Method for producing fatty acid polyglycol ester sulphates

US6235913A · kind A · utility

Assignee

• Cognis Deutschland GmbH · DE

Inventors

• Hans-Christian Raths · Monheim, DE
• Thomas Engels · Goldkronach, DE
• Rainer Rueben · Monheim, DE
• Joerg Kahre · Monheim, DE

Key dates

• Filing date: May 22, 2000
• Grant date: May 22, 2001
• Expiry date: May 22, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D1/90
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method of producing fatty acid polyglycol ester sulfates of the general formula (I): EQU R.sup.1 COO(AO).sub.n SO.sub.3 M (I) is disclosed, wherein R.sup.1 CO represents a linear or branched, aliphatic, saturated and/or unsaturated acyl radical with 6 to 22 carbon atoms, AO represents CH.sub.2 CH.sub.2 O, CHCH.sub.3 CH2O and/or CH.sub.2 CHCH.sub.3, n represents a number from about 0.5 to about 5 and M represents a cation. The disclosed process comprises the sulfation of fatty acid polyglycol esters followed by neutralization, wherein the neutralization is carried out at a pH of from about 5 to about 9.