METHOD FOR MATERIALS RECOVERY FROM CATALYSTS COMPRISING IRON, CERIUM, MOLYBDENUM, AND POTASSIUM
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Oct 31, 2012
filing date -
Oct 31, 2011
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Abandoned
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Abstract
A method for materials recovery from a catalyst comprising oxides of iron, cerium, molybdenum, and potassium, in which potassium and molybdenum are removed by treating the catalyst with an aqueous leachant, giving an aqueous solution S1 comprising potassium and molybdenum, and a solid residue R1 comprising cerium oxide and iron oxide, and recovering cerium in the form of a solid comprising a cerium(III) compound or cerium(IV) oxide from the solid residue R1.
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