Granulate consisting of hydrated sodium tripolyphosphate and water-insoluble alumino silicate ion exchanger material

US4430246A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gunter Sorbe · Hürth, DE
• Horst-Dieter Wasel-Nielen · Hürth, DE
• Joachim Kandler · Lechenich, DE

Key dates

• Filing date: Apr 7, 1983
• Grant date: Feb 7, 1984
• Expiry date: Apr 7, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/128
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention provides a granulate comprising particles having sizes substantially within the range 0.15 to 1.25 mm, the granulate consisting of: PA1 (a) about 1 to 99 weight % of partially or completely hydrated sodium tripolyphosphate containing water of hydration in a proportion of at least about 10 weight %, based on the theoretically possible water content, the anhydrous sodium tripolyphosphate containing about 20 to 90 weight % of phase-I-material prior to its being hydrated, the balance being phase-II, and PA1 (b) about 99 to 1 weight % of a water-insoluble alumino silicate ion exchanger material of the general formula EQU (Cat.sub.2/n O).sub.x.Me.sub.2 O.sub.3.(SiO.sub.2).sub.y.zH.sub.2 O PA1 in which Cat stands for a calcium exchangeable cation with the valency n, x is 0.7 to 1.5, Me stands for boron or aluminum, y is 0.8 to 6, and z is 1.8 to 13.5. The invention also includes a spray process for making a granulate as just specified. The present granulate can be made with a particle size distribution which gives it particular utility as a detergent composition constituent.