| abstract |
Crystalline stratified sodium silicates in compacted form have the formula NaMSixO2x+1.yH2O, in which M stands for sodium or hydrogen, x equals 1.9 to 4, preferably 2, 3 or 4, and y equals 0 to 20. In order to improve the solubility of these silicates, they are prepared by roller compacting a mixture of 95 to 99.8 % by weight crystalline stratified silicates and 0.2 to 5 % by weight usual ingredients of washing or cleaning agents as auxiliary substances. |