Process for reducing the residual content of free alkylating agent in aqeous solutions of amphoteric or zwitterionic surfactants

US5281749A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Guenter Uphues · Monheim, DE
• Uwe Ploog · Haan, DE
• Klaudia Bischof · Werne, DE
• Kenan Kenar · Goldkronach, DE
• Pavel Sladek · Lehrte, DE

Key dates

• Filing date: May 28, 1992
• Grant date: Jan 25, 1994
• Expiry date: May 28, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C227/40
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for reducing the residual content of free alkylating agent in aqueous solutions of amphoteric or zwitterionic surface-active agents by aftertreatment with ammonia, an amino acid containing 2 to 8 carbon atoms, or an oligopeptide.