| abstract |
Disclosed is a process for preparing a water softening composition which comprises the steps of: n (a) applying to finely divided solid carrier particles of an inorganic material selected, e.g., from the group consisting of aluminosilicates having an Al 2 O 3 content of from 1 to 75% by mole, kieselguhr, a silicic acid composition containing 67 mole % of SiO 2 , 1 mole % of Al 2 O 3 and 278 mole % of H 2 O, a silica gel containing 12.24% of SiO 2 , 7.35% of N 2 SO 4 , 0.41% of Na 2 O and 80% of H 2 O, aluminum oxide, alumina hydrate, bentonite and sodium sulfate, a solution of sodium aluminate having a concentration of from about 0.2% to 25% by weight and a molar ratio Na 2 O/Al 2 O 3 of from about 0.3 to 47, in an amount which is sufficient to coat the particles with an outside layer of sodium aluminate amounting from about 0.5 to about 50% by weight of the particles; and, (b) drying the coated particles at a temperature of from about 20° to 120° C. to a residual moisture content of from about 5% to 30% by weight. Also disclosed are the resulting water softening compositions and method of using same. |