C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
23/248
C01F 7/02 (2006.01)
Patent
CA 1325708
ABSTRACT OF THE DISCLOSURE Disclosed is a composition of matter comprising particles, each particle containing boehmite and gamma and/or X-ray indifferent alumina pseudomorphous with aluminum hydroxide, an absence of alpha-alumina, and having a reduced amount of parallel fissuring as compared to alumina from atmospheric pressure calcination of aluminum hydroxide, each particle containing a plurality of crystals, the LOI (300- 1,200°C) of the particles being from 1 to 12%, their surface area being 10-100 m2/g. Also disclosed is a process for producing the composition by removing water from Al(OH)3 in a decomposer at a pressure higher than one atmospheric gage pressure. The product is stronger than alumina produced by calcining at atmospheric pressure.
616295
Misra Chanakya
Sucech Steven William
Aluminum Company Of America
Smart & Biggar
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