Patent ID: 8070079
Filing Date: 2011-12-06
Classification: B82Y,C01F,C01P,C09C

Abstract:
1. A process for producing nanosize α-alumina comprising the steps of mixing aluminum chlorohydrate as an aqueous solution with crystallization nuclei to form agglomerates of α-alumina, wherein the aluminum chlorohydrate is of the formula Al 2 (OH) x Cl y , wherein x is 2.5 to 5.5, y is 0.5 to 3.5 and x+y is 6; drying the agglomerates of α-alumina; heat treating the agglomerates of α-alumina; and deagglomerating the agglomerates of α-alumina by milling the agglomerates of α-alumina in the presence of an organic solvent and simultaneously or subsequently treated with a silane.