Glassy phosphate powder composition and process of making the same

Claim 1

A WATER TREATING COMPOSITION CONSISTING ESSENTIALLY OF A SODIUM PHOSPHATE GLASS HAVING A MOLAR RATIO OF SODIUM OXIDE TO PHOSPHORUS PENTOXIDE BETWEEN ABOUT 0.9;1 AND ABOUT 1.7;1, THE PARTICLES OF SAID GLASS HAVING ON THEIR SURFACES AN ACIDIC REVERSION PRODUCT OF THE CHARACTER OBTAINABLE BY HYDRATING THE SURFACES OF THE SODIUM PHOSPHATE GLASS AT A TEMPERATUE OF FROM ABOUT 20*C. TO ABOUT 150*C. UNTIL AN AMOUNT OF MOISTTURE EQUIVALENT IN WEIGHT TO ABOUT 0.5 TO ABOUT 6.0 PER CENT OF THE WEIGHT OF THE PHOSPHATE GLASS HAS BEEN ABSORBED THEREON, AND THEN PARTIALLY DEHYDRATING THE PARTIALLY HYDRATED PARTICLES BY SUBJECTING THEM TO SUBSTANTIALLY MOISTURE-FREE AIR AT A TEMPERATURE OF ABOUT 70*C. TO ABOUT 500*C. UNTIL THE MOISTURE REMAINING CONSTITUTES FROM ABOUT 0.05 TO ABOUT 2.5 PER CENT OF THE WEIGHT OF THE PARTICLES, AND A POWDERED CARBONATE OF SODIUM WHICH RELEASES A GAS WHEN REACTED IN WATER SOLUTIONS WITH SAID TREATED PHOSPHATE GLASS, SAID WATER TREATING COMPOSITION BEING CHARACTERIZED BY A HIG RATE OF SOLUTION IN WATER.