PROCESS FOR EXTRACTING ALUMINUM FROM ALUMINOUS ORES
    3.
    发明申请
    PROCESS FOR EXTRACTING ALUMINUM FROM ALUMINOUS ORES 审中-公开
    从铝合金提取铝的工艺

    公开(公告)号:WO2012065253A1

    公开(公告)日:2012-05-24

    申请号:PCT/CA2011/001271

    申请日:2011-11-18

    Abstract: There is provided a method for extracting aluminum ions from aluminous ores, such as argillite. The process comprises leaching the argillite with an acid such as HCI so as to obtain a composition comprising the aluminum ions and iron ions; at least partially removing the iron ions from the composition by substantially selectively precipitating the iron at a pH of about 3 to about 6 by adding a base and at least partially removing the precipitated iron ions so as to obtain an Al-rich composition; and optionally purifying the Al-rich composition by adding a base for substantially selectively selectively precipitating the aluminum ions, by means of a hollow fiber membrane, or by a liquid-liquid extraction.

    Abstract translation: 提供了一种从铝土矿中提取铝离子的方法,如泥土。 该方法包括用酸例如HCl浸出泥质,以获得包含铝离子和铁离子的组合物; 通过加入碱并至少部分地除去沉淀的铁离子以便获得富含Al的组合物,通过基本上选择性地沉淀约3至约6的pH沉淀铁,从组合物中至少部分除去铁离子; 并且通过添加用于基本上选择性地选择性沉淀铝离子的碱,借助于中空纤维膜或通过液 - 液萃取,任选地纯化富Al组合物。

    METHODS FOR SEPARATING IRON IONS FROM ALUMINUM IONS
    6.
    发明申请
    METHODS FOR SEPARATING IRON IONS FROM ALUMINUM IONS 审中-公开
    从铝离子分离铁离子的方法

    公开(公告)号:WO2013010263A1

    公开(公告)日:2013-01-24

    申请号:PCT/CA2012/000687

    申请日:2012-07-18

    CPC classification number: C01G49/02 C22B3/44 C22B21/0015 Y02P10/234

    Abstract: There are provided methods for separating iron ions from aluminum ions contained in an acidic composition. The methods comprise reacting the acidic composition with a basic aqueous composition having a pH of at least 10.5 so as to obtain a precipitation composition, maintaining the precipitation composition at a pH above 10.5 so as to cause precipitation of the iron ions, at least substantially preventing precipitation of the aluminum ions, and to obtain a mixture comprising a liquid portion and a solid portion; and separating the liquid portion from the solid portion. There are also provided methods for treating an acidic composition comprising iron ions and aluminum ions. Such methods can be useful for preparing products such as alumina, aluminum, hematite etc.

    Abstract translation: 提供了分离铁离子与酸性组合物中所含的铝离子的方法。 所述方法包括使酸性组合物与pH至少为10.5的碱性水性组合物反应以获得沉淀组合物,将沉淀组合物保持在高于10.5的pH,以便使铁离子沉淀,至少基本上防止 沉淀铝离子,得到包含液体部分和固体部分的混合物; 并将液体部分与固体部分分离。 还提供了用于处理包含铁离子和铝离子的酸性组合物的方法。 这种方法可用于制备诸如氧化铝,铝,赤铁矿等产品。

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