ES2065837B1 - PRODUCTION PROCEDURE FOR COMMERCIAL PHOSPHORIC ACID WITH A VERY LOW CADMIUM CONTENT. - Google Patents

PRODUCTION PROCEDURE FOR COMMERCIAL PHOSPHORIC ACID WITH A VERY LOW CADMIUM CONTENT.

Info

Publication number
ES2065837B1
ES2065837B1 ES09300202A ES9300202A ES2065837B1 ES 2065837 B1 ES2065837 B1 ES 2065837B1 ES 09300202 A ES09300202 A ES 09300202A ES 9300202 A ES9300202 A ES 9300202A ES 2065837 B1 ES2065837 B1 ES 2065837B1
Authority
ES
Spain
Prior art keywords
phosphoric acid
production procedure
cadmium content
content
low cadmium
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 - Fee Related
Application number
ES09300202A
Other languages
Spanish (es)
Other versions
ES2065837A1 (en
Inventor
Mustapha Ghayor
Mohamed Smani
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.)
CERPHOS PHOSPHATES MINEREAUX
Original Assignee
CERPHOS PHOSPHATES MINEREAUX
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 CERPHOS PHOSPHATES MINEREAUX filed Critical CERPHOS PHOSPHATES MINEREAUX
Publication of ES2065837A1 publication Critical patent/ES2065837A1/en
Application granted granted Critical
Publication of ES2065837B1 publication Critical patent/ES2065837B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • C01B25/18—Phosphoric acid
    • C01B25/234—Purification; Stabilisation; Concentration
    • C01B25/2343—Concentration concomitant with purification, e.g. elimination of fluorine

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Luminescent Compositions (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

EL INVENTO SE REFIERE A UN PROCEDIMIENTO DE PREPARACION DE ACIDO FOSFORICO POR VIA HUMEDA CON UN CONTENIDO MUY BAJO EN CADMIO, QUE CONSISTE EN REAJUSTAR LA CONCENTRACION EN SOLIDO Y ACIDO SULFURICO DEL ACIDO FOSFORICO A LA SALIDA DE LA FILTRACION. EL ACIDO FOSFORICO DECANTADO O, DE PREFERENCIA, SIN DECANTAR, CON REAJUSTE DEL SULFATO DE CALCIO HIDRATADO, PRESENTA UN CONTENIDO EN SOLIDOS DE ENTRE EL 1,3% Y 6% Y SE REAJUSTA DE FORMA PARALELA CON EL ACIDO SULFURICO PARA OBTENER UN EXCESO DE SULFURICO COMPRENDIDO ENTRE EL 1,5% Y 6%. EL ACIDO FOSFORICO, ASI REAJUSTADO, SE CONDUCE HACIA UN REACTOR-EVAPORADOR QUE PERMITE LA OBTENCION DE LA ANHIDRITA, LA CUAL ARRASTRA EL CADMIO, A UNA TEMPERATURA COMPRENDIDA ENTRE LOS 84G Y LOS 92GC, BAJO UNA PRESION ABSOLUTA DE 50 A 60 MMHG.THE INVENTION REFERS TO A PROCEDURE FOR THE PREPARATION OF PHOSPHORIC ACID BY WET WAY WITH A CONTENT VERY LOW IN CADMIUM, WHICH CONSISTS OF RE-ADJUSTING THE CONCENTRATION IN SOLID AND SULFURIC ACID AT THE OUTPUT OF THE FILTRATION. THE DECANTATED PHOSPHORIC ACID OR, PREFERENTIALLY, WITHOUT DECANTATION, WITH ADJUSTMENT OF THE HYDRATED CALCIUM SULPHATE, PRESENTS A CONTENT IN SOLIDS OF BETWEEN 1.3% AND 6% AND IS RE-ADJUSTED IN PARALLEL WITH THE SULFURIC ACID TO OBTAIN AN EXCESS SULFURIC INCLUDED BETWEEN 1.5% AND 6%. THE PHOSPHORIC ACID, SO READJUSTED, IS CONDUCTED TOWARDS A REACTOR-EVAPORATOR THAT ALLOWS THE OBTAINING OF THE ANHYDRITE, WHICH DRAGS THE CADMIUM, AT A TEMPERATURE COMPRISED BETWEEN 84G AND 92GC, UNDER AN ABSOLUTE PRESSURE OF 50 TO 60 MM.

ES09300202A 1992-02-07 1993-02-04 PRODUCTION PROCEDURE FOR COMMERCIAL PHOSPHORIC ACID WITH A VERY LOW CADMIUM CONTENT. Expired - Fee Related ES2065837B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
MA22703 1992-02-07

Publications (2)

Publication Number Publication Date
ES2065837A1 ES2065837A1 (en) 1995-02-16
ES2065837B1 true ES2065837B1 (en) 1995-10-01

Family

ID=32322468

Family Applications (1)

Application Number Title Priority Date Filing Date
ES09300202A Expired - Fee Related ES2065837B1 (en) 1992-02-07 1993-02-04 PRODUCTION PROCEDURE FOR COMMERCIAL PHOSPHORIC ACID WITH A VERY LOW CADMIUM CONTENT.

Country Status (6)

Country Link
DZ (1) DZ1656A1 (en)
ES (1) ES2065837B1 (en)
FR (1) FR2687657B1 (en)
JO (1) JO1739B1 (en)
OA (1) OA09773A (en)
TN (1) TNSN92119A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1317183C (en) * 2005-12-23 2007-05-23 中国石化集团南京设计院 Process for producing wet method phosphoric acid by medium low grade phosphorus mine
ATE511553T1 (en) * 2007-03-06 2011-06-15 Ct D Etudes Et De Rech S Des Phosphates Mineraux METHOD FOR PROCESSING SOLIDS CONTAINING CADMIUM
CN102826530A (en) * 2012-09-25 2012-12-19 灵山县骄丰化工有限公司 Method for co-producing calcium hydrogen phosphate and calcium superphosphate by using high calcium siliceous low-graded phosphate ore
FR3117476B1 (en) 2020-12-10 2023-04-21 Ocp Sa INTEGRATED PHOSPHORIC ACID DECADMIATION PROCESS

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4452770A (en) * 1981-12-14 1984-06-05 United States Gypsum Company Phosphoanhydrite process
NL8601846A (en) * 1986-07-15 1988-02-01 Stamicarbon METHOD FOR REMOVING HEAVY METALS FROM ACID PHOSPHATE-CONTAINING AQUEOUS MEDIA.
IL85751A (en) * 1988-03-16 1991-12-15 Negev Phosphates Ltd Method for the removal of heavy metal ions from phosphoric acid
FR2649391B1 (en) * 1989-07-04 1991-10-31 Pierre Becker PROCESS FOR TREATING PHOSPHORIC ACID TO ELIMINATE SOME HEAVY METALS

Also Published As

Publication number Publication date
OA09773A (en) 1993-11-30
ES2065837A1 (en) 1995-02-16
FR2687657B1 (en) 1996-03-08
DZ1656A1 (en) 2002-02-17
FR2687657A1 (en) 1993-08-27
TNSN92119A1 (en) 1993-06-08
JO1739B1 (en) 1993-06-15

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Legal Events

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FD2A Announcement of lapse in spain

Effective date: 20180806