Process for preparing materials having improved physical characteristics

Claim 1

IN A PROCESS FOR PREPARING A SILICEOUS AMINO COMPOUND IN AN AQUEOUS SYSTEM BY REACTING (1) A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PARTIAL AMIDE SALTS, AMINE ACID ADDITION SALTS, IMIDAZOLINE SALTS, OXAZOLINE SALTS AND QUATERNARY AMMONIUM SALTS WITH (2) AT LEAST STOICHIOMETRIC AMOUNTS OF A WATER-SOLUBLE SILICATE SALT SELECTED FROM THE CLASS CONSISTING OF SODIUM SILICATES, POTASSIUM SILICATES AND AMMONIUM SILICATES, AND THEREAFTER RECOVERING AND DRYING THE RESULTANT SILICEOUS AMINO COMPOUND, THE IMPROVEMENT WHICH COMPRISES INTRODUCING AT LEAST ONE WATER-SOLUBLE AROMATIC COMPOUND SELECTED FROM THE CLASS CONSISTING OF WATER-SOLUBLE SALTS OF ISOPHTHALIC ACID AND WATER-SOLUBLE SALTS OF TEREPHTHALIC ACID, SAID AROMATIC COMPOUND BEING INTRODUCED AT A POINT IN TIME PRIOR TO THE DRYING OF SAID SILICEOUS AMINO COMPOUND, (A) WITH THE PROVISO THAT WHEN SAID WATER-SOLUBLE AROMATIC COMPOUND IS PRESENT DURING FORMATION OF SAID SILICEOUS AMINO COMPOUND AND THE CORRESPONDING AROMATIC ACID OF SAID WATER-SOLUBLE AROMATIC COMPOUND DOES NOT REMAIN IN SAID SILICEOUS AMINO COMPOUND, MAINTAINING THE PH OF SAID AQUEOUS SYSTEM FROM ABOUT 7 TO ABOUT 9.5 DURING THE FORMATION OF SAID SILICEOUS AMINO COMPOUND AND THEREAFTER WASHING OUT SAID WATER-SOLUBLE AROMATIC COMPOUND, (B) WITH THE PROVISO THAT WHEN SAID WATER-SOLUBLE AROMATIC COMPOUND IS PRESENT DURING FORMATIN OF SAID SILICEOUS AMINO COMPOUND AND THE CORRESPONDING AROMATIC ACID OF SAID WATER-SOLUBLE AROMATIC COMPOUND REMAINS IN SAID SILICEOUS AMINO COMPOUND, MAINTAINING THE PH OF SAID AQUEOUS SYSTEM FROM 7 TO ABOUT 9.5 DURING THE FORMATION OF SAID SILICEOUS AMINO COMPOUND AND THEREAFTER LOWERING SAID PH TO FROM JUST BELOW ABOUT 7 TO ABOUT 3.0 WHEREUPON THE CORRESPONDING AROMATIC ACID OF SAID WATER-SOLUBLE AROMATIC COMPOUND PRECIPITATES IN AND AROUND THE PARTICLES OF SILICEOUS AMINO COMPOUND, AND (C) WITH THE PROVISO THAT WHEN SAID SILICEOUS AMINO COMPOUND IS FORMED IN THE ABSENCE OF SAID WATERSOLUBLE AROMATIC COMPOUND, MAINTAINING THE PH OF SAID AQUEOUS SYSTEM FROM ABOUT 6.5 TO ABOUT 9.5 DURING THE FORMATION OF SAID SILICEOUS AMINO COMPOUND AND THEREAFTER INTRODUCING SAID WATER-SOLUBLE AROMATIC COMPOUND AND ADJUSTING THE PH OF THE SYSTEM TO FROM JUST BELOW ABOUT 7 TO ABOUT 3.0 WHEREUPON THE CORRESPONDING AROMATIC ACID OF SAID WATERSOLUBLE AROMATIC COMPOUND PRECIPITATES IN AND AROUND THE PARTICLES OF SILICEOUS AMINO COMPOUND.