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50 条记录 (耗时 0.022 秒)

    Process for recovering arsenic from acidic aqueous solution
    23.
    发明授权
    Process for recovering arsenic from acidic aqueous solution 失效
    从酸性水溶液中回收砷的方法

    公开(公告)号：US07232554B2

    公开(公告)日：2007-06-19

    申请号：US10381566

    申请日：2001-12-14

    申请人： Jose Mendoza Videla ,  Jorge Balanda Andina ,  Hector Gallegos Cisternas

    发明人： Jose Mendoza Videla ,  Jorge Balanda Andina ,  Hector Gallegos Cisternas

    IPC分类号： C01G28/00

    CPC分类号： C02F1/02 ,  B01D1/26 ,  C01G28/005 ,  C01P2004/61 ,  C01P2006/80 ,  C02F1/52 ,  C02F1/66 ,  C02F2101/103 ,  C02F2103/18 ,  Y10S210/912

    摘要： A process for the recovery of arsenic trioxide from acid solutions, particularly the aqueous acid effluent produced by a gas-washing process in the pyrometallurgy of copper sulfide ores is provided. Generally, the process comprises concentrating the acid solution in one or more evaporators in series; crystallizing arsenic contained in the concentrated solution as arsenic trioxide crystals; filtering the crystallized solution to obtain a solid phase comprising impure arsenic trioxide crystals; and purifying the solid phase to obtain a purified crystal product comprising arsenic trioxide. The process produces a commercially salable arsenic trioxide product without producing any solid or liquid residues subject to special handling or treatment regulations.

    摘要翻译： 提供了一种从酸性溶液中回收三氧化二砷的方法，特别是通过硫化铜矿石的火法冶金中的气体洗涤工艺产生的含水酸性流出物的方法。 通常，该方法包括将酸溶液串联在一个或多个蒸发器中; 将浓缩溶液中所含的砷结晶为三氧化二砷晶体; 过滤结晶的溶液以获得包含不纯的三氧化二砷晶体的固相; 并纯化固相，得到包含三氧化二砷的纯化晶体产物。 该方法产生商业上可销售的三氧化二砷产品，不产生任何固体或液体残留物，但须经受特殊处理或处理规定。

    Removal of boron and fluoride from water
    24.
    发明授权
    Removal of boron and fluoride from water 失效
    从水中去除硼和氟化物

    公开(公告)号：US6039789A

    公开(公告)日：2000-03-21

    申请号：US49331

    申请日：1998-03-27

    申请人： Jacques McMullen ,  Wilson Tsu ,  Reinhard Kargel

    发明人： Jacques McMullen ,  Wilson Tsu ,  Reinhard Kargel

    IPC分类号： C02F1/52 ,  C02F1/58 ,  C22B11/00 ,  C22B3/12

    CPC分类号： C22B11/00 ,  C02F1/5236 ,  C02F1/583 ,  Y10S210/911 ,  Y10S210/915

    摘要： A process for reducing boron and/or fluoride ion content of water. Feed water is contacted, in the presence of magnesium, with an alkaline hydroxide to produce treated water and a magnesium precipitate containing boron and fluorine. The precipitate is separated from the treated water. The boron content of water is reducible from above about 0.8 mg/L to below about 0.7 mg/L, and the fluoride ion content is reducible from above about 1 mg/L to below about 0.9 mg/L. The magnesium precipitate is optionally used to neutralize pressure oxidized ore slurry or roaster calcine in the context of gold recovery operations.

    摘要翻译： 一种降低水中硼和/或氟离子含量的方法。 给水在镁的存在下与碱性氢氧化物接触以产生处理过的水和含有硼和氟的镁沉淀物。 将沉淀物与处理过的水分离。 水的硼含量从约0.8mg / L至约0.7mg / L以下还原，氟离子含量可从约1mg / L以上降低至约0.9mg / L以下。 任选地使用镁沉淀物在金回收操作的情况下中和压力氧化矿浆或焙烧煅烧物。

    Method for carbon-catalysed thiosulfate leaching of gold-bearing materials
    25.
    发明授权
    Method for carbon-catalysed thiosulfate leaching of gold-bearing materials 有权

    公开(公告)号：US11639540B2

    公开(公告)日：2023-05-02

    申请号：US16748523

    申请日：2020-01-21

    申请人： Barrick Gold Corporation

    发明人： Oscar German Olvera Olmedo ,  Daniel Feliks Raphael Domanski

    IPC分类号： C22B11/00 ,  C22B3/42

    摘要： The present disclosure is directed to a gold recovery process in which activated carbon or another carbon-based material is used to accelerate thiosulfate leaching of gold from a gold-bearing material. In some embodiments, the gold recovery process comprises providing particulate activated carbon or another carbon-based material, providing a precious metal-bearing material, contacting the precious metal-bearing material with the particulate carbon-based material, thiosulfate, an anion exchange resin, and an oxidant to form a slurry comprising a slurried precious metal-bearing material, and leaching a precious metal from the slurried precious metal-bearing material.

    PRODUCTION OF ZINC SULPHATE CONCENTRATES FROM A DILUTE ZINC SULPHATE SOLUTION
    28.
    发明申请
    PRODUCTION OF ZINC SULPHATE CONCENTRATES FROM A DILUTE ZINC SULPHATE SOLUTION 有权
    从二硫化锌溶液中生产锌盐酸盐浓度

    公开(公告)号：US20110165059A1

    公开(公告)日：2011-07-07

    申请号：US12986898

    申请日：2011-01-07

    申请人： Yeonuk Choi

    发明人： Yeonuk Choi

    IPC分类号： C01G9/06 ,  C01F11/46

    CPC分类号： C01F11/46 ,  C01G9/02 ,  C01G9/06

    摘要： In an embodiment, the present invention relates to an apparatus and a process for producing a concentrated form of basic zinc sulphate from a, typically dilute, acidic zinc sulphate-bearing solution. The process embodiment comprises the steps of precipitating the zinc, preferably primarily as basic zinc sulphate, from the acidic zinc sulphate solution, preferably using calcium oxide, in such a way as to promote the formation of separate gypsum crystals and basic zinc sulphate particles, and upgrading the zinc content in the precipitates by separating the basic zinc sulphate from the gypsum using size separation techniques.

    摘要翻译： 在一个实施方案中，本发明涉及从通常为稀酸性的含硫酸锌的溶液中生产浓缩形式的碱式硫酸锌的装置和方法。 该方法的实施方案包括如下步骤：将锌，优选主要作为碱性硫酸锌从酸性硫酸锌溶液中沉淀出来，优选使用氧化钙，以促进单独的石膏晶体和碱性硫酸锌颗粒的形成，以及 通过使用尺寸分离技术从石膏中分离碱性硫酸锌来提高沉淀物中的锌含量。