Patent ID: 7147832
Filing Date: 2006-12-12
Classification: C01B,C01G,C01P,C22B,Y02P

Abstract:
1. A process for preparing a peroxide compound of zirconium comprising: combining a zirconium species, a sulfate ion species and hydrogen peroxide to provide an acidic peroxide solution containing zirconium and sulfate, said solution having a concentration of zirconium of not less than 0.3 g-atom/liter, a sulfate/zirconium molar ratio of greater than about 1:2, a hydrogen peroxide/zirconium molar ratio of greater than about 3:2, and an acidity of less than about 7 N total acid per g-atom of zirconium; agitating and maintaining the acidic peroxide solution at a temperature of not higher than about 60° C. to provide a precipitate comprising particles of zirconium peroxosulfate; followed by separating and washing the precipitate, wherein said process provides recovery in the form of the peroxide compound of zirconium of at least 25% by weight of the zirconium contained in the acidic peroxide solution within 24 hours after preparing said acidic peroxide solution of zirconium.