Process for the production of tablet form detergent compositions

US4587031A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Hans-Friedrich Kruse · Korschenbroich, DE
• Martin Witthaus · Goldkronach, DE
• Theodor Altenschopfer · Düsseldorf, DE
• Klaus Schumann · Weil am Rhein, DE

Key dates

• Filing date: Apr 10, 1984
• Grant date: May 6, 1986
• Expiry date: Apr 10, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D17/0091
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for the production of tablet form detergent compositions is afforded, comprising: PA1 (a) the partial hydration of from 10 to 60 parts by weight of an anhydrous sodium polyphosphate to form from 30 mole percent to less than 80 mole percent of tripolyphosphate hexahydrate; PA1 (b) mixing the partial hydrate with from 20 to 70 parts by weight of a powder-form, substantially anhydrous sodium silicate (Na.sub.2 O: SiO.sub.2 =1:1 to 1:4); PA1 (c) spraying the mixture with water or an aqueous silicate solution; and PA1 (d) granulation by agitation, followed by crystallization, other detergent ingredients optionally being added along with bleaches or enzymes, and adding from 1 to 5% by weight of sodium acetate or from 0.5 to 3% by weight of dicalcium phosphate dihydrate or a mixture thereof as a tableting aid, followed by tableting under a pressure of more than 70 kp/cm.sup.2, leading to mechanically strong, but rapidly dissolving tablet form detergent compositions.