The production mannered null wollastonite of the solid material which is converted to porous apatite (the wollastonite

摘要

PROBLEM TO BE SOLVED: To easily produce a solid having porous apatite to be utilized as an adsorbent for vital high polymer or vital org. noxious org. or inorg. ions, a medicine slow releasing carrier and a carrier of microorganisms and enzyme on at least its surface layer without allowing the material to undergo a high- temp. process. ;SOLUTION: The calcium-contg. solid material is brought into contact with an aq. soln, contg. phosphoric acid ions and having a pH of ≥7.0. The calcium- contg. solid material which is a starting raw material may be any among natural raw materials, such as limestone, wollastonite, shells, sea urchin shells and corals or artificial raw materials, such as calcium silicate hydrate consisting essentially of autoclave cured and formed tobermolite or lysolite, hydration cured matter of gypsum, hydration cured matter of Portland cement and hydration cured matter of alumina cement, or the raw materials formed by adding aggregate and reinforcing materials thereto. The starting raw material may be in any of powder and granular, crushed, fibrous, planar and block forms, etc.;COPYRIGHT: (C)1999,JPO