Patent · US Active

Process for continuously preparing polyisobutylene

US11072570B2 · kind B2 · utility

0Cited by

10References

22Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Wettling · Schifferstadt, DE
Stefan Hirsch · Neustadt, DE
Markus Brym · Schifferstadt, DE
Markus Weis · Ludwigshafen, DE

Key dates

Filing date	Jan 7, 2013
Grant date	Jul 27, 2021
Priority date	—
Expiry date	Oct 8, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F110/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Continuous preparation of polyisobutylene having a content of terminal double bonds of more than 50% by polymerizing isobutene in the presence of a polymerization catalyst customary therefor, by combining a technical 1-butene-, 2-butene- and isobutene-containing C4 hydrocarbon stream together with a stream of pure isobutene and feeding them into the reaction zone in such a way that the steady-state concentration of the isobutene in the combined stream at the feed point of the combined stream into the reaction zone has an average value of at least 40% by weight, and a polymerization plant therefor.

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