Process for making a granular product containing sodium triphosphate

US4800055A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Helmut Klee · Hürth, DE
• Hans Haas
• Werner Kowalski · Weilerswist, DE
• Theo Dahmen · Münstermaifeld, DE

Key dates

• Filing date: Mar 4, 1986
• Grant date: Jan 24, 1989
• Expiry date: Mar 4, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B25/418
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A granular hydrated product consisting completely or partially of sodium triphosphate for use in detergent and cleaning compositions is made. To this end, pulverulent sodium triphosphate containing less than 22 wgt % water is compacted by initially mixing it with a quantity of water sufficient for hydrating at most 100% of the sodium triphosphate to the hexahydrate and then continuously admitting the resulting mixture to a zone inside which it is made into solid matter under pressure.