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21. 发明授权

US4135918A Roast-reductive leach process for copper recovery 失效
标题翻译：用于铜恢复的ROAST-Reduced LEACH工艺
公开(公告)号：US4135918A
公开(公告)日：1979-01-23
申请号：US882610
申请日：1978-03-02
申请人： Victor A. Ettel , Eric A. P. Devuyst , Ramamritham Sridhar , Charles E. O'Neill
发明人： Victor A. Ettel , Eric A. P. Devuyst , Ramamritham Sridhar , Charles E. O'Neill
IPC分类号： C22B15/00 , C22B23/00 , C22B15/08
CPC分类号： C22B15/0093 , C22B15/0015 , C22B15/0071 , C22B23/005 , C22B23/043 , Y02P10/236
摘要： A sulfide containing copper and one or more of iron, nickel and cobalt, is dead-roasted at a temperature of 750.degree. C or above, then subjected to a pressure leach under reducing conditions to produce elemental copper and an aqueous solution of the other metals.

22. 发明授权

US4049444A Process for treatment of lateritic ores 失效
标题翻译：红土矿石处理工艺
公开(公告)号：US4049444A
公开(公告)日：1977-09-20
申请号：US510549
申请日：1974-09-30
申请人： Malcolm Charles Evert Bell , Ramamritham Sridhar
发明人： Malcolm Charles Evert Bell , Ramamritham Sridhar
IPC分类号： C22B23/02 , C22C33/04 , C22B23/00
CPC分类号： C22B23/023
摘要： Recovery, by thermal upgrading, of nickel values from nickeliferous lateritic ores containing a silicate fraction is improved by forming agglomerates of the ore, a reagent containing at least one member selected from the group consisting of alkali or alkaline earth metal compounds in a small but effective amount to increase nickel recovery from the silicate fraction and a liquid hydrocarbon in an amount between about 1 and 12%, based on the weight of the ore and heating a static, shallow bed of the agglomerates established on a moving bed to partially melt the agglomerates to reduce and coalesce the nickel values into easily recoverable ferronickel concentrate. The grade of the ferronickel concentrate can be increased by incorporating a sulfur-bearing material in the agglomerates.
摘要翻译：通过形成矿石附聚物，含有选自碱金属或碱土金属化合物中的至少一种的试剂在小而有效的方法中，通过热升级从含镍的红土矿石中回收镍值得到改善相当于以矿石的重量为基础，从硅酸盐部分和液体烃中提取约1至12％的镍回收量，并加热建立在移动床上的附聚物的静态，浅床，以部分熔化附聚物将镍值还原并结合成易回收的镍铁精矿。通过在附聚物中加入含硫材料可以提高镍铁浓缩物的等级。

23. 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。

24. 发明授权

US06730161B2 Treatment of fly ash 失效
标题翻译：粉煤灰处理
公开(公告)号：US06730161B2
公开(公告)日：2004-05-04
申请号：US10177659
申请日：2002-06-20
申请人： Vaikuntam Iyer Lakshmanan , Ramamritham Sridhar , Noel Paul Mailvaganam , V. Mohan Malhotra
发明人： Vaikuntam Iyer Lakshmanan , Ramamritham Sridhar , Noel Paul Mailvaganam , V. Mohan Malhotra
IPC分类号： C04B1808
CPC分类号： B03B9/04 , C04B18/08 , C04B40/0039 , F23J1/00 , F23J2900/01001 , F23J2900/01003 , F23J2900/01007 , Y02W30/92 , Y10S106/01 , C04B20/02 , C04B20/026 , C04B22/08 , C04B22/064 , C04B14/106 , C04B22/066
摘要： A finely ground powder comprising a mixture of fly ash and a compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite. Preferably, the amount of said compound is 0.4 to 1% by weight of the powder. A composition comprising Portland cement and finely ground powder, said finely ground powder being a mixture of fly ash and a compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite. A method for the treatment of fly ash comprising the step of subjecting a mixture of fly ash and a compound selected from the group consisting of alkali and alkaline earth metal salts, alkali and alkaline earth metal oxides, and metakaolinite, preferably in which the fly ash has been treated for removal of carbon and in particular to increase the amount of crystalline phase.
摘要翻译：一种细磨粉末，其包含飞灰和选自碱金属和碱土金属盐，碱金属和碱土金属氧化物和偏高岭土的化合物的混合物。优选地，所述化合物的量为粉末的0.4至1重量％。一种包含硅酸盐水泥和细磨粉末的组合物，所述细磨粉末是飞灰和选自碱金属和碱土金属盐，碱金属和碱土金属氧化物和偏高岭土的化合物的混合物。一种处理飞灰的方法，包括对飞灰和选自碱金属和碱土金属盐，碱金属和碱土金属氧化物和偏高岭土的化合物的混合物进行处理的步骤，优选其中飞灰已被处理去除碳，特别是增加结晶相的量。

25. 发明授权

US06699446B2 Methods for separation of titanium from ore 有权
标题翻译：从矿石中分离钛的方法
公开(公告)号：US06699446B2
公开(公告)日：2004-03-02
申请号：US09769238
申请日：2001-01-25
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 to selectively remove iron values to provide high purity iron products. Titanium may be separated from raffinate as TiO2 or solvent extract and thermal stripping. TiO2 may also be separated in the initial leach solution. 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。渗滤液可以用不混溶的有机相进行萃取以选择性除去铁的值，以提供高纯铁产品。钛可以作为TiO 2或溶剂提取物和热剥离与萃余液分离。在初始浸出溶液中也可以分离TiO 2。优选地，卤化钛是四氯化钛。

26. 发明授权

US4358430A Process for treatment of selenium-bearing materials 失效
标题翻译：含硒材料的处理方法
公开(公告)号：US4358430A
公开(公告)日：1982-11-09
申请号：US311164
申请日：1981-10-14
申请人： Grigori S. Victorovich , Ramamritham Sridhar , Malcolm C. E. Bell
发明人： Grigori S. Victorovich , Ramamritham Sridhar , Malcolm C. E. Bell
IPC分类号： C01B19/00
CPC分类号： C01B19/001
摘要： Selenium-bearing materials are treated to convert selenium values to water-soluble form in a process which comprises producing a wet pellet product of uniform composition having a specified moisture content and size from an aqueous slurry containing the selenium-bearing material and dissolved sodium carbonate-containing reagent. In a preferred embodiment the slurry is pH-adjusted to neutralize free acid and/or to precipitate nonferrous base metals. spThis is a continuation of application Ser. No. 151,349 filed May 19, 1980, abandoned.
摘要翻译：处理含硒材料以将硒值转化为水溶性形式，其方法包括从含有含硒材料和溶解的碳酸钠的含水浆料制备具有特定水分含量和尺寸的均匀组成的湿颗粒产品，含有试剂。在优选的实施方案中，将浆液进行pH调节以中和游离酸和/或沉淀有色金属。

27. 发明授权

US4168967A Nickel and cobalt irregularly shaped granulates 失效
标题翻译：镍和钴不规则形状的颗粒
公开(公告)号：US4168967A
公开(公告)日：1979-09-25
申请号：US928773
申请日：1978-07-27
申请人： Ramamritham Sridhar , Warren L. Shellshear , Carlos A. Landolt , William Kantymir , Howard L. Schooley
发明人： Ramamritham Sridhar , Warren L. Shellshear , Carlos A. Landolt , William Kantymir , Howard L. Schooley
IPC分类号： B22F9/00 , B22F9/08 , C22C1/02 , C22C1/03 , C22C19/00 , C22C19/03 , C22F1/10 , B22D23/08
CPC分类号： C22C1/03 , B22F9/08 , Y10T428/29
摘要： A granulate consisting of smooth irregularly shaped granules is produced by preparing a molten bath of nickel and/or cobalt containing amounts of carbon and silicon which are correlated so that:8.03 C-4.42 C.sup.2 +7.23 Si>3.6pouring the molten alloy at a temperature 50.degree.-100.degree. C. above its liquidus temperature onto the surface of a pool of water which is agitated and maintained at 30.degree.-60.degree. C.
摘要翻译：由平滑的不规则形状的颗粒组成的颗粒通过制备相互关联的含有碳和硅的镍和/或钴的熔池而产生，使得：

28. 发明授权

US3938989A Arsenic removal from nickel matte 失效
标题翻译：从镍锍去除砷
公开(公告)号：US3938989A
公开(公告)日：1976-02-17
申请号：US482250
申请日：1974-06-24
申请人： Malcolm Charles Evert Bell , Ramamritham Sridhar
发明人： Malcolm Charles Evert Bell , Ramamritham Sridhar
IPC分类号： C22B23/02 , C22B23/00
CPC分类号： C22B23/025
摘要： Nickel matte containing at least about 28% sulfur is refined with respect to arsenic, antimony or bismuth by contacting molten matte with gaseous chlorine to chlorinate and volatilize arsenic, antimony or bismuth from the nickel matte. Advantageously, the molten nickel matte is provided with a halide flux to minimize volatilization of any nickel chloride that is formed.
摘要翻译：含有至少约28％硫的镍锍通过使熔融锍与气态氯接触来使砷，锑或铋从镍锍中分离和挥发而对砷，锑或铋进行精炼。有利地，熔融镍锍设置有卤化物助熔剂以最小化所形成的任何氯化镍的挥发。

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