TN2019000043A1 - PROCESS FOR THE REDUCTION OF HEAVY METALS IN CONCENTRATED PHOSPHORIC ACID - Google Patents

PROCESS FOR THE REDUCTION OF HEAVY METALS IN CONCENTRATED PHOSPHORIC ACID

Info

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
Application number
TNP/2019/000043A
Other languages
French (fr)
Inventor
Khaled Ammar
Abdallah Hedi Ben
Houcine DERBALI
Anwar Derbel
Lazhar Koubaa
Original Assignee
Groupe Chimique Tunisien Direction Centrale De La Recherche Scient
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 Groupe Chimique Tunisien Direction Centrale De La Recherche Scient filed Critical Groupe Chimique Tunisien Direction Centrale De La Recherche Scient
Priority to TNP/2019/000043A priority Critical patent/TN2019000043A1/en
Publication of TN2019000043A1 publication Critical patent/TN2019000043A1/en

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  • 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.

TNP/2019/000043A 2019-02-12 2019-02-12 PROCESS FOR THE REDUCTION OF HEAVY METALS IN CONCENTRATED PHOSPHORIC ACID TN2019000043A1 (en)

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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