Detergent builder

US4668420A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Manfred Diehl · Frankfurt am Main, DE
• Roland Bergmann · Großkrotzenburg, DE

Key dates

• Filing date: Jan 21, 1986
• Grant date: May 26, 1987
• Expiry date: Jan 21, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/33
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A granulated detergent builder is disclosed comprising: PA0 65 to 85 weight percent of a water insoluble silicate capable of binding calcium, in the form of a finely dispersed, bound-water-containing, synthetically produced, water insoluble crystalline compound having the general formula: EQU (Cat.sub.2/n O).sub.x.Me.sub.2 O.sub.3.(SiO.sub.2).sub.y (I), PA0 in which Cat is a cation exchangeable with calcium with the valency n, x is a number from 0.7 to 1.5, Me is boron or aluminum, and y a number from 0.8 to 6, PA0 4 to 10 weight percent sodium nitrilotriacetate PA0 1.5 to 3 weight percent nonionic surfactant PA0 0 to 1 weight percent alkali PA0 0.5 to 1.5 weight percent carboxymethyl cellulose and/or methylcellulose PA0 and the balance is water. The product can be produced by spray drying an aqueous suspension in which all ingredients are dispersed or dissolved.