TNSN92119A1 - PROCESS FOR THE MANUFACTURE OF VERY LOW CADMIUM PHOSPHORIC ACID - Google Patents

PROCESS FOR THE MANUFACTURE OF VERY LOW CADMIUM PHOSPHORIC ACID

Info

Publication number
TNSN92119A1
TNSN92119A1 TNTNSN92119A TNSN92119A TNSN92119A1 TN SN92119 A1 TNSN92119 A1 TN SN92119A1 TN TNSN92119 A TNTNSN92119 A TN TNSN92119A TN SN92119 A TNSN92119 A TN SN92119A TN SN92119 A1 TNSN92119 A1 TN SN92119A1
Authority
TN
Tunisia
Prior art keywords
phosphoric acid
manufacture
low cadmium
cadmium
low
Prior art date
Application number
TNTNSN92119A
Other languages
French (fr)
Inventor
Mustapha Ghayor
Mohamed Smani
Original Assignee
Ct D Etudes Et De Rech S Des Phosphates Mineraux Cerphos
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 Ct D Etudes Et De Rech S Des Phosphates Mineraux Cerphos filed Critical Ct D Etudes Et De Rech S Des Phosphates Mineraux Cerphos
Publication of TNSN92119A1 publication Critical patent/TNSN92119A1/en

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)
  • Battery Electrode And Active Subsutance (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

L'INVENTION CONCERNE UN PROCEDE DE FABRICATION D'ACIDE PHOSPHORIQUE PAR VOIE HUMIDE, QUI CONSISTE A REUDIRE LE CADMIUM DANS L'ACIDE PHOSPHORIQUE PAR SA COPRECIPITATION DANS L'ANHYRITE FORME, DANS UN REACTEUR-EVAPORATEUR REGI PAR DES CONDITIONS THERMODYNAMIQUES ET CINETIQUES APPROPRIEES. L'ACIDE MARCHAND OBTENU APRES DECANTATION PRESENTE UNE TENEUR FAIBLE EN CADMIUM.THE INVENTION RELATES TO A WET PROCESS FOR THE MANUFACTURE OF PHOSPHORIC ACID, WHICH CONSISTS OF REUDITING CADMIUM IN PHOSPHORIC ACID BY ITS CO-CONCEPTANCE IN FORMED ANHYRITE, IN A REACTOR-EVAPORATOR CONTROLLED BY APPROPRIATE THERMODYNAMIC AND KINETIC CONDITIONS. THE COMMERCIAL ACID OBTAINED AFTER DECANTATION HAS A LOW CADMIUM CONTENT.

TNTNSN92119A 1992-02-07 1992-12-28 PROCESS FOR THE MANUFACTURE OF VERY LOW CADMIUM PHOSPHORIC ACID TNSN92119A1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
TNSN92119A1 true TNSN92119A1 (en) 1993-06-08

Family

ID=32322468

Family Applications (1)

Application Number Title Priority Date Filing Date
TNTNSN92119A TNSN92119A1 (en) 1992-02-07 1992-12-28 PROCESS FOR THE MANUFACTURE OF VERY LOW CADMIUM PHOSPHORIC ACID

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
WO2008113403A1 (en) * 2007-03-06 2008-09-25 Centre D'etudes Et De Recherches Des Phosphates Mineraux Method for processing cadmiferous solids
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
FR2687657B1 (en) 1996-03-08
JO1739B1 (en) 1993-06-15
ES2065837B1 (en) 1995-10-01
FR2687657A1 (en) 1993-08-27
ES2065837A1 (en) 1995-02-16
DZ1656A1 (en) 2002-02-17
OA09773A (en) 1993-11-30

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