A process to form fluoroapatite particles from hydroxyapatite particles

摘要

A process to form fluoroapatite particles comprising reacting hydroxyapatite primary particles having hydroxyl groups and hydrogen fluoride molecules having fluorine atoms so that at least one of hydroxyl groups of hydroxyapatite primary particles are substituted by the fluorine atoms of the hydrogen fluoride molecules and drying the product thereof. The fluoroapatite dried particles can exhibit superior acid resistance. Further, an adsorption apparatus using such fluoroapatite dried particles is provided.