GRANULAR BUILDER PRODUCT

摘要

A granular product comprises co-granules of an alkali metal silicate and a builder salt wherein the granules contain an amount of a bicarbonate which is such that when the granular product is dissolved in distilled water as a 1 % solution there is no observable opalescence. The use of bicarbonate allows the incorporation of above 28 %, e.g. above 30 %, silicate (expressed as disilicate) in the granule. The granules may be produced by dry blending the bicarbonate and builder salt, adding to the dry blend a solution of the alkali metal silicate, and effecting agglomeration of the mixture. If necessary the agglomerates are then dried.