Preparation of dicalcium phosphate dihydrate from cattle bone

Abstract

The objective of this study was to prepare dicalcium phosphate dihydrate from cattle bone by selective precipitation of bone ash solution under various conditions of Ca/P mole ratio, pH and temperature. The procedure started from cleaning the bone, degreasing by boiling, calcining, milling to bone ash powder and dissolving into solution. The obtained alpha-tricalcium phosphate. The optimum condition for dicalcium phosphate dihydrate was precipitation under pH 4.5-5.5 at room temperature and Ca/P mole ratio had no effect on the precipitation. Alpha-tricalcium phosphate and beta-tricalcium phosphate were the only products from the calcination of dicalcium phosphate dihydrate and CaC0₃ at 1200°c for 3h.