Patent · US Expired

Purification of heteropolyacid-containing polyalkylene ether glycols

US5097077A · kind A · utility

4Cited by

2References

10Claims

0Family size

Assignee

BASF SE

Inventors

Herbert Mueller · Herznach, CH
Gerhard Jeschek · Havelsee, DE
Rolf Fischer · Heidelberg, DE
Hans-Juergen Weyer · Mannheim, DE

Key dates

Filing date	Oct 5, 1990
Grant date	Mar 17, 1992
Priority date	—
Expiry date	Oct 5, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/20
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process is described for the purification of crude polyalkylene ether glycols contaminated by heteropolyacids or salts thereof, by treatment with solvents, which comprises mixing the crude polyalkylene ether glycols with a liquid hydrocarbon and water, allowing the phases to separate, and isolating the purified polyalkylene ether glycols from the upper phase.

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