Patent · US Active

Multi reactor process

US8101693B2 · kind B2 · utility

14Cited by

15References

11Claims

0Family size

Assignee

NOVA Chemicals (International) S.A. · CH

Inventors

Lauwrence Martin Jozef Van Asseldonk · Sarnia, CA
Stephen John Brown · Calgary, CA

Key dates

Filing date	Dec 6, 2010
Grant date	Jan 24, 2012
Priority date	—
Expiry date	Dec 6, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F210/16
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

This invention relates to the polymerization of ethylene polymers using a continuously stirred tank reactor (CSTR) that is connected in series to a tubular reactor. The tubular reactor receives a polymer solution from the CSTR. Further polymerization in the tubular reactor improves production efficiencies, particularly with respect to lowering the amount of energy required to recover the polymer and residual comonomer from the solution. The use of tempered i.e. (heated) ethylene in the tubular reactor has been discovered to mitigate gel problems and lower/reduce levels of hexane extractables.

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