专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 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。

2. 发明授权

US5290525A Removal of base metals and cyanide from gold-barren CIP solutions 失效
标题翻译：从金 - 贫瘠CIP溶液中去除贱金属和氰化物
公开(公告)号：US5290525A
公开(公告)日：1994-03-01
申请号：US945018
申请日：1992-09-14
申请人： Vaikuntam I. Lakshmanan
发明人： Vaikuntam I. Lakshmanan
IPC分类号： C01C3/11 , C22B3/24 , C22B11/08 , C01G49/00 , C01G3/00 , C01G9/00
CPC分类号： C22B11/08 , C22B3/42 , Y02P10/234 , Y02W10/37
摘要： Processes are provided for substantially removing base metals and/or cyanide from gold-barren solutions resulting from gold ore processing.
摘要翻译：提供了用于从金矿加工产生的金 - 贫的溶液基本上除去碱金属和/或氰化物的方法。

3. 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）。

4. 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）。

5. 发明申请

US20130283977A1 PROCESS FOR EXTRACTION OF RARE EARTH ELEMENTS 有权
标题翻译：提取稀土元素的方法
公开(公告)号：US20130283977A1
公开(公告)日：2013-10-31
申请号：US13858166
申请日：2013-04-08
申请人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , M. A. Halim
发明人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , M. A. Halim
IPC分类号： C22B59/00
CPC分类号： C22B59/00 , C22B3/08 , C22B3/10 , Y02P10/234
摘要： A process for the extraction of rare earth elements, including yttrium, from a rare earth element-bearing ore or concentrate, comprising the steps of leaching the rare earth element-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of from 90° C. to the boiling point of the solution and at an Eh of at least 200 mV. After a liquid/solids separation step, the solution obtained is subjected to steps for removal of iron and for recovery of rare earth elements. Alternatively, rare earth element-bearing ore or concentrate may be leached with sulphuric acid and liquid obtained subjected to extraction of iron and other impurities. Raffinate obtained may be treated with oxalic acid, the precipitate dissolved in hydrochloric acid and subjected to solvent extraction for rare earth elements or the raffinate may be subjected to solvent extraction for removal of rare earth elements and then stripped with hydrochloric acid.
摘要翻译：一种从含有稀土元素的矿石或浓缩物中提取稀土元素（包括钇）的方法，包括以下步骤：在大气压力下将含稀土元素的矿石或浓缩物与盐酸和氯化镁的浸液浸出在90℃至该溶液的沸点，至少200mV的Eh下进行。在液/固分离步骤之后，将所得溶液进行除铁和用于回收稀土元素的步骤。或者，稀土元素矿石或浓缩物可以用硫酸浸出，所得液体经铁提取和其他杂质。得到的残液可用草酸处理，沉淀溶解于盐酸中，进行稀土元素的溶剂萃取，或萃取液进行溶剂萃取除去稀土元素，然后用盐酸汽提。

6. 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。

7. 发明授权

US4966761A Process for treatment of flyash 失效
标题翻译：飞灰处理工艺
公开(公告)号：US4966761A
公开(公告)日：1990-10-30
申请号：US220763
申请日：1988-07-14
申请人： Vaikuntam I. Lakshmanan , Dzinsars Melnbardis , Robert A. Geisler , Nairn M. McQueen
发明人： Vaikuntam I. Lakshmanan , Dzinsars Melnbardis , Robert A. Geisler , Nairn M. McQueen
IPC分类号： C01B39/02 , C01G31/00 , C22B7/02 , C22B34/22
CPC分类号： C22B7/02 , C01B39/02 , C01G31/003 , C22B34/22 , Y02P10/234
摘要： A process is described for recovering vanadium and zeolitic alumino-silicates from flyash and similar carbon-bearing heat treated materials. The process includes steps for the separation of carbon, followed by pressure leaching the carbon-depleted flyash in relatively dilute alkali metal hydroxide solutions at elevated temperatures. The leach liquor is separated from the residue and is subsequently treated in an amine containing solvent extraction process step for vanadium recovery, and optionally, for other metals present in the leach liquor. The vanadium in the strip liquor is precipitated to obtain vanadium containing compounds.The leach residue is treated separately to recover zeolitic alumino-silicates therefrom.In another variation of the process, the vanadium is recovered from the leach liquor by means of a strong base anoin exchange resin.

8. 发明授权

US08916116B2 Separation of iron from value metals in leaching of laterite ores 有权
标题翻译：在红土矿石浸出中分离铁与有价金属
公开(公告)号：US08916116B2
公开(公告)日：2014-12-23
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： C22B3/00 , C21B3/00 , C22B3/26
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。

9. 发明申请

US20140294702A1 RECOVERY OF NICKEL IN LEACHING OF LATERITE ORES 审中-公开
标题翻译：镍矿废渣中镍的恢复
公开(公告)号：US20140294702A1
公开(公告)日：2014-10-02
申请号：US14225639
申请日：2014-03-26
申请人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , Md. Abdul Halim , Jonathan Chen , Robert J. DeLaat
发明人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , Md. Abdul Halim , Jonathan Chen , Robert J. DeLaat
IPC分类号： C22B3/00
CPC分类号： C22B23/0484 , C22B3/0017 , C22B23/0423 , Y02P10/234
摘要： The invention provides a process for the leaching of a laterite ore or concentrate 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. Nickel is extracted with an oxime at a lower pH than other processes for extraction of nickel from solution, especially after separation of iron and cobalt values.
摘要翻译：本发明提供了一种用于浸出红土矿石或浓缩物以回收有价金属的方法，至少一种价值金属为镍。将红土矿石或浓缩物与含盐酸的浸液一起进行浸出步骤，以从红土矿石中浸出镍。镍在比其他从溶液中提取镍的方法的pH低的情况下用肟萃取，特别是在分离铁和钴之后。

10. 发明授权

US07329396B2 Process for the recovery of value metals from material containing base metal oxides 失效
标题翻译：从含有贱金属氧化物的材料中回收有价金属的方法
公开(公告)号：US07329396B2
公开(公告)日：2008-02-12
申请号：US10844315
申请日：2004-05-13
申请人： G. Bryn Harris , Vaikuntam I. Lakshmanan , Ramamritham Sridhar
发明人： G. Bryn Harris , Vaikuntam I. Lakshmanan , Ramamritham Sridhar
IPC分类号： C01G51/04 , C01G49/02 , C01F5/10
CPC分类号： C22B3/44 , C22B23/0423 , C22B23/0453 , C22B23/0461 , Y02P10/234
摘要： A process for leaching a value metal from oxidic materials, such as a lateritic nickel ore, comprising the step of leaching the ore with a lixiviant comprising a cationic salt (e.g., magnesium chloride) and hydrochloric acid is disclosed. An oxidant or additional metal chloride (such as that which results from the leaching operation) may be added. In one embodiment, the process comprises recovery of a value metal from ore comprising the steps of: leaching the ore with a lixiviant; separating a value metal-rich leachate from the ore in a first solid-liquid separation; oxidizing and neutralizing the value metal-rich leachate so obtained; and separating a solution of magnesium chloride from the leachate so obtained in a second solid-liquid separation. In another embodiment, the lixiviant solution is regenerated from the solution of magnesium chloride. In a further embodiment, regeneration of the lixiviant solution includes a step of producing magnesium oxide from the solution of magnesium chloride.
摘要翻译：公开了一种用于从诸如红土镍矿之类的氧化材料中浸取价值金属的方法，其包括用包含阳离子盐（例如氯化镁）和盐酸的浸液浸出矿石的步骤。可以加入氧化剂或另外的金属氯化物（例如由浸出操作产生的那些）。在一个实施方案中，该方法包括从矿石中回收价值金属，包括以下步骤：用矿物浸出矿石; 在第一固液分离中从矿石中分离价值富金属的渗滤液; 氧化和中和如此获得的富含金属的浸出液; 并在第二固液分离中从如此获得的浸出液中分离出氯化镁溶液。在另一个实施方案中，浸出液从氯化镁溶液中再生。在另一个实施方案中，浸出溶液的再生包括从氯化镁溶液中生产氧化镁的步骤。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式