Patent · US Active

Slurry phase polymerisation process

US7981983B2 · kind B2 · utility

3Cited by

5References

26Claims

0Family size

Assignee

INEOS MANUFACTURING BELGIUM NV · BE

Inventors

Stephen Kevin Lee · Oakland, US
Daniel Marissal · Braine-le-Comte, BE
Brent R. Walworth · Sint-Niklaas, BE

Key dates

Filing date	Nov 20, 2009
Grant date	Jul 19, 2011
Priority date	—
Expiry date	Nov 20, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/918
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for controlling a slurry phase (co-) polymerisation process in the presence of a polymerisation catalyst, which comprises maintaining the density SPAN of the polymer powder particles (defined as the absolute value of the density difference in g/cm3 between the average density of the polymer particles exiting the reactor with particle size above D90 and the average density of the material with particle size below D10) below 0.005, preferably below 0.003, more preferably below 0.0026, most preferably below 0.0023.

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