Patent · US Active

Polymerisation process

US8017702B2 · kind B2 · utility

0Cited by

3References

14Claims

0Family size

Assignee

INEOS MANUFACTURING BELGIUM NV · BE

Inventors

Marc Parisel · Vilvoorde, BE
Brent R. Walworth · Sint-Niklaas, BE

Key dates

Filing date	May 13, 2008
Grant date	Sep 13, 2011
Priority date	—
Expiry date	May 13, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F10/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Olefin polymerisation process in which a slurry of olefin polymer is produced within a polymerisation zone, followed by withdrawing a polymer slurry stream from the polymerisation zone, and passing the polymer slurry stream through a transfer line to a centrifugal concentrating device which separates the polymer slurry stream into a solids-lean stream or streams each having a solids concentration less than that of the polymer slurry stream entering the concentrating device and a solids-rich stream or streams each having a solids concentration greater than that of the polymer slurry stream entering the concentrating device. At least part of the solids-rich stream or streams is recycled back into the polymer slurry stream upstream of the concentrating device and downstream of the polymerisation zone, and 2-60 vol % of the solids-rich slurry stream is recycled back into the polymer slurry stream upstream of the concentrating device.

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