Centre National Des Rech En Sciences Des Materiaux Cnrsm
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Solid-Sorbent Or Filter-Aiding Compositions
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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.
TN2016000430A2016-10-072016-10-07
Process for the transformation of phosphogypsum into calcium silicate and alkali metal sulphate
TN2016000430A1
(en)
METHOD FOR CLEANING TECHNICAL phosphoric acid (e.g., acids MGA) adding ash from the incinerator, comprising obtaining PURE PHOSPHORIC ACID, calcium sulfate, calcium hydrogenphosphate WATER-SOLUBLE AND SOLUTION OF METAL SALTS
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