Process for producing enhanced alumina

Details Process for producing enhanced alumina Process for producing enhanced alumina

2011-08-30

2011-08-30

Silverman, Stanley (Department: 1736)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S420000, C423S600000

Reexamination Certificate

active

08007760

ABSTRACT:
The present invention provides an essentially dry method for preparation of enhanced alumina powders. The first step involves rapid calcination of an aluminum compound to produce alumina powder. The alumina powder is mixed with solid ammonium carbonate and a small amount of water. This mixture heats itself although some external heat is helpful to produce ammonium aluminum hydroxycarbonate (dawsonite-type) NH4AlCO3(OH)2upon curing which is then decomposed to produce enhanced alumina having a specific desired morphology and nano-sized dimensions.

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