| abstract |
PROCESS FOR DEPURING AN AQUEOUS SOLUTION CONTAINING ALKALINE CARBONATE, SULPHATE, HYDROXIDE OR HYDROGENOCARBONATE AS WELL AS, PRIMARILY, AT LEAST ONE OF THE METALS BELONGING TO THE GROUP CONSTITUTED BY VANADIUM, URANIUM AND MOLYBDENE SOILS AND MINERAL AND OR ORGANIC IMPURITIES, THE SAID SOLUTIONS COMING FROM A MINERAL ATTACK CYCLE AND TAKEN AFTER THE EXTRACTION OF THE METAL RESEARCH WHICH CONSISTS OF TREATING THE SAID SOLUTIONS WITH LIME AT A TEMPERATURE AT THE MOST EQUAL TO BOILING, TO TRANSFORMING THE CARBONATE AND HYDROGENOCARBONATE PRESENT INTO ALKALINE HYDROXIDE, THEN TO PERFORM THE SEPARATION AND WASHING OF A FIRST PRECIPITE OF CALCIUM CARBONATE, AND OF A LIQUOR WHICH HAS ENRICHED IN HYDROXIDE LERVORALIN TO PROCEED WITH THE CONCENTRATION CONCENTRATION CONCENTRATION '' OBTAINING A SECOND PRECIPITE ESSENTIALLY CONSTITING OF ALKALINE SULPHATE, TO SEPARATE IT FROM THE HYDROXIDE-RICH LIQUID PHASE, TO REDISSOVE IT IN AN AQUEOUS MEDIUM AND THROUGH ITER THE ALKALINE DESULPHATE SOLUTION SO OBTAINED BY BARIUM ALUMINATE THEN BY CARBON GAS, TO SEPARATE THE PRECIPITE OBTAINED WHICH IS THERMALLY TREATED TO REGENERATE THE BARIUM ALUMINATE WHICH IS RECYCLED. |