Process for the preparation of highly concentrated flowable aqueous solutions of betaines

US7297675B2 · kind B2 · utility

Assignee

• GOLDSCHMIDT HOLDING GMBH · DE

Inventors

• Petra Allef · Essen, DE
• Uwe Begoihn · Sneek, NL
• Burghard Gruning · Essen, DE
• Ralf Klein · Velbert, DE
• Jörg Peggau · Essen, DE

Key dates

• Filing date: Sep 19, 2006
• Grant date: Nov 20, 2007
• Expiry date: Sep 19, 2026

Classification

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

Abstract

The invention relates to a process for preparing highly concentrated flowable and pumpable aqueous solutions of betaines by quaternization of compounds containing tertiary amine nitrogen with ω-halocarboxylic acids by known processes, wherein 0.1 to less than 3% by weight, preferably 0.1 to 1% by weight, based on the end product, of one or more micellar thickeners are added to the reaction mixture before or during the quaternization reaction.