Stable aqueous suspensions of detergent zeolites and four oxo-alcohol ethoxylates

US5174918A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

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

Key dates

• Filing date: Apr 10, 1990
• Grant date: Dec 29, 1992
• Expiry date: Apr 10, 2010

Classification

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

Abstract

A stable, pumpable, aqueous solution of a water-insoluble silicate capable of binding calcium ion is shown which, referred to the total weight of the aqueous suspension, contains PA1 A) 0.5 to 80% by weight of a finely divided, synthetic water-insoluble compound containing bound water and in the form of a silicate capable of binding calcium and of the formula: EQU (Cat.sub.2/n O).sub.s.Me.sub.2 O.sub.3 (SiO.sub.2).sub.y PA1 where Cat is an n-valent cation exchangeable with calcium, x is number from 0.7 to 1.5, Me is boron or aluminum and y is number from 0.8 to 6, and PA1 B) 0.5 to 6% by weight of a mixture acting as the dispersing ingredient and formed of at least two oxo-alcohol ethoxylates of formula: EQU R--(OCH.sub.2 CH.sub.2).sub.n --OH PA1 where R--C.sub.10 --C.sub.15 alkyl with a maximum branching rate of 25%, that is, at most 25% of the fatty alcohol ethoxylate comprises single methyl branching, PA1 n=3-5.0 moles of ethylene oxide for component 1, PA1 n=5.5-7 moles of ethylene oxide for component 2. The suspension can be used in manufacturing powdered detergents and cleaning agents.