Patent ID: 6844310
Filing Date: 2005-01-18
Classification: C11D

Abstract:
1. A process for preparing a builder composition consisting of contacting: a) crystalline sheetlike sodium silicate of the formula NaMSi b) water and c) sulfuric acid or salt thereof having a releasable H where a molar ratio of the crystalline sheetlike sodium silicate a) to the total amount of the releasable H + of the sulfuric acid or salt thereof c) is 15:1 to 550:1 and a molar ratio of the water b) to the total amount of the releasable H + of the sulfuric acid component c) is 3:1 to 1 000:1, and wherein said builder composition undergoes heat treating or compacting, and a step selected from the group consisting of grinding, fractionating to size, and combinations thereof to provide said builder composition having 7-21% by weight of alpha-sodium disilicate, 0-12% by weight of beta-sodium disilicate, and 65-95% by weight of delta-sodium disilicate.