Patent · US Active

Process for separating vinyl esters from a gas stream comprising ethylene and vinyl esters

US9272979B2 · kind B2 · utility

1Cited by

2References

12Claims

0Family size

Assignee

Basell Polyolefine GmbH · DE

Inventors

Erich Neumann · Braunschweig, DE
Christoph Wolf · Pulheim, DE
Dieter Littmann · Heßheim, DE

Key dates

Filing date	Dec 16, 2013
Grant date	Mar 1, 2016
Priority date	—
Expiry date	Dec 16, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for separating esters of vinyl alcohol from a gas stream comprising from 70 to 99.5% by weight of ethylene and from 0.5 to 30% by weight of esters of vinyl alcohol being at a pressure in the range of from 0.5 MPa to 10 MPa and a temperature in the range of from 5° C. to 50° C.; and a process for copolymerizing ethylene and esters of vinyl alcohol in the presence of free-radical polymerization initiators at pressures in the range of from 110 MPa to 500 MPa and temperatures in the range of from 100° C. to 350° C. in a continuously operated polymerization apparatus comprising such a process for separating esters of vinyl alcohol from a gas stream comprising from 70 to 99.5% by weight of ethylene and from 0.5 to 30% by weight of esters of vinyl alcohol.

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