| 摘要 |
PROBLEM TO BE SOLVED: To provide feed material containing hydroxyapatite.SOLUTION: Water and sulfuric acid are added to and dissolved into combustion ash of poultry bone, fish bone, or livestock feces such as poultry manure, swine dung, or cow dung, solid-liquid separation is performed, and calcium chloride is added to its filtrate to be stirred. Solid-liquid separation and filtration are repeated, slaked lime is added to its filtrate to be stirred for solid-liquid separation, the obtained hydroxyapatite in a wet (water-containing) state is dried by warm air blast, and a dried product of hydroxyapatite-containing feed material is obtained. |
