| abstract |
a) partial hydration of 10 to 60 parts by weight of an anhydrous sodium tripolyphosphate until the formation of 30 to less than 80 mole percent tripolyphosphate hexahydrate,n n n b) mixing the partial hydrate with 20 to 70 parts by weight of a powdered and essentially anhydrous sodium silicate (Na 2 O: Sio 2 = 1: 1 to 1: 4),n n n c) spraying the mixture with water or aqueous silicate solution,n n n d) granulation by agitation with subsequent crystallization, where appropriate further detergent components, bleaching agents or enzymes can be admixed, and addition of 1 to 5 percent by weight sodium acetate or 0.5 to 3 percent by weight dicalcium phosphate dihydrate or a mixture thereof as a tabletting aid by pressing a pressure of more than 70 kp / cm 2 to mechanically strong detergent tablets with high dissolution rate. |