Alumina dispersion behavior
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United States of America Patent
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Nov 23, 1982
Issued Date -
N/A
app pub date -
Aug 14, 1981
filing date -
Sep 4, 1979
priority date (Note) -
Expired
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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.
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