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公开(公告)号：US06730279B2
公开(公告)日：2004-05-04
申请号：US09852207
申请日：2001-05-09
申请人： Robert W. Balliett , Wolfgang Kummer , John E. Litz , Lawrence F. McHugh , Harry H. K. Nauta , Paul B. Queneau , Rong-Chien Wu
发明人： Robert W. Balliett , Wolfgang Kummer , John E. Litz , Lawrence F. McHugh , Harry H. K. Nauta , Paul B. Queneau , Rong-Chien Wu
IPC分类号： C01G3900
CPC分类号： C01G39/003 , C01G39/02
摘要： High purity ammonium dimolybdate or molybdenum oxide is produced by the pressure oxidation of low grade molybdenite concentrates or molybdenum intermediates. The process entails nearly complete oxidation of the sulfide minerals while optimizing the process chemistry and autoclave conditions to solubilize as little of the molybdenum values as possible. The autoclave discharge 12 is then subjected to a leaching step, either an alkaline leach 50, 400 or ammonium leach 250 process, before or after a liquid/solid separation step 20, 220, 410. The solution is then subjected to (a) filtration 60, 410, solvent extraction 70, 440, crystallization 90,450, and calcination 120, 480 or (b) filtration 260, 280, crystallization 290, and calcination 320 to produce a product suitable for chemical-grade molybdenum oxide 125, 325, 485.
摘要翻译： 通过低品位辉钼矿浓缩物或钼中间体的压力氧化产生高纯度的二钼酸铵或氧化钼。 该过程需要几乎完全硫化矿物氧化，同时优化工艺化学和高压釜条件以溶解尽可能少的钼值。 然后在液体/固体分离步骤20,220,410之前或之后对高压釜排出口12进行浸出步骤，碱浸液50,400或铵浸出250处理。然后将溶液进行（a）过滤 60,410，溶剂萃取70,440，结晶90,450和煅烧120,480或（b）过滤260,280，结晶290和煅烧320以产生适合于化学级氧化钼125,325,485的产物。
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公开(公告)号：US4758406A
公开(公告)日：1988-07-19
申请号：US125504
申请日：1987-11-25
CPC分类号： C22C33/006
摘要： Molybdenite is roasted under controlled conditions to provide a polymolybdenum oxide composition having an oxygen content in excess of the stoichiometric oxygen content for MoO.sub.2 and less than that for MoO.sub.3, such that the composition contains MoO.sub.3 equivalent in excess of 5% and ranging up to 15% by weight, preferably, from about 10% to 15% by weight. The polymolybdenum oxide composition can be used to introduce molybdenum into baths of molten steel and the like with high recovery of the molybdenum content in the bath and with quiet addition characteristics as compared to the use of MoO.sub.3 per se. Preferably, a Herreshoff type roaster is used and the production rate of the furnace producing the new product is substantially increased, with an exit gas richer in SO.sub.2, as compared to use of the same roaster in roasting molybdenite to form MoO.sub.3 per se.
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公开(公告)号：US4207296A
公开(公告)日：1980-06-10
申请号：US942835
申请日：1978-09-15
申请人： Harry H. K. Nauta , Jan W. Kok , Jan Harte
发明人： Harry H. K. Nauta , Jan W. Kok , Jan Harte
CPC分类号： C01G39/02 , C01G39/00 , C01P2006/80
摘要： Molybdenum trioxide containing potassium is heated to a temperature sufficiently high (i.e. at least about 525.degree. C.) to render the potassium soluble in hot water, the heated trioxide is quenched to less than about 400.degree. C. at a rate of at least about 30.degree. C. per minute, the quenched trioxide is leached with hot water (between about 50.degree. C. and about 100.degree. C.) to leach the solubilized potassium and after liquid-solids separation the molybdenum trioxide is dissolved in ammonium hydroxide to form ammonium molybdates, which can be recovered from solution and then can be calcined to chemical grade molybdic oxide. The process is advantageously conducted in conjunction with the roasting of molybdenite.
摘要翻译： 将含有三氧化钼的钾加热到足够高的温度（即至少约525℃）以使钾溶于热水中，将加热的三氧化二砷以至少约 每分钟30℃，用热水（约50℃至约100℃）浸泡淬灭的三氧化硫以浸出溶解的钾，并且在液固固体分离后，将三氧化钼溶解在氢氧化铵中形成 钼酸铵，可从溶液中回收，然后煅烧成化学级的氧化钼。 该方法有利地与辉钼矿的焙烧结合进行。
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