TN2019000043A1 - PROCESS FOR THE REDUCTION OF HEAVY METALS IN CONCENTRATED PHOSPHORIC ACID - Google Patents
PROCESS FOR THE REDUCTION OF HEAVY METALS IN CONCENTRATED PHOSPHORIC ACIDInfo
- Publication number
- TN2019000043A1 TN2019000043A1 TNP/2019/000043A TN2019000043A TN2019000043A1 TN 2019000043 A1 TN2019000043 A1 TN 2019000043A1 TN 2019000043 A TN2019000043 A TN 2019000043A TN 2019000043 A1 TN2019000043 A1 TN 2019000043A1
- Authority
- TN
- Tunisia
- Prior art keywords
- reduction
- phosphoric acid
- heavy metals
- concentrated phosphoric
- organic matter
- Prior art date
Links
Landscapes
- Removal Of Specific Substances (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
La présente invention a pour objet un procédé simple, exploité à l'échelle industrielle, basé sur la réduction des teneurs en fluorures et en matières organiques ainsi que la teneur en métaux lourds et particulièrement le cadmium dans l'acide phosphorique. Pour la réduction des fluorures et des matières organiques, on utilise des silicates et pour la réduction du cadmium un réactif chimique à base de sel alcalin. La réaction s'effectue d'une façon instantanée et les complexes formés sont éliminés par un dispositif de séparation liquide-solide.The present invention relates to a simple process, used on an industrial scale, based on the reduction of the fluoride and organic matter contents as well as the heavy metal content and particularly cadmium in phosphoric acid. For the reduction of fluorides and organic matter, silicates are used and for the reduction of cadmium a chemical reagent based on an alkali salt. The reaction takes place instantaneously and the complexes formed are removed by a liquid-solid separation device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TNP/2019/000043A TN2019000043A1 (en) | 2019-02-12 | 2019-02-12 | PROCESS FOR THE REDUCTION OF HEAVY METALS IN CONCENTRATED PHOSPHORIC ACID |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TNP/2019/000043A TN2019000043A1 (en) | 2019-02-12 | 2019-02-12 | PROCESS FOR THE REDUCTION OF HEAVY METALS IN CONCENTRATED PHOSPHORIC ACID |
Publications (1)
Publication Number | Publication Date |
---|---|
TN2019000043A1 true TN2019000043A1 (en) | 2020-07-15 |
Family
ID=72421423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TNP/2019/000043A TN2019000043A1 (en) | 2019-02-12 | 2019-02-12 | PROCESS FOR THE REDUCTION OF HEAVY METALS IN CONCENTRATED PHOSPHORIC ACID |
Country Status (1)
Country | Link |
---|---|
TN (1) | TN2019000043A1 (en) |
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2019
- 2019-02-12 TN TNP/2019/000043A patent/TN2019000043A1/en unknown
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