Process for increasing the density of spray dried, phosphate-reduced detergents

US5149455A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Jochen Jacobs · Wuppertal, DE
• Ulrich Jahnke · Monheim, DE
• Dieter Jung · Daaden, DE
• Rudolf Oleffelmann · Langenfeld, DE
• Wilfried Adler · Haan, DE

Key dates

• Filing date: Jan 18, 1991
• Grant date: Sep 22, 1992
• Expiry date: Jan 18, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D1/72
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The density of a spray-dried, phosphate-reduced detergent powder containing PA0 A) 4 to 20% by weight of at least one anionic surfactant, PA0 B) 2 to 20% by weight of at least one nonionic surfactant, PA0 C) 20 to 50% by weight of at least one builder, PA0 D) 3 to 25% by weight washing alkalis, PA0 E) 0 to 30% by weight of other detergent constituents which lend themselves to hot spray drying is increased by continuously introducing a detergent powder having up to 50% of the final amount of nonionic surfactant into a cylindrical, horizontally arranged mixing drum in which a shaft is mounted for axial rotation. The shaft is equipped with radially arranged impact tools of defined length. The rotational speed of the shaft is regulated to provide a Froude index of from 50 to 1000.