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1. 发明申请

US20050142051A1 Process for the recovery of titanium in mixed chloride media 有权
标题翻译：在混合氯化物介质中回收钛的方法
公开(公告)号：US20050142051A1
公开(公告)日：2005-06-30
申请号：US10981143
申请日：2004-11-04
申请人： Vaikuntum Lakshmanan , Ramamritham Sridhar , G. Harris , George Puvvada
发明人： Vaikuntum Lakshmanan , Ramamritham Sridhar , G. Harris , George Puvvada
IPC分类号： C22B3/06 , C22B3/10 , C22B34/10 , C22B34/12
CPC分类号： C22B34/1245 , C22B3/10 , Y02P10/234
摘要： A process for leaching a value metal from a titanium-bearing ore material comprising the step of leaching the ore material at atmospheric pressure with a lixiviant comprising a chloride and hydrochloric acid is disclosed. The leaching conditions are such that titanium is leached and remains in solution. The temperature is maintained at less that 85° C., and the concentration of hydrochloric acid is preferably less than 20% (mass ratio). The preferred chloride is magnesium chloride. The lixiviant may contain oxidant e.g. sodium chlorate or chlorine.
摘要翻译：公开了一种用于从含钛矿石材料中浸出含金属的方法，包括在大气压下用含氯化物和盐酸的浸液浸出矿石材料的步骤。浸出条件是使钛浸出并保留在溶液中。温度保持在85℃以下，盐酸浓度优选小于20％（质量比）。优选的氯化物是氯化镁。浸渍剂可含有氧化剂氯酸钠或氯气。

2. 发明申请

US20050118081A1 Process for the recovery of value metals from base metal sulfide ores 有权
标题翻译：从金属硫化物矿石中回收有价金属的工艺
公开(公告)号：US20050118081A1
公开(公告)日：2005-06-02
申请号：US10950671
申请日：2004-09-28
申请人： G. Harris , Vaikuntam Lakshmanan , Ramamritham Sridhar , George Puvvada
发明人： G. Harris , Vaikuntam Lakshmanan , Ramamritham Sridhar , George Puvvada
IPC分类号： B01D11/00 , B01D11/02 , B01D15/00 , B01F1/00 , B03C1/00 , C01G3/00 , C01G3/04 , C01G5/00 , C01G7/00 , C01G9/00 , C01G11/00 , C01G13/00 , C01G55/00 , C22B3/00 , C22B3/04 , C22B3/06 , C22B3/10 , C22B3/12 , C22B11/00 , C22B11/06 , C22B15/00 , C22B17/00 , C22B23/00
CPC分类号： C22B23/0461 , C22B3/10 , C22B15/0069 , C22B15/0093 , C22B23/0423 , Y02P10/234 , Y02P10/236
摘要： A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed. The leaching is controlled, by use of low concentrations of hydrochloric acid and a redox potential, to effect formation of hydrogen sulfide from the base metal sulfide ore. The hydrogen sulfide is stripped from the leach solution, thereby reducing the amount of sulfate generated in the leach to very low levels. The leaching may also be conducted to limit the co-dissolution of platinum group metals and gold with the base value metals. The leach forms a value metal-rich leachate and a solids residue. The solids residue may be subsequently leached to recover the platinum group metals and gold. The value metal-rich leachate can be is oxidized and neutralized to recover the value base metals. In an embodiment, the chloride is magnesium chloride and lixiviant solution is regenerated.
摘要翻译：公开了一种用于从碱金属硫化物矿石中浸出值金属的方法，其包括用包含氯化物，氧化剂和盐酸的浸液浸出矿石的步骤。通过使用低浓度的盐酸和氧化还原电位来控制浸出，从而从硫化贱金属矿石中形成硫化氢。从浸出溶液中汽提硫化氢，从而将浸出液中产生的硫酸盐的量减少到非常低的水平。还可以进行浸出以限制铂族金属和金与基础金属的共溶解。浸出液形成富含金属的浸出液和固体残渣。随后浸出固体残渣以回收铂族金属和金。价值金属富集的浸出液可以被氧化和中和以回收碱金属的价值。在一个实施方案中，氯化物是氯化镁，并且溶液被再生。

3. 发明授权

US07803336B2 Process for the recovery of titanium in mixed chloride media 有权
标题翻译：在混合氯化物介质中回收钛的方法
公开(公告)号：US07803336B2
公开(公告)日：2010-09-28
申请号：US10981143
申请日：2004-11-04
申请人： Vaikuntum I. Lakshmanan , Ramamritham Sridhar , G. Bryn Harris , George Puvvada
发明人： Vaikuntum I. Lakshmanan , Ramamritham Sridhar , G. Bryn Harris , George Puvvada
IPC分类号： C01G23/02 , C01G23/047 , C01G23/07
CPC分类号： C22B34/1245 , C22B3/10 , Y02P10/234
摘要： A process for leaching a value metal from a titanium-bearing ore material comprising the step of leaching the ore material at atmospheric pressure with a lixiviant comprising a chloride and hydrochloric acid is disclosed. The leaching conditions are such that titanium is leached and remains in solution. The temperature is maintained at less that 85° C., and the concentration of hydrochloric acid is preferably less than 20% (mass ratio). The preferred chloride is magnesium chloride. The lixiviant may contain oxidant e.g. sodium chlorate or chlorine.
摘要翻译：公开了一种用于从含钛矿石材料中浸出金属的方法，包括在大气压下用含氯化物和盐酸的浸液浸取矿石材料的步骤。浸出条件是使钛浸出并保留在溶液中。温度保持在85℃以下，盐酸浓度优选小于20％（质量比）。优选的氯化物是氯化镁。浸渍剂可含有氧化剂氯酸钠或氯气。

4. 发明授权

US07736606B2 Process for the recovery of value metals from base metal sulfide ores 有权
标题翻译：从金属硫化物矿石中回收有价金属的工艺
公开(公告)号：US07736606B2
公开(公告)日：2010-06-15
申请号：US10950671
申请日：2004-09-28
申请人： G. Bryn Harris , Vaikuntam I. Lakshmanan , Ramamritham Sridhar , George Puvvada
发明人： G. Bryn Harris , Vaikuntam I. Lakshmanan , Ramamritham Sridhar , George Puvvada
IPC分类号： C22B11/06 , C22B3/10 , C22B3/12
CPC分类号： C22B23/0461 , C22B3/10 , C22B15/0069 , C22B15/0093 , C22B23/0423 , Y02P10/234 , Y02P10/236
摘要： A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed. The leaching is controlled, by use of low concentrations of hydrochloric acid and a redox potential, to effect formation of hydrogen sulfide from the base metal sulfide ore. The hydrogen sulfide is stripped from the leach solution, thereby reducing the amount of sulfate generated in the leach to very low levels. The leaching may also be conducted to limit the co-dissolution of platinum group metals and gold with the base value metals. The leach forms a value metal-rich leachate and a solids residue. The solids residue may be subsequently leached to recover the platinum group metals and gold. The value metal-rich leachate can be is oxidized and neutralized to recover the value base metals. In an embodiment, the chloride is magnesium chloride and lixiviant solution is regenerated.
摘要翻译：公开了一种用于从碱金属硫化物矿石中浸出值金属的方法，其包括用包含氯化物，氧化剂和盐酸的浸液浸出矿石的步骤。通过使用低浓度的盐酸和氧化还原电位来控制浸出，从而从硫化贱金属矿石中形成硫化氢。从浸出溶液中汽提硫化氢，从而将浸出液中产生的硫酸盐的量减少到非常低的水平。还可以进行浸出以限制铂族金属和金与基础金属的共溶解。浸出液形成富含金属的浸出液和固体残渣。随后浸出固体残渣以回收铂族金属和金。价值金属富集的浸出液可以被氧化和中和以回收碱金属的价值。在一个实施方案中，氯化物是氯化镁，并且溶液被再生。

5. 发明申请

US20130149219A1 SEPARATION OF IRON FROM VALUE METALS IN LEACHING OF LATERITE ORES 有权
标题翻译：从金属矿物中分离出来的铁矿石
公开(公告)号：US20130149219A1
公开(公告)日：2013-06-13
申请号：US13711874
申请日：2012-12-12
申请人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , Jonathan Chen , M. A. Halim , Robert DeLaat
发明人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , Jonathan Chen , M. A. Halim , Robert DeLaat
IPC分类号： C21B3/00 , C22B3/00
CPC分类号： C21B3/00 , C22B3/0021 , C22B23/0423 , Y02P10/234
摘要： The invention provides a process for the leaching of a laterite ore, concentrate, tailings or waste rock for the recovery of value metals, at least one value metal being nickel. The laterite ore or concentrate is subjected to a leaching step with a lixiviant comprising hydrochloric acid to leach nickel from the laterite ore, followed by a liquid/solids separation step. The liquid obtained is subject to solvent extraction with a dialkyl ketone, to obtain a solution rich in iron and a raffinate. Separation of iron from cobalt and nickel is obtained.
摘要翻译：本发明提供了用于回收高价值金属的红土矿石，浓缩物，尾矿或废石的浸出方法，至少一种价值金属为镍。将红土矿石或浓缩物用含有盐酸的浸液浸出浸出步骤，从红土矿石中浸出镍，然后进行液/固分离步骤。得到的液体用二烷基酮进行溶剂萃取，得到富含铁和萃余液的溶液。得到铁与钴和镍的分离。

6. 发明授权

US3984232A Thermal upgrading of sea nodules 失效
标题翻译：海结核的热升级
公开(公告)号：US3984232A
公开(公告)日：1976-10-05
申请号：US498610
申请日：1974-08-19
申请人： Malcolm Charles Evert Bell , Ramamritham Sridhar
发明人： Malcolm Charles Evert Bell , Ramamritham Sridhar
IPC分类号： C22B5/02 , C22B47/00 , C21B11/00
CPC分类号： C22B47/00 , C22B5/02 , Y10S423/04
摘要： Manganiferous oxide minerals, particularly sea nodules, containing at least one metal value selected from the group consisting of cobalt, copper, iron, molybdenum and nickel and a reductant are heated to a temperature above about 1100.degree.C. to selectively reduce the metal values to metal and only minor amounts of the manganese values to metal and to coalesce the reduced metal values. The coalesced metal values are recovered by techniques such as magnetic separation, flotation and tabling to produce a concentrate of the metal values.
摘要翻译：将含有选自钴，铜，铁，钼和镍中的至少一种金属值和还原剂的含锰氧化物矿物，特别是海结核，加热至约1100℃以上以选择性地将金属值降低至金属，并且仅有少量的锰值与金属并且合并还原的金属值。通过诸如磁分离，浮选和压片的技术回收合并的金属值，以产生金属浓度。

7. 发明授权

US08337795B2 Production of high purity silicon from amorphous silica 失效
标题翻译：从无定形二氧化硅生产高纯度硅
公开(公告)号：US08337795B2
公开(公告)日：2012-12-25
申请号：US12862925
申请日：2010-08-25
申请人： Mansoor Barati , Kingsley Kweku Larbi , Raja Roy , Vaikuntam I. Lakshmanan , Ramamritham Sridhar
发明人： Mansoor Barati , Kingsley Kweku Larbi , Raja Roy , Vaikuntam I. Lakshmanan , Ramamritham Sridhar
IPC分类号： C01B33/02
CPC分类号： C01B33/023 , C01B33/025 , C01P2006/80
摘要： A process to the production of silicon from amorphous silica is disclosed. The amorphous silica is formed from a material rich in silica, especially rice husk ash or silica fume. The process comprises subjecting the amorphous silica to leaching with a lixiviant of aqueous mineral acid, especially hydrochloric acid. Preferably, material rich in silica is roasted at a temperature of not more than 850° C., subjected to leaching and then subjected to a second roasting at a temperature of less than 750° C. The process provides for the production of high purity silicon, especially to the production of solar grade silicon (SoG-Si).
摘要翻译：公开了一种从无定形二氧化硅生产硅的方法。无定形二氧化硅由富含二氧化硅的材料形成，特别是稻壳灰或硅灰。该方法包括使无定形二氧化硅用无机酸水溶液，特别是盐酸浸取。优选地，将富含二氧化硅的材料在不高于850℃的温度下焙烧，进行浸出，然后在小于750℃的温度下进行第二次焙烧。该方法提供了生产高纯度硅，特别是生产太阳能级硅（SoG-Si）。

8. 发明申请

US20110052475A1 Production of High Purity Silicon from Amorphous Silica 失效
标题翻译：从无定形二氧化硅生产高纯度硅
公开(公告)号：US20110052475A1
公开(公告)日：2011-03-03
申请号：US12862925
申请日：2010-08-25
申请人： Mansoor Barati , Kingsley Kweku Larbi , Raja Roy , Vaikuntam I. Lakshmanan , Ramamritham Sridhar
发明人： Mansoor Barati , Kingsley Kweku Larbi , Raja Roy , Vaikuntam I. Lakshmanan , Ramamritham Sridhar
IPC分类号： C01B33/025 , C01B33/021 , C01B33/023
CPC分类号： C01B33/023 , C01B33/025 , C01P2006/80
摘要： A process to the production of silicon from amorphous silica is disclosed. The amorphous silica is formed from a material rich in silica, especially rice husk ash or silica fume. The process comprises subjecting the amorphous silica to leaching with a lixiviant of aqueous mineral acid, especially hydrochloric acid. Preferably, material rich in silica is roasted at a temperature of not more than 850° C., subjected to leaching and then subjected to a second roasting at a temperature of less than 750° C. The process provides for the production of high purity silicon, especially to the production of solar grade silicon (SoG-Si).
摘要翻译：公开了一种从无定形二氧化硅生产硅的方法。无定形二氧化硅由富含二氧化硅的材料形成，特别是稻壳灰或硅灰。该方法包括使无定形二氧化硅用无机酸水溶液，特别是盐酸浸取。优选地，将富含二氧化硅的材料在不高于850℃的温度下焙烧，进行浸出，然后在小于750℃的温度下进行第二次焙烧。该方法提供了生产高纯度硅，特别是生产太阳能级硅（SoG-Si）。

9. 发明授权

US06500396B1 Separation of titanium halides from aqueous solutions 有权
标题翻译：从水溶液中分离卤代钛
公开(公告)号：US06500396B1
公开(公告)日：2002-12-31
申请号：US09441131
申请日：1999-11-17
申请人： Vaikuntam Iyer Lakshmanan , Ramamritham Sridhar , Marc Murray Rishea , Robert Joseph de Laat
发明人： Vaikuntam Iyer Lakshmanan , Ramamritham Sridhar , Marc Murray Rishea , Robert Joseph de Laat
IPC分类号： C22B3400
CPC分类号： C22B3/0005 , C22B34/1245 , C22B34/1259 , Y02P10/234
摘要： A method for the production of titanium metal from titanium-bearing ore. The method comprises leaching said ore or a concentrate thereof with an aqueous solution of a hydrogen halide; separating solids from the leach solution, to provide a leachate solution. The leachate solution may be subjected to extraction with an immiscible organic phase. Titanium halide is separated from the organic phase by stripping. Preferably, the titanium halide is titanium tetrachloride.
摘要翻译：一种从含钛矿石生产钛金属的方法。该方法包括用卤化氢水溶液浸出所述矿石或其浓缩物; 从浸出溶液中分离固体，以提供渗滤液。浸出液可以用不混溶的有机相进行萃取。通过汽提将卤化钛与有机相分离。优选地，卤化钛是四氯化钛。

10. 发明授权

US4168217A Roast-leach copper recovery 失效
标题翻译：烤铜回收
公开(公告)号：US4168217A
公开(公告)日：1979-09-18
申请号：US894900
申请日：1978-04-10
申请人： Ashok D. Dalvi , Ramamritham Sridhar , Malcolm C. E. Bell
发明人： Ashok D. Dalvi , Ramamritham Sridhar , Malcolm C. E. Bell
IPC分类号： C22B15/00 , C25C1/12
CPC分类号： C22B15/0015 , C22B15/0071 , Y02P10/236
摘要： A copper-containing sulfidic material is dead-roasted at a temperature of at least 750.degree. C. and the resulting calcine is leached in a sulfuric acid solution to dissolve most of the copper in preference to any iron, nickel and cobalt in the material.
摘要翻译：含铜硫化物料在至少750℃的温度下进行死烤，并将所得的煅烧物浸在硫酸溶液中，以优先于材料中的任何铁，镍和钴溶解大部分铜。

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