Method of mechanical dishwashing and compositions

US4071377A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien (Henkel KGAA) · DE

Inventors

• Milan J. Schwuger · Haan, DE
• Heinz Smolka · Langenfeld, DE
• Theodor Altenschopfer · Düsseldorf, DE
• Manfred Rostek · Düsseldorf, DE

Key dates

• Filing date: Apr 5, 1974
• Grant date: Jan 31, 1978
• Expiry date: Apr 5, 1994

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/24
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method for the mechanical washing of dishes, wherein the soiled dishes are treated with an aqueous alkaline liquor having a pH of from 8 to 13 which contains at least one compound inhibiting alkaline earth metal ion precipitation, rinsing and recovering cleaned dishes comprising using finely-dispersed, water-insoluble silicate compounds having a calcium-binding power of at least 50 mg CaO/gm of anhydrous substance and having the formula, combined water not shown, of EQU (M.sub.2/n O).sub.x .multidot. Me.sub.2 O.sub.3 .multidot. (SiO.sub.2).sub.y where M is a cation of the valence n, exchangeable with calcium, x is a number of from 0.7 to 1.5, Me is a member selected from aluminum and boron and y is a number of from 0.8 to 6, as said compound inhibiting alkaline earth metal ion precipitation as well as alkaline-reacting mechanical dish washing compositions containing said silicate compounds.