FR2419254A1 - PROCESS FOR THE PRODUCTION OF HYDROXYAPATITE AND SYNTHETIC BONE ASH OBTAINED FROM THIS HYDROXYAPATITE - Google Patents

PROCESS FOR THE PRODUCTION OF HYDROXYAPATITE AND SYNTHETIC BONE ASH OBTAINED FROM THIS HYDROXYAPATITE

Info

Publication number
FR2419254A1
FR2419254A1 FR7906111A FR7906111A FR2419254A1 FR 2419254 A1 FR2419254 A1 FR 2419254A1 FR 7906111 A FR7906111 A FR 7906111A FR 7906111 A FR7906111 A FR 7906111A FR 2419254 A1 FR2419254 A1 FR 2419254A1
Authority
FR
France
Prior art keywords
hydroxyapatite
porcelain
bone ash
synthetic bone
production
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7906111A
Other languages
French (fr)
Other versions
FR2419254B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brit Charcoals & Macdonalds
Original Assignee
Brit Charcoals & Macdonalds
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brit Charcoals & Macdonalds filed Critical Brit Charcoals & Macdonalds
Publication of FR2419254A1 publication Critical patent/FR2419254A1/en
Application granted granted Critical
Publication of FR2419254B1 publication Critical patent/FR2419254B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
    • C01B25/322—Preparation by neutralisation of orthophosphoric acid
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/24—Manufacture of porcelain or white ware

Abstract

Une hydroxyapatite est produite par la mise en contact en continu d'un courant d'une bouillie de chaux hydratée avec un courant d'acide phosphorique à 60 % en poids environ au moins, dans un rapport approximativement stoechiométrique de 10 Ca(OH)2 à 6 H3 PO4 et à une température d'environ 80 à environ 85 degrés C, à un pH contrôlé du mélange réactionnel compris entre 9,0 environ et 11,0 environ; on calcine cette hydroxyapatite à une température d'au moins 1 000 degrés C, ce qui donne une cendre d'os synthétique. Cette dernière est utilisable dans la fabrication de porcelaine d'os (également appelée porcelaine anglaise ou porcelaine phosphatique), produit qui occupe une place très importante dans l'industrie de la céramique.A hydroxyapatite is produced by continuously contacting a stream of hydrated lime slurry with a stream of phosphoric acid at least about 60% by weight, in an approximately stoichiometric ratio of 10 Ca (OH) 2 at 6 H3 PO4 and at a temperature of about 80 to about 85 degrees C, at a controlled pH of the reaction mixture of between about 9.0 and about 11.0; this hydroxyapatite is calcined at a temperature of at least 1000 degrees C, resulting in synthetic bone ash. The latter can be used in the manufacture of bone porcelain (also called English porcelain or phosphate porcelain), a product which occupies a very important place in the ceramics industry.

FR7906111A 1978-03-10 1979-03-09 PROCESS FOR THE PRODUCTION OF HYDROXYAPATITE AND SYNTHETIC BONE ASH OBTAINED FROM THIS HYDROXYAPATITE Granted FR2419254A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB952778A GB1586915A (en) 1978-03-10 1978-03-10 Synthetic bone ash

Publications (2)

Publication Number Publication Date
FR2419254A1 true FR2419254A1 (en) 1979-10-05
FR2419254B1 FR2419254B1 (en) 1984-12-14

Family

ID=9873732

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7906111A Granted FR2419254A1 (en) 1978-03-10 1979-03-09 PROCESS FOR THE PRODUCTION OF HYDROXYAPATITE AND SYNTHETIC BONE ASH OBTAINED FROM THIS HYDROXYAPATITE

Country Status (5)

Country Link
JP (1) JPS5924726B2 (en)
FR (1) FR2419254A1 (en)
GB (1) GB1586915A (en)
NL (1) NL7901959A (en)
SE (1) SE438665B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265945A2 (en) * 1986-10-31 1988-05-04 Asahi Kogaku Kogyo Kabushiki Kaisha Process for producing calcium phosphate
US6827441B2 (en) 2002-01-31 2004-12-07 Opticlear Inc. Progressive lens with reduced distortion
US9256083B2 (en) 2011-09-22 2016-02-09 Ocular Technology Inc. Multi-focal lens

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4324772A (en) * 1980-11-19 1982-04-13 Monsanto Company Process for producing hydroxyapatite
JPS646213A (en) * 1987-06-27 1989-01-10 Sangi Kk Composition for preventing denting caries
GB8811829D0 (en) * 1988-05-19 1988-06-22 Unilever Plc Oral compositions
GB8811828D0 (en) * 1988-05-19 1988-06-22 Unilever Plc Oral compositions
GB8811830D0 (en) * 1988-05-19 1988-06-22 Unilever Plc Oral compositions
JP7454158B2 (en) * 2019-02-07 2024-03-22 株式会社バイオアパタイト Fired body and its manufacturing method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379541A (en) * 1964-02-18 1968-04-23 Monsanto Co Alkaline earth metal hydroxylapatites, processes for preparing the same and compositions containing the same
DE1667836A1 (en) * 1968-03-05 1971-06-16 Kalk Chemische Fabrik Gmbh Process for the production of finely divided apatites
GB1395037A (en) * 1972-10-10 1975-05-21 Doulton & Co Ltd Bone china

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379541A (en) * 1964-02-18 1968-04-23 Monsanto Co Alkaline earth metal hydroxylapatites, processes for preparing the same and compositions containing the same
DE1667836A1 (en) * 1968-03-05 1971-06-16 Kalk Chemische Fabrik Gmbh Process for the production of finely divided apatites
GB1395037A (en) * 1972-10-10 1975-05-21 Doulton & Co Ltd Bone china

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CA1969 *
EXBK/70 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265945A2 (en) * 1986-10-31 1988-05-04 Asahi Kogaku Kogyo Kabushiki Kaisha Process for producing calcium phosphate
EP0265945A3 (en) * 1986-10-31 1989-02-01 Asahi Kogaku Kogyo Kabushiki Kaisha Process for producing calcium phosphate
US4897250A (en) * 1986-10-31 1990-01-30 Asahi Kogaku Kabushiki Kaisha Process for producing calcium phosphate
US6827441B2 (en) 2002-01-31 2004-12-07 Opticlear Inc. Progressive lens with reduced distortion
US9256083B2 (en) 2011-09-22 2016-02-09 Ocular Technology Inc. Multi-focal lens

Also Published As

Publication number Publication date
JPS5924726B2 (en) 1984-06-12
GB1586915A (en) 1981-03-25
JPS54152009A (en) 1979-11-29
SE7902098L (en) 1979-09-11
SE438665B (en) 1985-04-29
FR2419254B1 (en) 1984-12-14
NL7901959A (en) 1979-09-12

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Legal Events

Date Code Title Description
ST Notification of lapse