Patent · US Expired

Sulfonated tributylphenol ethoxylates, their use, and a process for preparing sulfonated alkoxylates

US4600516A · kind A · utility

7Cited by

7References

6Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Norbert Wester · Hofheim, DE
Klaus-Martin Uhl · Plochingen, DE
Walter Gulden · Hofheim, DE
Gerhart Schneider · Königstein, DE

Key dates

Filing date	Feb 15, 1984
Grant date	Jul 15, 1986
Priority date	—
Expiry date	Feb 15, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S507/936
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Sulfonated tributylphenol ethoxylates of the formula ##STR1## where x denotes a number from 2 to 20, and M denotes a cation, their use as surfactants, in particular as auxiliaries in the tertiary production of crude oil, and an improved, general process for preparing sulfonated alkyl and (alkyl)aryl polyalkoxylates by reacting halides of alkyl and (alkyl)aryl polyethoxylates with alkali metal sulfite by carrying out the reaction in the presence of lower alcohols, polyols, monoethylene glycol, polyethylene glycol or alkyl ethers thereof, as solubilizing agents.

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