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ES8101515A1 - PROCEDURE FOR THE MANUFACTURE OF CALCIUM PHOSPHATE BY HEAT TREATMENT. - Google Patents

PROCEDURE FOR THE MANUFACTURE OF CALCIUM PHOSPHATE BY HEAT TREATMENT.

Info

Publication number
ES8101515A1
ES8101515A1 ES487681A ES487681A ES8101515A1 ES 8101515 A1 ES8101515 A1 ES 8101515A1 ES 487681 A ES487681 A ES 487681A ES 487681 A ES487681 A ES 487681A ES 8101515 A1 ES8101515 A1 ES 8101515A1
Authority
ES
Spain
Prior art keywords
calcination
procedure
calcium phosphate
temperature
phosphoric acid
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.)
Expired
Application number
ES487681A
Other languages
Spanish (es)
Other versions
ES487681A0 (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.)
Produits Chimiques Ugine Kuhlmann
Pechiney SA
Original Assignee
Produits Chimiques Ugine Kuhlmann
Ugine Kuhlmann SA
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 Produits Chimiques Ugine Kuhlmann, Ugine Kuhlmann SA filed Critical Produits Chimiques Ugine Kuhlmann
Publication of ES487681A0 publication Critical patent/ES487681A0/en
Publication of ES8101515A1 publication Critical patent/ES8101515A1/en
Expired 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
    • C01B25/328—Defluorination during or after the preparation
    • 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
    • C01B25/45—Phosphates containing plural metal, or metal and ammonium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Fodder In General (AREA)
  • Processing Of Solid Wastes (AREA)
  • Fertilizers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Materials For Medical Uses (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

PROCEDIMIENTO DE OBTENCION DE FOSFATO DE CALCIO. CONSTA DE LAS SIGUIENTES ETAPAS: 1) ADICION AL MINERAL DE ACIDO FOSFORICO, UN ADITIVO SODADO Y LOS FINOS RECICLADOS. EL MINERAL DE PARTIDA TIENE APROXIMADAMENTE UN DIAMETRO MEDIO DE 150 MICRONS. EL ACIDO FOSFORICO EMPLEADO ES DE UN 25 A 35 POR 100 DE P2O5, EMPLEANDOSE EN FRIO O A 50-60GC. 2) ACONDICIONAMIENTO A UNA TEMPERATURA SUPERIOR A 100GC PARA LOS HUMOS DE CALCINACION EN FORMA DE GRANULOS COMPRENDIDOS ENTRE 0,5 Y 5 MM. 3) CALCINACION A UNA TEMPERATURA COMPRENDIDA ENTRE 1.180 Y 1.250GC; ESTA OPERACION VA PRECEDIDA POR UNA FASE DE PRECALENTAMIENTO A UNOS 700GC. LA CALCINACION SE EFECTUA EN LECHO FLUIDIZADO O EN HORNO GIRATORIO. 4) TEMPLE DEL PRODUCTO CALCINADO CON AIRE FRIO DE FORMA QUE EN MENOS DE 2 MINUTOS LA TEMPERATURA DESCIENDE A MENOS DE 800GC. COMO REACTIVO SODADO PUEDE EMPLEARSE CARBONATO DE SODIO O HIDROXIDO DE SODIO.PROCEDURE FOR OBTAINING CALCIUM PHOSPHATE. IT CONSISTS OF THE FOLLOWING STAGES: 1) ADDITION TO THE MINERAL OF PHOSPHORIC ACID, A SODATED ADDITIVE AND THE RECYCLED FINES. THE STARTING ORE HAS APPROXIMATELY AN AVERAGE DIAMETER OF 150 MICRONS. THE PHOSPHORIC ACID USED IS 25 TO 35 PER 100 P2O5, USED COLD OR AT 50-60GC. 2) CONDITIONING AT A TEMPERATURE HIGHER THAN 100GC FOR CALCINATION FUME IN THE FORM OF GRANULES BETWEEN 0.5 AND 5 MM. 3) CALCINATION AT A TEMPERATURE BETWEEN 1,180 AND 1,250GC; THIS OPERATION IS PRECEDED BY A PREHEATING PHASE AT ABOUT 700GC. CALCINATION IS CARRIED OUT IN A FLUIDIZED BED OR IN A ROTARY FURNACE. 4) TEMPERING THE CALCINED PRODUCT WITH COLD AIR SO THAT IN LESS THAN 2 MINUTES THE TEMPERATURE DECLINES TO LESS THAN 800GC. SODIUM CARBONATE OR SODIUM HYDROXIDE CAN BE USED AS A SODA REAGENT.

ES487681A 1979-01-15 1980-01-14 PROCEDURE FOR THE MANUFACTURE OF CALCIUM PHOSPHATE BY HEAT TREATMENT. Expired ES8101515A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7900844A FR2446254A1 (en) 1979-01-15 1979-01-15 DEFLUORED NATURAL CALCIUM PHOSPHATE FOR ANIMAL FEED

Publications (2)

Publication Number Publication Date
ES487681A0 ES487681A0 (en) 1980-12-16
ES8101515A1 true ES8101515A1 (en) 1980-12-16

Family

ID=9220732

Family Applications (1)

Application Number Title Priority Date Filing Date
ES487681A Expired ES8101515A1 (en) 1979-01-15 1980-01-14 PROCEDURE FOR THE MANUFACTURE OF CALCIUM PHOSPHATE BY HEAT TREATMENT.

Country Status (17)

Country Link
JP (1) JPS5595607A (en)
AR (1) AR222849A1 (en)
AU (1) AU534091B2 (en)
BE (1) BE881079A (en)
BR (1) BR8000215A (en)
DE (1) DE3000987A1 (en)
ES (1) ES8101515A1 (en)
FR (1) FR2446254A1 (en)
GB (1) GB2039867B (en)
IT (1) IT7969496A0 (en)
LU (1) LU82081A1 (en)
MA (1) MA18698A1 (en)
NL (1) NL8000220A (en)
OA (1) OA06434A (en)
RO (1) RO79927B (en)
SE (1) SE7910502L (en)
ZA (1) ZA80195B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4405575A (en) * 1982-04-23 1983-09-20 Henderson Albert E Method of defluorinating phosphates
US6123981A (en) * 1992-10-27 2000-09-26 Rhodia Inc. Conservation of orthophosphate waste for preparing an animal feed supplement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997367A (en) * 1956-10-22 1961-08-22 Int Minerals & Chem Corp Defluorination of phosphatic material
US2893834A (en) * 1957-02-18 1959-07-07 Int Minerals & Chem Corp Process for producing defluorinated calctum phosphates
US3058804A (en) * 1957-05-24 1962-10-16 Int Minerals & Chem Corp Process for production of defluorinated calcium phosphate
US3101999A (en) * 1961-01-13 1963-08-27 American Cyanamid Co Low temperature defluorination of phosphate material
US3292995A (en) * 1963-12-16 1966-12-20 Int Minerals & Chem Corp Defluorinated phosphate manufacture
FR2026878A1 (en) * 1968-12-23 1970-09-25 Kali Chemie Ag Producing ca3 (po4) 2 ca na po4

Also Published As

Publication number Publication date
ES487681A0 (en) 1980-12-16
BE881079A (en) 1980-07-10
AR222849A1 (en) 1981-06-30
ZA80195B (en) 1980-12-31
RO79927B (en) 1983-04-30
LU82081A1 (en) 1981-09-10
FR2446254A1 (en) 1980-08-08
JPS5595607A (en) 1980-07-21
BR8000215A (en) 1980-09-30
AU5458480A (en) 1980-07-24
NL8000220A (en) 1980-07-17
RO79927A (en) 1983-04-29
OA06434A (en) 1981-07-31
GB2039867B (en) 1983-01-06
SE7910502L (en) 1980-07-16
IT7969496A0 (en) 1979-12-28
AU534091B2 (en) 1984-01-05
FR2446254B1 (en) 1981-05-29
GB2039867A (en) 1980-08-20
MA18698A1 (en) 1980-10-01
DE3000987A1 (en) 1980-07-24

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