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ES2065837A1 - Process for manufacture of commercial-grade phosphoric acid containing a very low cadmium content - Google Patents

Process for manufacture of commercial-grade phosphoric acid containing a very low cadmium content

Info

Publication number
ES2065837A1
ES2065837A1 ES09300202A ES9300202A ES2065837A1 ES 2065837 A1 ES2065837 A1 ES 2065837A1 ES 09300202 A ES09300202 A ES 09300202A ES 9300202 A ES9300202 A ES 9300202A ES 2065837 A1 ES2065837 A1 ES 2065837A1
Authority
ES
Spain
Prior art keywords
phosphoric acid
commercial
manufacture
cadmium content
acid containing
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
ES09300202A
Other languages
Spanish (es)
Other versions
ES2065837B1 (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)
  • Battery Electrode And Active Subsutance (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The invention relates to a process for the manufacture of phosphoric acid via wet route, which consists in reducing the cadmium in the phosphoric acid by its coprecipitation in the anhydrite formed in a reactor/evaporator governed by appropriate thermodynamic and kinetic conditions. The commercial-grade acid obtained after separation by settling has a low cadmium content.
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 true ES2065837A1 (en) 1995-02-16
ES2065837B1 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
PL2132347T3 (en) * 2007-03-06 2011-12-30 Centre Detudes Et De Rech Des Phosphates Mineraux Method for the treatment of cadmium-bearing 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002107A1 (en) * 1981-12-14 1983-06-23 United States Gypsum Co Phosphoanhydrite process
WO1991000244A1 (en) * 1989-07-04 1991-01-10 Office Togolais Des Phosphates Process for eliminating heavy metals from phosphoric acid

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002107A1 (en) * 1981-12-14 1983-06-23 United States Gypsum Co Phosphoanhydrite process
WO1991000244A1 (en) * 1989-07-04 1991-01-10 Office Togolais Des Phosphates Process for eliminating heavy metals from phosphoric acid

Also Published As

Publication number Publication date
JO1739B1 (en) 1993-06-15
ES2065837B1 (en) 1995-10-01
OA09773A (en) 1993-11-30
FR2687657A1 (en) 1993-08-27
DZ1656A1 (en) 2002-02-17
TNSN92119A1 (en) 1993-06-08
FR2687657B1 (en) 1996-03-08

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Legal Events

Date Code Title Description
FD2A Announcement of lapse in spain

Effective date: 20180806