| 摘要 |
<p>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 (3001,200.degree.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.</p> |
