Patent · US Expired

Polyoxyalkylene-polysiloxane block copolymers as demulsifiers for water-containing oil

US5004559A · kind A · utility

16Cited by

5References

3Claims

0Family size

Assignee

Th. Goldschmidt. AG · DE

Inventors

Gotz Koerner · Essen, DE
Dietmar Schaefer · Hattingen, DE

Key dates

Filing date	Nov 16, 1988
Grant date	Apr 2, 1991
Priority date	—
Expiry date	Nov 16, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G77/46
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

To demulsify water-containing crude oil, selected polyoxyalkylene-polysiloxane block copolymers are described. The demulsifiers are used in amounts of less than 200 ppm based on the crude oil.

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