Aluminum hydroxide-metal hydroxide antacid and process of making the same

Claim 1

A PROCESS FOR PREPARING AN ANTACID CAPABLE, AS DETERMINED BY THE HOLBERT, NOBLE AND GROTE MODIFIED TEST METHOD, OF MAINTAINING THE PH OF ARTIFICIAL GASTRIC JUICE WITHIN THE RANGE FROM ABOUT 3 TO ABUT 5 FOR AT LEAST ONE HOUR, WHICH COMPRISES MIXING IN WATER ALUMINUM CHLOROHYDROXIDE CONTAINING FROM ONE TO FOUR CHLORINE ATOMS PER MOLECULE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF NONTOXIC OXIDES, HYDROXIDES, SULFATES, CHLORIDES, NITRATES, SUBCARBONATES, CARBONATES AND BICARBONATES OF THE ALKALINE EARTH METALS AND BISMUTH IN PROPORTIONS TO PROVIDE A GEL MIXTURE OF ALUMINUM HYDROXIDE GEL AND A HYDROXIDE GEL SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METAL HYDROXIDES AND BISMUTH HYDROXIDE IN A MOLECULAR WEIGHT RATIO CALCULATED AS O:AL2O3 WITHIN THE RANGE FROM ABOUT 1:20 TO ABOUT 10:1, WHERE M IS SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METALS AND BISMUTH ADJUSTING THE PH TO WITHINTHE RANGE FROM ABOUT 5 TO ABOUT 9 AT WHICH A COGEL PRECIPITATES.