Extraction process for reactive metal oxides
    14.
    发明申请
    Extraction process for reactive metal oxides 有权
    活性金属氧化物的提取工艺

    公开(公告)号:US20090311154A1

    公开(公告)日:2009-12-17

    申请号:US10560515

    申请日:2004-06-11

    Abstract: The present invention relates to a zero-waste process for extraction of alumina from different types of bauxite ores and red mud residues and of titanium dioxide from ilmenite. Iron oxide is first reduced to metallic iron above the melting point of C-saturated cast iron alloy which yields a high-C iron alloy and an Al and Ti metal oxide rich slag which is then treated with alkali carbonate to form alkali aluminates and titanates. The alkali aluminates are separated by water leaching from which the hydroxide of alumina is precipitated by bubbling CO2. The residue from water leaching is treated with sulphuric acid and TiO2 is precipitated via a hydrolysis route. The process recovers most of the metal values and generates only small quantities of silicious residues at pH4-5 which can be used for soil conditioning. The present also relates to a method for selective separation of TiO2-rich oxides from titaniferrous ore/residue materials via oxidative roasting in the presence of alkali carbonate or carbonates followed by aqueous leaching of the roasted material and selective precipitation of TiO2 under controlled condition below pH=4.

    Abstract translation: 本发明涉及从不同类型的铝土矿和赤泥渣以及来自钛铁矿的二氧化钛提取氧化铝的零废弃方法。 首先将氧化铁还原成高于C饱和铸铁合金的熔点的金属铁,其产生高C铁合金和富含Al和Ti的富金属氧化物的炉渣,然后用碱金属碳酸盐处理以形成碱金属铝酸盐和钛酸盐。 碱金属铝酸盐通过水浸出分离,氧化铝的氢氧化物通过鼓泡二氧化碳沉淀。 来自水浸的残渣用硫酸处理,并通过水解途径沉淀出TiO 2。 该过程回收大部分金属值,并在pH4-5下仅产生少量可用于土壤调理的硅残余物。 本发明还涉及一种通过在碱金属碳酸盐或碳酸盐存在下通过氧化焙烧从钛铁矿/残渣物质中选择性分离富含二氧化钛的氧化物的方法,接着浸出焙烧物料并在低于pH的控制条件下选择性沉淀TiO 2 = 4。

    Titaniferous ore beneficiation
    16.
    发明授权
    Titaniferous ore beneficiation 有权
    钛矿选矿

    公开(公告)号:US07494631B2

    公开(公告)日:2009-02-24

    申请号:US11728446

    申请日:2007-03-26

    Abstract: This invention relates to a process for beneficiating a titaniferous ore. The process comprises calcining the titaniferous ore, at least one alkali or alkaline earth metal salt, and at least one alumina-containing material in the presence of oxygen to form a calcined ore mixture, then leaching the calcined ore mixture with a solution comprising ammonium, sodium or magnesium chloride in the presence of oxygen to form a leached ore mixture, and contacting the leached ore with an acid to form a beneficiated ore.

    Abstract translation: 本发明涉及一种有利于含钛矿石的方法。 该方法包括在氧气存在下煅烧含钛矿石,至少一种碱金属或碱土金属盐和至少一种含氧化铝的材料,以形成煅烧矿石混合物,然后将煅烧矿石混合物用包含铵, 氯化钠或氯化镁,以形成浸出的矿石混合物,并使浸出的矿石与酸接触以形成精矿。

    Titaniferous ore beneficiation
    17.
    发明申请
    Titaniferous ore beneficiation 有权
    钛矿选矿

    公开(公告)号:US20080241026A1

    公开(公告)日:2008-10-02

    申请号:US11728446

    申请日:2007-03-26

    Abstract: This invention relates to a process for beneficiating a titaniferous ore. The process comprises calcining the titaniferous ore, at least one alkali or alkaline earth metal salt, and at least one alumina-containing material in the presence of oxygen to form a calcined ore mixture, then leaching the calcined ore mixture with a solution comprising ammonium, sodium or magnesium chloride in the presence of oxygen to form a leached ore mixture, and contacting the leached ore with an acid to form a beneficiated ore.

    Abstract translation: 本发明涉及一种有利于含钛矿石的方法。 该方法包括在氧气存在下煅烧含钛矿石,至少一种碱金属或碱土金属盐和至少一种含氧化铝的材料,以形成煅烧矿石混合物,然后将煅烧矿石混合物用包含铵, 氯化钠或氯化镁,以形成浸出的矿石混合物,并使浸出的矿石与酸接触以形成精矿。

    Halide glass compositions
    18.
    发明授权
    Halide glass compositions 失效
    卤化物玻璃组合物

    公开(公告)号:US5867515A

    公开(公告)日:1999-02-02

    申请号:US507374

    申请日:1995-10-05

    CPC classification number: C03C4/0071 C03C3/325 Y10S501/904

    Abstract: This invention relates to halide glasses which have particular utility as hosts for rare earth elements in order to provide optical amplification by laser activity. The glasses are characterized in that the metal content is similar to conventional ZBLAN glasses except that it has been discovered that the replacement of Al by Y and In and the use of more than one alkali metal fluoride, e.g., NaF, CsF and LiF, has synergistic benefits. The synergistic benefits are good lasing performance (due to the low content of aluminum) and good stability in spite of the low content of aluminum. Pr.sup.3+ constitutes a good lasing species for amplifying telecommunications signals at 1300 nm using pump radiation at 1020 nm.

    Abstract translation: PCT No.PCT / GB94 / 00346 Sec。 371日期1995年10月5日第 102(e)日期1995年10月5日PCT 1994年2月22日PCT PCT。 公开号WO94 / 19242 日期1994年9月1日本发明涉及具有特殊用途的卤化物玻璃,用作稀土元素的主体,以通过激光活性提供光学放大。 该玻璃的特征在于金属含量与常规的ZBLAN眼镜类似,只是已经发现用Y和In替代Al以及使用多于一种的碱金属氟化物,例如NaF,CsF和LiF,具有 协同效益。 协同效应是良好的激光性能(由于铝的含量低)和良好的稳定性,尽管铝含量低。 Pr3 +构成了一种良好的激光物种,用于在1020 nm处使用泵浦辐射,在1300 nm处放大电信信号。

    METHOD OF DETERMINING THE EXTENT OF A METAL OXIDE REDUCTION
    20.
    发明申请
    METHOD OF DETERMINING THE EXTENT OF A METAL OXIDE REDUCTION 审中-公开
    确定金属氧化物还原的范围的方法

    公开(公告)号:US20110100831A1

    公开(公告)日:2011-05-05

    申请号:US13001563

    申请日:2009-06-26

    Applicant: Animesh Jha

    Inventor: Animesh Jha

    CPC classification number: C25C3/00 C25C3/26 C25C3/32 C25C3/34

    Abstract: The present invention relates to a method for determining the extent of electrochemical extraction of a metal (M) from a metal (M) oxide caused by a voltage applied between a cathode comprising (or consisting essentially of) or in contact with the metal (M) oxide and an inert metal alloy anodein an oxygen-dissolving molten electrolyte.

    Abstract translation: 本发明涉及一种用于确定由金属(M)氧化物引起的金属(M)的电化学提取的程度的方法,其由施加在包含(或基本上由)组成的阴极或与金属(M )氧化物和惰性金属合金阳极氧化溶解熔融电解质。

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