Detergent builders and process for preparation thereof

Abstract From the Canadian patent

A detergent builder consisting essentially of an inorganic fine powder composed mainly of an alkali metal aluminosilicate having an X-ray diffraction pattern substantially same as that of zeolite of the type A and having a degree of crystallization in the range of from 35 to 75% wherein, said inorganic fine powder has a primary particle size smaller than 1 µ and a secondary particle size smaller than 4 µ said inorganic fine powder has, a buffer capacity (S) of at least 132 m?/100 g. of solids said buffer cap-, acity being expressed by an amount of hydrochloric acid necessary for lowering the pH of a 1% aqueous dispersion of said inorganic fine powder from 9.0 to 6.75 when said dispersion is …