Patent · US Expired

Styrylaryloxy ether sulfonates, a process for their preparation and their use in the recovery of crude oil

US4842776A · kind A · utility

9Cited by

8References

2Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Manfred Schmidt · Krefeld, DE
Walter Rupp
Gerhart Schneider · Königstein, DE
Eva M. Kohn · Bad Soden am Taunus, DE

Key dates

Filing date	Oct 22, 1987
Grant date	Jun 27, 1989
Priority date	—
Expiry date	Oct 22, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K8/584
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Styrylaryloxy ether sulfonates of the formula ##STR1## in which either R.sub.1 denotes styryl and simultaneously R.sub.2 and R.sub.3 are identical or different and denote hydrogen or styryl, or R.sub.1 and R.sub.2 are nonidentical and each denote methyl or styryl and simultaneously R.sub.3 denotes hydrogen or styryl, x denotes a number from 2 to 20, and M denotes an ammonium or alkali metal cation. These compounds are suitable as surfactant auxiliaries in oil recovery.

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