METHOD OF TREATING BONE CHARCOAL, PRODUCT OF SAID METHOD, METHOD OF EXTRACTING APATITE FROM UNTREATED BONE OR BONE ASH, AND APATITIC MATERIAL

WIPO Patent Application WO/1996/037433

A1

Apatite is obtained by carbonizing animal bones to prepare bone charcoal, pulverizing the bone charcoal to prepare bone charcoal powder, mixing the powder with an acid under stirring followed by the separation of the first activated charcoal from a supernatant, adding the supernatant to an alkali solution for neutralization followed by the separation of the first apatite thus precipitated from a supernatant, adding an acid to the first activated charcoal under stirring followed by leaving of the resulting mixture to stand still and separation of the second activated charcoal thus precipitated from a supernatant, adding the supernatant to an alkali solution for neutralization followed by the separation of the second apatite thus precipitated from a supernatant, adding an acid to the second activated charcoal under stirring followed by leaving of the resulting mixture to stand still and separation of the third activated charcoal thus precipitated from a supernatant, and adding the supernatant to an alkali solution for neutralization followed by the separation of the third apatite thus precipitated from a supernatant.

NAMIKI HIDEO (JP)

PCT/JP1996/001352

November 28, 1996

May 22, 1996

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ADVANCE CO LTD (JP)
FRONTIER KK (JP)
NAMIKI HIDEO (JP)

C01B25/32; (IPC1-7): C01B25/32

JPH02188415A	1990-07-24
JPH0485548A	1992-03-18
JPH0857067A	1996-03-05
JPH08183243A	1996-07-16
JPH0662921A	1994-03-08
JPH0543212A	1993-02-23
JPH0229497A	1990-01-31
JPH0532450A	1993-02-09
JPH03262511A	1991-11-22
JPH05309266A	1993-11-22
JPH07289886A	1995-11-07
JPS614588A	1986-01-10

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