PURPOSE: To obtain the porous phosphorus compd. grain assemblage contg. only globular grains and appropriate for a cell separating agent by charging a slurry of a calcium phosphate compd. free of an org. binder into a vessel having an inclined rotating shaft, and rotating the vessel while heating the vessel.
CONSTITUTION: The vessel 1 is obliquely arranged in a water tank 6, a vessel lid 2 also used as a supporting rod is provided on the top of the vessel 1, and the lid 2 is rotatably supported by a bearing 3 and a holder 5. The slurry 7 of a phosphorus compd. (e.g. hydroxyapatite) free of an org. binder is charged into the vessel 1, heated above room temp., and rotated by a motor 4. By this method, the assemblage of the globular porous phosphorus compd. grains having 20-5000μm average grain diameter, 0.01-1 ml/g total pore volume, 5-100m2/g specific surface, 10-200nm central pore diameter, 0.1-5kg/mm2 compressive strength, 0.4-2.5 bulk density, and 1-85% average porosity is obtained.
EGAWA KAZUFUMI
YOSHIZAWA MASAO
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