Abstract: In the feeding of non-protein nitrogen (NPN) compounds such as urea to ruminants, the NPN compound is decomposed to ammonia in the rumen. To mitigate against toxic effects of the resulting high ammonium ion content of the ruminal fluid, a zeolite, or crystalline alumino silicate cation exchange material, is introduced into the rumen and maintained therein so that ammonium ions formed by NPN decomposition are accumulated during the post-feeding fermentation period, and later released by the regenerant action of saliva entering the rumen during rumination.

Abstract: Dried amorphous aluminum hydroxide gels having substantial acid reacting capability over an extended period of time are prepared by drying the gel after contacting the aqueous liquid gel with an inert organic solvent of sufficient solubility in water to replace water in the gel. The dried gel product and pharmaceutical compositions comprising the gel are also novel.

Abstract: Stable dried aluminum hydroxide gels possessing the high acid reactivity of liquid aluminum hydroxide gel are prepared by drying the gel from non-aqueous solvents.