The initial investigation for high-performance aluminum phosphate catalyst

The first report—powder preparation—

Abstract

Aluminum phosphate (AlPO₄) was prepared by the use of two processes that were precipitation method as a classical technique and alkoxide method as a novel approach. Aluminum nitrate hydrate and ortho-phosphoric acid aqueous solution were used as raw materials for precipitation method. Aluminum tri-i-propoxide and ortho-phosphoric acid anhydrous were used as starting materials for alkoxide method. 2-Methoxyethanol was used as solvent. The products in each process were dried for 24h at 393K and then were sintered for 3h at various temperatures in air. As a result of X-ray powder diffraction analysis, it was observed that crystallization occurred above 1273K in precipitation process, but 973K in alkoxide process.