TNSN92119A1 - PROCESS FOR THE MANUFACTURE OF VERY LOW CADMIUM PHOSPHORIC ACID - Google Patents
PROCESS FOR THE MANUFACTURE OF VERY LOW CADMIUM PHOSPHORIC ACIDInfo
- 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
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
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.
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)
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 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)
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 |
-
1992
- 1992-12-28 TN TNTNSN92119A patent/TNSN92119A1/en unknown
- 1992-12-29 DZ DZ920170A patent/DZ1656A1/en active
-
1993
- 1993-02-03 FR FR9301150A patent/FR2687657B1/en not_active Expired - Fee Related
- 1993-02-04 ES ES09300202A patent/ES2065837B1/en not_active Expired - Fee Related
- 1993-02-05 OA OA60336A patent/OA09773A/en unknown
- 1993-02-06 JO JO19931739A patent/JO1739B1/en active
Also Published As
Publication number | Publication date |
---|---|
OA09773A (en) | 1993-11-30 |
FR2687657B1 (en) | 1996-03-08 |
ES2065837B1 (en) | 1995-10-01 |
FR2687657A1 (en) | 1993-08-27 |
JO1739B1 (en) | 1993-06-15 |
DZ1656A1 (en) | 2002-02-17 |
ES2065837A1 (en) | 1995-02-16 |
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