Process of making alkyl sulfate granulates

US6455488B1 · kind B1 · utility

Assignee

• Cognis Deutschland GmbH · DE

Inventors

• Georg Assmann · Frechen, DE
• Olaf Blochwitz · Genthin, DE
• Andreas Syldath · Goldkronach, DE
• Ditmar Kischkel · Monheim, DE

Key dates

• Filing date: Jan 12, 2001
• Grant date: Sep 24, 2002
• Expiry date: Jan 12, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C305/06
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A process for making substantially odorless granules of alkyl sulfates corresponding to formula (I): R-O-SO3X (I) wherein R is an alkyl group containing from 6 to 18 carbon atoms, and X is selected from the group consisting of an alkali metal, an alkaline earth metal, ammonium, an alkyl ammonium, and alkanolammonium, and a glucammonium ion, the process involving: (a) providing a water-containing paste of alkyl sulfates having a content of unsulfonated components of greater than 0.3% by weight; and (b) simultaneously granulating and drying, in a fluidized bed, the water-containing paste of alkyl sulfates to form substantially odorless granules of alkyl sulfates, and wherein the substantially odorles granules thus formed have less than 0.2% by weight, based on the weight of active substance, of unsulfonated components present therein.