FR2399974A1 - Procede de preparation d'hydrogenophosphate de calcium anhydre cristallin approprie comme substance brute pour former des substances luminescentes a base de phosphate - Google Patents

Procede de preparation d'hydrogenophosphate de calcium anhydre cristallin approprie comme substance brute pour former des substances luminescentes a base de phosphate

Info

Publication number
FR2399974A1
FR2399974A1 FR7823391A FR7823391A FR2399974A1 FR 2399974 A1 FR2399974 A1 FR 2399974A1 FR 7823391 A FR7823391 A FR 7823391A FR 7823391 A FR7823391 A FR 7823391A FR 2399974 A1 FR2399974 A1 FR 2399974A1
Authority
FR
France
Prior art keywords
cahpo4
anhydrous calcium
luminescent substances
phosphate
preparing crystalline
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
FR7823391A
Other languages
English (en)
Other versions
FR2399974B1 (fr
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.)
Central Glass Co Ltd
Original Assignee
Central Glass Co Ltd
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
Priority claimed from JP9467277A external-priority patent/JPS5811361B2/ja
Priority claimed from JP9467377A external-priority patent/JPS5811362B2/ja
Application filed by Central Glass Co Ltd filed Critical Central Glass Co Ltd
Publication of FR2399974A1 publication Critical patent/FR2399974A1/fr
Application granted granted Critical
Publication of FR2399974B1 publication Critical patent/FR2399974B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
    • C09K11/71—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus also containing alkaline earth metals
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Luminescent Compositions (AREA)

Abstract

L'invention concerne un procédé de préparation d'hydrogénophosphate de calcium anhydre. Ce procédé comprend la précipitation de CaHPO4. 2H 2 O en mélangeant des solutions aqueuses de NaNH4 HPO4 4H 2 O et de CaCl2. 6H2 O à 5-40 degrés C. Une quantité complète de CaHPO4. 2 H2 O à convertir en CaHPO4 en un lot est versée dans une eau acidifiée maintenue à une température supérieure à 80 degrés C en une seule fois. Le CaHPO4 cristallin est obtenu par agitation d'une bouillie chaude résultante pendant quelques minutes. La forme du cristal du produit dépend du pH de l'eau chaude : des plaques en forme de losange lorsque le pH est inférieur à 3,4, des plaques en forme de parallélogramme dans le domaine de pH compris entre 3,4 et 4,4, et des plaques carrées ou rectangulaires lorsque le pH est supérieur à 4,4. La dimension de particules de CaHPO4 dépend de la température de l'eau et du degré de l'agitation. La précipitation de CaHPO4. 2H 2 O en présence d'une quantité appropriée de cristaux de semence est efficace pour rendre minimale la teneur en sodium de CaHPO4 . L'invention s'applique à la préparation de substances luminescentes à base de phosphate.
FR7823391A 1977-08-09 1978-08-08 Procede de preparation d'hydrogenophosphate de calcium anhydre cristallin approprie comme substance brute pour former des substances luminescentes a base de phosphate Granted FR2399974A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9467277A JPS5811361B2 (ja) 1977-08-09 1977-08-09 純粋な無水リン酸二石灰の製造法
JP9467377A JPS5811362B2 (ja) 1977-08-09 1977-08-09 無水リン酸二石灰の製造法

Publications (2)

Publication Number Publication Date
FR2399974A1 true FR2399974A1 (fr) 1979-03-09
FR2399974B1 FR2399974B1 (fr) 1981-10-16

Family

ID=26435944

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7823391A Granted FR2399974A1 (fr) 1977-08-09 1978-08-08 Procede de preparation d'hydrogenophosphate de calcium anhydre cristallin approprie comme substance brute pour former des substances luminescentes a base de phosphate

Country Status (4)

Country Link
US (1) US4203955A (fr)
DE (1) DE2834532C3 (fr)
FR (1) FR2399974A1 (fr)
GB (1) GB2002337B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721615A (en) * 1986-05-05 1988-01-26 Monsanto Company Calcium phosphates
JP6164628B1 (ja) 2017-03-30 2017-07-19 富田製薬株式会社 無水リン酸水素カルシウム、及びその製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296494A (en) * 1939-09-14 1942-09-22 Blockson Chemical Co Manufacture of anhydrous di-calcium phosphate
US3429625A (en) * 1966-08-11 1969-02-25 Lucas Industries Ltd Hydrostatic bearings
US3635660A (en) * 1969-02-05 1972-01-18 Thorn Electrical Ind Ltd Phosphate and phosphors prepared therefrom
US3927180A (en) * 1972-12-08 1975-12-16 Gte Sylvania Inc Method of converting brushite to monetite crystals with controlled variation in crystal habit
FR2299269A1 (fr) * 1975-01-29 1976-08-27 Central Glass Co Ltd Procede pour la preparation de phosphate secondaire de calcium anhydre

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095269A (en) * 1960-10-12 1963-06-25 Sylvania Electric Prod Conversion of calcium hydrogen phosphate dihydrate to the anhydrous form
US3420625A (en) * 1965-12-13 1969-01-07 Gen Electric Recrystallization of anhydrous calcium acid phosphate from the dihydrate form
US3940343A (en) * 1973-03-27 1976-02-24 Westinghouse Electric Corporation Method of preparing halophosphate phosphor of controlled particle size

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296494A (en) * 1939-09-14 1942-09-22 Blockson Chemical Co Manufacture of anhydrous di-calcium phosphate
US3429625A (en) * 1966-08-11 1969-02-25 Lucas Industries Ltd Hydrostatic bearings
US3635660A (en) * 1969-02-05 1972-01-18 Thorn Electrical Ind Ltd Phosphate and phosphors prepared therefrom
US3927180A (en) * 1972-12-08 1975-12-16 Gte Sylvania Inc Method of converting brushite to monetite crystals with controlled variation in crystal habit
FR2299269A1 (fr) * 1975-01-29 1976-08-27 Central Glass Co Ltd Procede pour la preparation de phosphate secondaire de calcium anhydre
US4044105A (en) * 1975-01-29 1977-08-23 Central Glass Company, Limited Process for preparation of calcium hydrogen phosphate anhydride

Also Published As

Publication number Publication date
US4203955A (en) 1980-05-20
GB2002337B (en) 1982-02-24
DE2834532C3 (de) 1980-08-28
GB2002337A (en) 1979-02-21
DE2834532A1 (de) 1979-02-15
FR2399974B1 (fr) 1981-10-16
DE2834532B2 (de) 1980-01-03

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