Patent · US Active

Process for stopping and restarting polymerisation

US9505919B2 · kind B2 · utility

0Cited by

3References

20Claims

0Family size

Assignee

INEOS EUROPE AG · CH

Inventors

Stephan Malzburg · Dormagen, DE
Stefan Matull · Cologne, DE
Dirk Schroder · Meschede, DE

Key dates

Filing date	Dec 13, 2013
Grant date	Nov 29, 2016
Priority date	—
Expiry date	Dec 13, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/24
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Process for stopping and restarting a polymerization in a system having a gas phase fluidized bed or stirred bed reactor, a degassing vessel and a seedbed storage silo, by conducting a first polymerization in the reactor using a polymerization catalyst to produce a first polymer, stopping the polymerization and removing the first polymer from the reactor to the degassing vessel, and either:

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