... Al(OH)3, ATH, sometimes erroneously called Hydrate of alumina, is found in nature as the mineral gibbsite (also ... known as activated alumina and is used as a desiccant, an adsorbent, in gas purification, as a Claus catalyst support, ... supfate, polyaluminium chloride, aluminium chloride, zeolites, sodium aluminate, activated alumina, aluminium nitrate Use as a fire retardant:Aluminium hydroxide also ...