Process for manufacturing highly active, dispersed low apparent density aluminum hydrate and shaped components made of low apparent density aluminum oxide, and process for manufacturing said shaped components

Abstract From the Canadian patent

The invention relates to a process for manufacturing highly active, dispersed aluminum hydroxide, of low apparent density . First, unground, very fine, grained aluminum tri-hydroxide of which more than 99 % of, the grains are at most 3 µm in size is introduced conti-, nuously into a reactor along with a stream of hot dry air is whirled up and strongly dispersed, heated to 400-600°C and shock dehydrated. The low apparent density aluminum oxide flowing out of the reactor in the hot air stream is precipitated out by suitable mechanical means dispersed in, mildly acidic or mildly basic water and rehydrated with the aid of heating. The invention also relates to shaped components of highly …