Patent · US Active

Process for the preparation of a multimodal polyolefin polymer with improved hydrogen removal

US8557932B2 · kind B2 · utility

2Cited by

3References

15Claims

0Family size

Assignee

Basell Polyolefine GmbH · DE

Inventors

Gerhardus Meier · Frankfurt, DE
Michael Aulbach · Hofheim, DE
Harald Prang · Lechenich, DE

Key dates

Filing date	Dec 20, 2010
Grant date	Oct 15, 2013
Priority date	—
Expiry date	Dec 20, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2308/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Process for the preparation of a multimodal polyolefin polymer at temperatures of from 40 to 150° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst in a first and a second polymerization reactor connected in series, wherein further polymerization reactors can be connected to said reactors upstream or downstream of said reactors, in which in the first polymerization reactor a first polyolefin polymer is prepared in suspension in the presence of hydrogen and in the second polymerization reactor a second polyolefin polymer is prepared in the presence of a lower concentration of hydrogen than in the first polymerization reactor, comprising

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