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公开(公告)号：US20140212346A1
公开(公告)日：2014-07-31
申请号：US14239000
申请日：2012-08-14
申请人： Chen Xia
发明人： Chen Xia
IPC分类号： C22B3/00
摘要： The invention relates to modifications of a non-ammoniacal thiosulfate process of leaching precious metals (e.g. gold or silver) from precious metal-containing ores. The process involves leaching the ore with an aqueous lixiviant containing a soluble thiosulfate other than ammonium thiosulfate, a copper compound and an organic compound that serves as a copper ligand (i.e. a ligand-forming compound). Four modifications of this process are effective for increasing the amount of precious metal that can be extracted, reducing the consumption of materials, or for improving the rate of extraction. These four process, which may be used singly or in any combination, include (a) additions of soluble lead (e.g. as lead nitrate), (b) additions of thiourea, (c) increases in dissolved oxygen, and (d) increases of temperature at ambient pressure. This avoids the use environmentally harmful chemicals and allows for extraction from a variety of ores, e.g., containing substantial amounts of sulfides and/or quartz.
摘要翻译： 本发明涉及从含贵金属的矿石中浸出贵金属（例如金或银）的非氨硫代硫酸盐方法的改进。 该方法包括用除了硫代硫酸铵以外的可溶性硫代硫酸盐，铜化合物和用作铜配体的有机化合物（即配体形成化合物）的含水浸液浸出矿石。 该方法的四个修改对于增加可以提取的贵金属的量，减少材料的消耗或提高提取速率是有效的。 这四种方法可以单独使用或以任意组合使用，包括（a）添加可溶性铅（如硝酸铅），（b）添加硫脲，（c）溶解氧增加，（d）增加 环境压力下的温度。 这避免了使用对环境有害的化学品，并允许从各种矿石中提取，例如含有大量的硫化物和/或石英。
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公开(公告)号：US07985277B2
公开(公告)日：2011-07-26
申请号：US12281568
申请日：2007-03-05
申请人： Chen Xia , Wan-Tai Yen
发明人： Chen Xia , Wan-Tai Yen
IPC分类号： C22B3/04
CPC分类号： C22B3/08 , C22B3/24 , C22B11/04 , Y02P10/234
摘要： A process for extracting gold from a gold-bearing ore. The process includes, first, providing a leaching liquor with thiosulfate anion and ethylenediamine. Next, the leaching liquor is contacted with the gold-bearing ore to form a pregnant leach solution including gold dissolved from the gold-bearing ore. Finally, at least part of the gold in the pregnant leach solution is recovered.
摘要翻译： 从含金矿石中提取黄金的方法。 该方法首先提供一种含有硫代硫酸根阴离子和乙二胺的浸出液。 接下来，浸出液与含金矿石接触，形成含金矿石溶解的金的浸出溶液。 最后，怀孕浸出溶液中至少部分金子被回收。
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公开(公告)号：US20100116092A1
公开(公告)日：2010-05-13
申请号：US12281568
申请日：2007-03-05
申请人： Chen Xia , Wan-Tai Yen
发明人： Chen Xia , Wan-Tai Yen
CPC分类号： C22B3/08 , C22B3/24 , C22B11/04 , Y02P10/234
摘要： A process for extracting gold from a gold-bearing ore. The process includes, first, providing a leaching liquor with thiosulfate anion and ethylenediamine. Next, the leaching liquor is contacted with the gold-bearing ore to form a pregnant leach solution including gold dissolved from the gold-bearing ore. Finally, at least part of the gold in the pregnant leach solution is recovered.
摘要翻译： 从含金矿石中提取黄金的方法。 该方法首先提供一种含有硫代硫酸根阴离子和乙二胺的浸出液。 接下来，浸出液与含金矿石接触，形成含金矿石溶解的金的浸出溶液。 最后，怀孕浸出溶液中至少部分金子被回收。
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公开(公告)号：US09150942B2
公开(公告)日：2015-10-06
申请号：US14239000
申请日：2012-08-14
申请人： Chen Xia
发明人： Chen Xia
摘要： The invention relates to modifications of a non-ammoniacal thiosulfate process of leaching precious metals (e.g. gold or silver) from precious metal-containing ores. The process involves leaching the ore with an aqueous lixiviant containing a soluble thiosulfate other than ammonium thiosulfate, a copper compound and an organic compound that serves as a copper ligand (i.e. a ligand-forming compound). Four modifications of this process are effective for increasing the amount of precious metal that can be extracted, reducing the consumption of materials, or for improving the rate of extraction. These four process, which may be used singly or in any combination, include (a) additions of soluble lead (e.g. as lead nitrate), (b) additions of thiourea, (c) increases in dissolved oxygen, and (d) increases of temperature at ambient pressure. This avoids the use environmentally harmful chemicals and allows for extraction from a variety of ores, e.g., containing substantial amounts of sulfides and/or quartz.
摘要翻译： 本发明涉及从含贵金属的矿石中浸出贵金属（例如金或银）的非氨硫代硫酸盐方法的改进。 该方法包括用除了硫代硫酸铵以外的可溶性硫代硫酸盐，铜化合物和用作铜配体的有机化合物（即配体形成化合物）的含水浸液浸出矿石。 该方法的四个修改对于增加可以提取的贵金属的量，减少材料的消耗或提高提取速率是有效的。 这四种方法可以单独使用或以任意组合使用，包括（a）添加可溶性铅（如硝酸铅），（b）添加硫脲，（c）溶解氧增加，（d）增加 环境压力下的温度。 这避免了使用对环境有害的化学品，并允许从各种矿石中提取，例如含有大量的硫化物和/或石英。
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公开(公告)号：US07972413B2
公开(公告)日：2011-07-05
申请号：US12296159
申请日：2007-04-05
申请人： Chen Xia
发明人： Chen Xia
摘要： A method for recovering precious metals such as gold and silver from aqueous solution as solid is described The method includes mixing an aqueous solution (e.g, thiosulfate or thiocyanate lixiviant) containing precious metals with ferrous ions in the presence of an effective amount of hydroxide ions. The precious metal ions are reduced and co-precipitate with iron hydroxides and/or hydrated iron oxides The co-precipitate is collected and purified. De-oxygenation of the reaction solution is optional. The recover/method is fast, complete and clean.
摘要翻译： 描述了从作为固体的水溶液中回收贵金属如金和银的方法。该方法包括在有效量的氢氧根离子存在下，将含有贵金属的水溶液（例如硫代硫酸盐或硫氰酸盐浸渍剂）与亚铁离子混合。 贵金属离子被还原并与氢氧化铁和/或水合氧化铁共沉淀。收集并纯化共沉淀物。 反应溶液的脱氧是任选的。 恢复/方法快速，完整和干净。
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公开(公告)号：US20100025259A1
公开(公告)日：2010-02-04
申请号：US12296159
申请日：2007-04-05
申请人： Chen Xia
发明人： Chen Xia
摘要： A method for recovering precious metals such as gold and silver from aqueous solution as solid is described The method includes mixing an aqueous solution (e.g, thiosulfate or thiocyanate lixiviant) containing precious metals with ferrous ions in the presence of an effective amount of hydroxide ions. The precious metal ions are reduced and co-precipitate with iron hydroxides and/or hydrated iron oxides The co-precipitate is collected and purified. De-oxygenation of the reaction solution is optional. The recover/method is fast, complete and clean.
摘要翻译： 描述了从作为固体的水溶液中回收贵金属如金和银的方法。该方法包括在有效量的氢氧根离子存在下，将含有贵金属的水溶液（例如硫代硫酸盐或硫氰酸盐浸渍剂）与亚铁离子混合。 贵金属离子被还原并与氢氧化铁和/或水合氧化铁共沉淀。收集并纯化共沉淀物。 反应溶液的脱氧是任选的。 恢复/方法快速，完整和干净。
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