TN2016000430A1 - Process for the transformation of phosphogypsum into calcium silicate and alkali metal sulphate - Google Patents

Process for the transformation of phosphogypsum into calcium silicate and alkali metal sulphate

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Publication number
TN2016000430A1
TN2016000430A1 TN2016000430A TN2016000430A TN2016000430A1 TN 2016000430 A1 TN2016000430 A1 TN 2016000430A1 TN 2016000430 A TN2016000430 A TN 2016000430A TN 2016000430 A TN2016000430 A TN 2016000430A TN 2016000430 A1 TN2016000430 A1 TN 2016000430A1
Authority
TN
Tunisia
Prior art keywords
alkali metal
phosphogypsum
calcium silicate
transformation
metal sulphate
Prior art date
Application number
TN2016000430A
Other languages
French (fr)
Inventor
Hichem Hamzaoui Ahmed
Mounir Hajji
Adel Mnif
Safa Zemni
Original Assignee
Centre National Des Rech En Sciences Des Materiaux Cnrsm
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 Centre National Des Rech En Sciences Des Materiaux Cnrsm filed Critical Centre National Des Rech En Sciences Des Materiaux Cnrsm
Priority to TN2016000430A priority Critical patent/TN2016000430A1/en
Publication of TN2016000430A1 publication Critical patent/TN2016000430A1/en

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Abstract

La présente invention consiste à traiter le phosphogypse par une solution de silicate de métal alcalin pour le transformer en silicate de calcium (le gâteau, à l'état solide) et en sulfate de métal alcalin (le filtrat, solution aqueuse). Le sulfate de métal alcalin sous forme solide est obtenu après évaporation de la solution « filtrat ». Le métal alcalin peut être du sodium ou du potassium.The present invention comprises treating the phosphogypsum with an alkali metal silicate solution to convert it into calcium silicate (the cake, in the solid state) and alkali metal sulfate (the filtrate, aqueous solution). The alkali metal sulphate in solid form is obtained after evaporation of the "filtrate" solution. The alkali metal may be sodium or potassium.

TN2016000430A 2016-10-07 2016-10-07 Process for the transformation of phosphogypsum into calcium silicate and alkali metal sulphate TN2016000430A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TN2016000430A TN2016000430A1 (en) 2016-10-07 2016-10-07 Process for the transformation of phosphogypsum into calcium silicate and alkali metal sulphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TN2016000430A TN2016000430A1 (en) 2016-10-07 2016-10-07 Process for the transformation of phosphogypsum into calcium silicate and alkali metal sulphate

Publications (1)

Publication Number Publication Date
TN2016000430A1 true TN2016000430A1 (en) 2018-04-04

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ID=62814729

Family Applications (1)

Application Number Title Priority Date Filing Date
TN2016000430A TN2016000430A1 (en) 2016-10-07 2016-10-07 Process for the transformation of phosphogypsum into calcium silicate and alkali metal sulphate

Country Status (1)

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TN (1) TN2016000430A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115814750A (en) * 2022-12-15 2023-03-21 贵州大学 Method for preparing porous calcium silicate adsorbent from phosphogypsum

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115814750A (en) * 2022-12-15 2023-03-21 贵州大学 Method for preparing porous calcium silicate adsorbent from phosphogypsum

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