METHOD FOR PREPARING A SULFURIC ACID SOLUTION FROM PHOSPHOGYPSE

FR3172090A1Pending Publication Date: 2026-08-14UNIV MOHAMMED VI POLYTECHNIQUE
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Patent Information

Application Number
FR2025001416
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-02-11
Publication Date
2026-08-14

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Abstract

The present invention relates to a process for preparing a sulfuric acid solution from phosphogypsum. The process begins with a basic leaching of the phosphogypsum, producing a liquid filtrate rich in sulfate ions. The process then uses a bipolar membrane electrodialysis (BMED) device, which comprises several compartments (anodic, cathodic, acidic, feed, and basic) separated by specific membranes. The sulfate-rich solution is introduced into the feed compartment of the BMED. By applying an electric current, sulfuric acid and a corresponding base are formed in the acidic and basic compartments, respectively. Figure 1
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