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1. 发明授权

US5290338A Antimony separation process 失效
标题翻译：锑分离工艺
公开(公告)号：US5290338A
公开(公告)日：1994-03-01
申请号：US962899
申请日：1992-10-16
申请人： Corby G. Anderson , Suzzann M. Nordwick , Leo E. Krys
发明人： Corby G. Anderson , Suzzann M. Nordwick , Leo E. Krys
IPC分类号： C01G30/00 , C22B30/02 , C01B27/00
CPC分类号： C01G30/00 , C01G30/002 , C01G30/005 , C01G30/008 , C22B30/02 , C01P2006/80 , C01P2006/82 , Y02P10/234
摘要： An antimony recovery process is disclosed in which antimony-containing material is leached in a solvent including elemental sulfur and a caustic to preferentially leach antimony. The antimony-containing leach liquor from the leaching step is separated from the insoluble residue by filtration, and the antimony compounds in the separated leach liquor are crystallized to separate the antimony compounds from impurities which are left in solution in the leach liquor. The crystals are then redissolved and treated to create marketable antimony products of high purity, such as antimony metal, sodium hydroxy antimonate, sodium antimonate, antimony pentoxide, and antimony pentasulfide. Alternatively, the crystallized antimony compounds comprising primarily sodium thioantimonate crystals may be recovered and sold without further treatment. Waste products may be treated with soluble iron compounds and lime to render the waste products safe for disposal. Additionally, feed material having a high weight ratio of soluble arsenic to soluble antimony may be pretreated, if desired, to improve the purity of the recovered antimony products and to remove the arsenic for further treatment or disposal.
摘要翻译：公开了一种锑回收方法，其中含锑材料在包括元素硫和苛性碱在内的溶剂中浸出以优先浸出锑。通过过滤将来自浸出步骤的含锑浸出液与不溶性残渣分离，并将分离的浸出液中的锑化合物结晶，将锑化合物与留在浸出液中的溶液中的杂质分离。然后将晶体再溶解并处理以制备高纯度的市售锑产品，例如锑金属，羟基锑酸钠，锑酸锑，五氧化二锑和五硫化锑。或者，主要包含硫代锑酸钠晶体的结晶锑化合物可以在不进一步处理的情况下回收和销售。废物可以用可溶性铁化合物和石灰处理，使废物安全处理。此外，如果需要，可以对可溶性砷与可溶性锑的重量比高的原料进行预处理，以提高回收的锑产物的纯度并除去砷进一步处理或处置。

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