Method for making a tris-(2-hydroxyethyl)-methylammonium methylsulfate fatty acid ester

US10011806B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Hans-Jurgen Kohle · Leingarten, DE
• Axel Euler · Steinau an der Straße, DE
• Kurt Seidel · Goldkronach, DE
• Peter Schwab · Bad Dürkheim, DE

Key dates

• Filing date: Nov 3, 2014
• Grant date: Jul 3, 2018
• Expiry date: Oct 6, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/30
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a method for making a tris-(2-hydroxyethyl)-methylammonium methylsulfate fatty acid ester by quaternizing a tris-(2-hydroxyethyl)-amine fatty acid ester with dimethylsulfate the quaternizing is carried out in the presence of a solid acid scavenger. The method can provide a fabric softener active composition, comprising from 65 to 98% by weight of at least one tris-(2-hydroxyethyl)-methylammonium methylsulfate fatty acid ester, the corresponding non-quaternized tris-(2-hydroxyethyl)-amine fatty acid esters in amounts providing a total amine number of the composition of from 2 to less than 7 mg KOH/g, and from 1 to 1500 ppm methanol.