Process for preparing aluminum phosphate dispersion and process of treating pile fabric with the resulting dispersion

Claim 2

A PROCESS FOR PREPARING A STABLE AQUEOUS DISPERSION COMPRISING REACTING IN AN AQUEOUS MEDIUM A WATER-SOLUBLE ALUMINUM SALT AND AT LEAST ITS STOICHIOMETRIC EQUIVALENT OF A WATER-SOLUBLE ORTHOPHOSPHATE TO PRODUCE A SLURRY CONTAINING AN ALUMINUM PHOSPHATE PRECIPITATE, FILTERING THE PRECIPITATE, WASHING THE FILTER CAKE WITH WATER IN AN AMOUNT BETWEEN 10 AND ABOUT 75% OF THE VOLUME OF THE SLURRY, DISPERSING THE FILTER CAKE IN WATER BY MEANS OF A WATER-SOLUBLE PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF A METAPHOSPHATE, A PYROPHOSPHATE AND A POLYPHOSPHATE, ADJUSTING THE PH OF THE DISPERSION TO BETWEEN 4 AND 10.5 AND THEREAFTER MILLING THE DISPERSION WHEREBY A DISPERSION IS PROVIDED, THE MAJOR PORTION OF THE PARTICLES OF WHICH ARE 1.0 MICRON AND LESS IN DIAMETER.

Claim 3

A PROCESS FOR PREPARING A STABLE AQUEOUS DISPERSION COMPRISING REACTING IN AN AQUEOUS MEDIUM A WATER-SOLUBLE ALUMINUM SALT AND AT LEAST THE STOICHIOMETRIC EQUIVALENT OF A WATER-SOLUBLE ORTHOPHOSPHATE, TO PRODUCE A SLURRY CONTAINING AN ALUMINUM PHOSPHATE PRECIPITATE, DISPERSING THE PRECIPITATE BY MEANS OF FROM 40 TO 70% BASED ON THE TOTAL WEIGHT OF THE SLURRY, OF A WATER-SOLUBLE PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF A METAPHOSPHATE, A PYROPHOSPHATE, AND A POLYPHOSPATE, ADDING TO THE SLURRY BETWEEN 3/4 AND 11/4% BASED ON THE WEIGHT OF THE SLURRY, OF A FLOCCULATING AGENT, FILTERING THE SLURRY, WASHING THE FILTER CAKE WITH AN AMOUNT OF WATER EQUAL TO BETWEEN 10 AND 50% OF THE VOLUME OF THE SLURRY, DISPERSING THE FILTER CAKE IN WATER, ADJUSTING THE PH OF THE DISPERSION TO BETWEEN 5.5 AND 8.5 AND THEREAFTER MILLING THE DISPERSION, WHEREBY A DISPERSION IS PROVIDED, THE MAJOR PORTION OF THE PARTICLES OF WHICH ARE 1.0 MICRON AND LESS IN DIAMETER.

Claim 4

A PROCESS FOR PREPARING A STABLE AQUEOUS DISPERSION COMPRISING REACTING IN AN AQUEOUS MEDIUM A WATER-SOLUBLE ALUMINUM SALT AND AT LEAST THE STOICHIOMETRIC EQUIVALENT OF A WATER-SOLUBLE ORTHOPHOSPHATE, TO PRODUCE A SLURRY CONTAINING AN ALUMINUM PHOSPHATE PRECIPITATE, DISPERSING THE PRECIPITATE BY MEANS OF FROM 40 TO 70% BASED ON THE TOTAL WEIGHT OF THE SLURRY, OF A WATER-SOLUBLE PHOSPHATE SELECTED FROM THE GROUP CONSISTING OF A METAPHOSPHATE, A PYROPHOSPHATE, AND A POLYPHOSPATE, ADDING TO THE SLURRY BETWEEN 3/4 AND 11/4% BASED ON THE WEIGHT OF THE SLURRY, OF A FLOCCULATING AGENT, FILTERING THE SLURRY, WASHING THE FILTER CAKE WITH AN AMOUNT OF WATER EQUAL TO BETWEEN 10 AND 50% OF THE VOLUME OF THE SLURRY, DISPERSING THE FILTER CAKE IN WATER, ADJUSTING THE PH OF THE DISPERSION TO BETWEEN 5.5 AND 8.5 AND THEREAFTER MILLING THE DISPERSION, WHEREBY A DISPERSION IS PROVIDED, THE MAJOR PORTION OF THE PARTICLES OF WHICH ARE 1.0 MICRON AND LESS IN DIAMETER.