 2003
Priority date	—
Expiry date	Apr 2, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/901
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method and an apparatus for the polymerization of gaseous olefins, in particular of ethylene and at least one &agr;-olefin, in the gas phase in a stirred or fluidized, catalyst-containing polymerization zone (2) and at least one decompression zone (6, 10) downstream of the polymerization zone (2). The mixture of solid (co)polymer and unreacted monomers leaving the polymerization zone (2) flows through a settling zone, in particular in the form of a settling leg (14), before the decompression zone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.