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1. 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。

2. 发明公开

US20230151454A1 PROCESS FOR THE RECOVERY OF GOLD FROM CARBON FINES WASTE 审中-公开
公开(公告)号：US20230151454A1
公开(公告)日：2023-05-18
申请号：US18054721
申请日：2022-11-11
申请人： PROCESS RESEARCH ORTECH INC.
发明人： Md. Abdul HALIM , Jonathan CHEN , Vaikuntam I. LAKSHMANAN , Sankar DASGUPTA
IPC分类号： C22B11/00 , C22B3/12
CPC分类号： C22B11/04 , C22B3/12
摘要： A process for the recovery of gold from carbon fines waste, which are produced, especially from carbon-in-leach (CIL) and carbon-in-pulp (CIP) processes. The gold may be eluted from carbon fines with alkaline eluent having a low oxidation reduction potential (ORP). Value added products may be obtained from the extracted carbon fines.

3. 发明申请

US20160301108A1 RECHARGEABLE CHLORIDE BATTERY 审中-公开
标题翻译：可充电的氯化锂电池
公开(公告)号：US20160301108A1
公开(公告)日：2016-10-13
申请号：US15092717
申请日：2016-04-07
申请人： PROCESS RESEARCH ORTECH INC.
发明人： Ashok Bhowmick , Ramamritham Sridhar , Vaikuntam I. Lakshmanan
IPC分类号： H01M10/39 , H01M4/46 , H01M4/583
CPC分类号： H01M10/399 , H01M4/463 , H01M4/583 , H01M2004/027 , H01M2004/028 , H01M2300/0057
摘要： The present invention relates to storage batteries, also known as rechargeable batteries, using a chloride electrolyte, especially in which the electrolyte is a ternary chloroaluminate. In particular embodiments, the electrolyte is molten chloroaluminate and especially molten at a temperature of about 140° C. In another embodiment, the electrolyte is in a liquid state, especially at a temperature in the range of −27° C. to 110° C. The preferred electrodes are aluminum and graphite. The batteries have a variety of uses, particularly including storage of electricity for future use.
摘要翻译：本发明涉及使用氯化物电解质的蓄电池，也称为可充电电池，特别是其中电解质是三元氯铝酸盐。在特定的实施方案中，电解质是熔融氯铝酸盐，特别是在约140℃的温度下熔融。在另一个实施方案中，电解质处于液态，特别是在-27℃至110℃ 优选的电极是铝和石墨。电池具有多种用途，特别是电力储存以供日后使用。

4. 发明授权

US09115419B2 Process for extraction of rare earth elements 有权
标题翻译：稀土元素提取工艺
公开(公告)号：US09115419B2
公开(公告)日：2015-08-25
申请号：US13858166
申请日：2013-04-08
申请人： Process Research Ortech Inc.
发明人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , M. A. Halim
IPC分类号： C22B59/00 , C22B3/08 , C22B3/10
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℃至该溶液的沸点和至少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。

5. 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。

6. 发明授权

US10053750B2 Recovery of nickel in leaching of laterite ores 有权
公开(公告)号：US10053750B2
公开(公告)日：2018-08-21
申请号：US14225639
申请日：2014-03-26
申请人： Process Research Ortech Inc.
发明人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , Md. Abdul Halim , Jonathan Chen , Robert J. DeLaat
IPC分类号： C22B3/00 , C22B3/30
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.

7. 发明授权

US10041141B2 Process for the separation of iron in extraction of titanium in mixed chloride media 有权
公开(公告)号：US10041141B2
公开(公告)日：2018-08-07
申请号：US14649904
申请日：2013-11-29
申请人： Process Research Ortech Inc.
发明人： Vaikuntam I Lakshmanan , Ramamritham Sridhar , Dipak Patel
IPC分类号： C22B3/00 , C22B3/26 , C22B3/44 , C22B3/10 , C22B34/12
摘要： A process for leaching a value metal from a titaniferous ore material comprising the step of leaching the ore material at atmospheric pressure with a lixiviant comprising magnesium chloride and hydrochloric acid is disclosed. Iron and titanium are leached into solution. Iron in the ferric state may be separated from titanium in solution using extraction with alkyl ketone. More effective separation of titanium with lower contamination with iron is obtained.

8. 发明授权

US09732398B2 Chloride process for the leaching of gold 有权
公开(公告)号：US09732398B2
公开(公告)日：2017-08-15
申请号：US13858147
申请日：2013-04-08
申请人： Process Research Ortech Inc.
发明人： Vaikuntam I. Lakshmanan , Ramamritham Sridhar , M. A. Halim
IPC分类号： C22B3/00 , C22B3/10
CPC分类号： C22B11/04 , C22B3/10 , Y02P10/234
摘要： A process for the extraction of gold from a gold-bearing ore or concentrate, comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90° C. and an Eh of at least 900 mV. After a liquid/solids separation step, the solution obtained is subjected to an organic solvent extraction step using an oxime to obtain a solution of organic solvent containing gold, which is stripped with sodium thiosulphate to recover gold. The extraction may be operated to extract gold with or without iron. Materials used in the process may be recycled. The process avoids environmental and other hazards associated with the use of cyanide to extract gold.

9. 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）。

10. 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。

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