Abstract: A method is provided for forming stable dispersions of boehmite alumina in water containing a peptizing acid by mixing said alumina with dilute aqueous acid solutions and treating the alumina prior to dispersion by heating at temperatures of from about 250.degree. F. to 700.degree. F. and pressures of from about 10 psig to about 2000 psig in the presence of up to 80 weight percent of water based upon the total alumina for a period of time sufficient to stabilize the alumina to the extent necessary. Dispersions can be prepared which will remain fluid up to days longer than will those prepared from the untreated alumina.

Abstract: Alumina slurries are stabilized to prevent thickening and gelling by digesting dried alumina powder in hot water for a time sufficient to stabilize the alumina. The digested alumina is then recovered and dispersed in water containing a small amount of peptizing agent. The slurries so prepared have a low rate of thickening and gelling time is greatly extended.