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    • 4. 发明申请
    • PROCESS FOR THE SELECTIVE REMOVAL OF MOLYBDENUM FROM A SOLUTION CONTAINING IT
    • 从含有它的溶液中选择性去除莫来石的方法
    • US20140286839A1
    • 2014-09-25
    • US13885504
    • 2011-11-25
    • Andrea BartoliniEmilio Sentimenti
    • Andrea BartoliniEmilio Sentimenti
    • C22B34/34
    • C22B34/34C01G39/003C22B3/0031C22B3/20C22B7/007C22B7/009C22B34/225C22B34/345Y02P10/214Y02P10/23Y02P10/234Y10S210/912
    • The present invention relates to a process for selectively removing molybdenum from a solution which contains molybdenum, said process comprising the following steps: bringing the solution to an acid pH lower than or equal to 3, preferably lower than or equal to 2, even more preferably lower than or equal to 0.5, by the addition of an inorganic acid; adding at least one organic solvent, preferably toluene or xylene, to the solution and stirring continuously so as to create a water-organic emulsion; adding to the water-organic emulsion at least one alkaline metal xanthate having the general formula MeRX, wherein R is a linear or branched alkyl group having a number of carbon atoms higher than or equal to 2, Me is an alkaline metal selected from Li, Na, K, Rb, Cs and Fr, and X is the xanthate group, so as to form a complex with molybdenum wherein the molar ratio molybdenum/alkaline metal xanthate ranges from 1/6 to 1/2, keeping the emulsion at an acid pH by the addition of an inorganic acid, and interrupting the stirring so as to allow the separation of the aqueous phase from the organic phase. The linear or branched alkyl group R preferably has a number of carbon atoms higher than or equal to 2 and lower than or equal to 12. A reductant is optionally added to the starting solution which comprises Mo and V.
    • 本发明涉及从含有钼的溶液中选择性除去钼的方法,所述方法包括以下步骤:使溶液的pH低于或等于3,优选低于或等于2,甚至更优选 低于或等于0.5,通过加入无机酸; 向溶液中加入至少一种有机溶剂,优选甲苯或二甲苯,并连续搅拌,以产生水 - 有机乳液; 向所述水 - 有机乳液中加入至少一种具有通式MeRX的碱金属黄原酸盐,其中R是具有高于或等于2个碳原子数的直链或支链烷基,Me是选自Li, Na,K,Rb,Cs和Fr,X是黄原酸酯基,以便与钼形成络合物,其中钼/碱金属黄原酸酯的摩尔比为1/6至1/2,将乳液保持在酸 通过添加无机酸的pH,并且中断搅拌以使水相与有机相分离。 直链或支链烷基R优选具有高于或等于2且低于或等于12的碳原子数。还原剂任选地加入到包含Mo和V的起始溶液中。