Process of producing low-dust anionic surfactant concentrates in powder or granule form with improved solubility in aqueous media

US5536430A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Johann F. Fues · Grevenbroich, DE
• Wilfried Raehse · Goldkronach, DE
• Kathleen Paatz · Goldkronach, DE
• Wolfgang Poly · Mülheim an der Ruhr, DE
• Bert Gruber · Goldkronach, DE
• Andreas Syldath · Goldkronach, DE
• Sven Welper · Essen, DE
• Herbert Pattberg · Hilden, DE

Key dates

• Filing date: Oct 12, 1994
• Grant date: Jul 16, 1996
• Expiry date: Oct 12, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B21/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Anionic surfactant concentrates in the form of solid free-flowing powders and/or granules which may also be present as compounds in admixture with other auxiliaries and/or useful materials suitable for use in detergents and/or cleaning products and which have apparent densities of at least about 150 g/l are produced by hot drying of the water-containing preparations with superheated steam as the drying gas. Preferred apparent densities are above about 200 g/l and are preferably at least about 350 g/l. In addition, the pourable and free-flowing material is preferably in the form of a substantially dust-free material through the presence of dust-binding auxiliaries and/or useful materials and/or by regulation of the residual water content. In one preferred embodiment, the anionic surfactant concentrate is in the form of porous carrier beads with an absorbent porous inner structure.