Calcium acetate monohydrate was a common starting material for the synthesis of acetone prior to the development of the cumene process due to its low cost: Layered mesostructured calcium phosphate was prepared using phosphoric acid (85% H3PO4) and calcium acetate monohydrate (Ca(CH3COO)2·H2O) in the presence of n-hexadecylamine (C16H33NH2). Add C16H33NH2 (2.41 g) and 85% H3PO4 (1.15 g) to a mixed solvent of EtOH (18.4 g) and H2O (6.6 g). After stirring at room temperature for 1 h, Ca(CH3COO)2 H2O (1.76 g) and ammonia solution (25% NH3 aq.) (0.34 g) were introduced into the surfactant solution. The mixture was vigorously stirred for 15 min and then allowed to stand at room temperature for 120 h. The solid product was filtered, washed with ethanol, and air dried.