Method of mechanical dishwashing and compositions

摘要

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 (M2/nO)x x Me2O3 x (SiO2)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.