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1.发明授权
公开(公告)号：US4788044A
公开(公告)日：1988-11-29
申请号：US072484
申请日：1987-07-13
CPC分类号： C22B3/0024 , C01B17/901 , C01G31/00 , C09C1/48 , C22B34/22 , C01P2006/80 , Y02P10/234
摘要： A method is described for recovering vanadium from residues from the combustion of petroleum fractions, wherein the residues, such as ash and soot, are leached with aqueous H.sub.2 SO.sub.4 to extract vanadium and any additional polyvalent cations contained therein. The acid leaching solution, after oxidation of the extracted cations, is treated with a complexing agent, in particular EDTA or salts thereof, and then with ammonia to selectively precipitate vanadium as highly pure ammonium polyvanadate.
摘要翻译： 描述了一种用于从石油馏分的燃烧的残余物中回收钒的方法，其中残余物例如灰分和烟灰用H 2 SO 4水溶液浸提以提取钒及其中所含的任何附加的多价阳离子。 在提取的阳离子氧化之后，酸性浸出溶液用络合剂，特别是EDTA或其盐处理，然后用氨选择性沉淀钒作为高纯度的聚钒酸铵。
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2.发明授权
公开(公告)号：US4814150A
公开(公告)日：1989-03-21
申请号：US72482
申请日：1987-07-13
CPC分类号： C22B34/22 , Y02P10/234
摘要： A process for the high-yield recovery of vanadium from petroleum combustion residues, wherein these residues are: (a) subjected to attach with sodium hydroxide in the presence of an oxidizer, or (b) impregnated with sodium hydroxide, dried at 100.degree.-250.degree. C. and leached with water, to selectively extract vanadium with high yields. The vanadium is precipitated from the alkaline extract by adding H.sub.2 SO.sub.4 up to pH.apprxeq.2 and an ammonium salt. The precipitated ammonium polyvanadate is calcinated to vanadium pentoxide.
摘要翻译： 一种从石油燃烧残渣中高产率回收钒的方法，其中这些残留物是：（a）在氧化剂存在下用氢氧化钠附着，或（b）用氢氧化钠浸渍，在100℃下干燥， 250℃，用水浸出，以高产率选择性提取钒。 通过加入H 2 SO 4直至pH APPROX 2和铵盐，从碱性提取物中沉淀出钒。 将沉淀的聚钒酸铵煅烧成五氧化二钒。
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