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1. 发明授权

US4610721A Two-stage leaching process for steel plant dusts 失效
标题翻译：钢厂粉尘二期浸出工艺
公开(公告)号：US4610721A
公开(公告)日：1986-09-09
申请号：US696980
申请日：1985-01-31
申请人： Willem P. C. Duyvesteyn , Mahesh C. Jha
发明人： Willem P. C. Duyvesteyn , Mahesh C. Jha
IPC分类号： C22B7/02 , C22B3/00
CPC分类号： C22B7/02 , C22B19/22 , C22B19/26 , Y02P10/234 , Y10S75/961
摘要： A process is provided for selectively recovering zinc from steel plant dust containing substantial amounts of iron. The process comprises atmospherically leaching the steel plant dust in a first stage wherein an amount of steel plant dust is mixed with an amount of acidic zinc sulfate solution to leach zinc therefrom, the leaching of the dust being such that the solution is controlled to a terminal pH ranging from about 2 to 3.5 and preferably from about 2.5 to 3.5, thereby limiting iron dissolution. The mixture is then subjected to a crude liquid/solid separation step whereby a thickened pulp is produced containing zinc and iron values and a separated liquid containing low iron and substantial amounts of zinc, the solution being sent to zinc recovery. Following separation, the thickened pulp, together with additional sulfuric acid or spent electrolyte, is subjected to high pressure leaching at a temperature at least sufficient to leach the remaining zinc values and provide an acid zinc sulfate solution thereof, while converting hydrated iron oxides into free settling hematite residue, the amount of additional sulfuric acid added to said thickened pulp being sufficient to obtain near quantitative dissolution of zinc without excessive iron dissolution.
摘要翻译：提供了一种从含有大量铁的钢厂粉尘中选择性回收锌的方法。该方法包括在第一阶段大气浸出钢厂粉尘，其中将一定量的钢厂粉尘与一定量的酸性硫酸锌溶液混合以从其中浸出锌，将粉尘的浸出使得溶液被控制到终端 pH范围为约2至3.5，优选约2.5至3.5，从而限制铁的溶解。然后将混合物进行粗液/固分离步骤，由此产生含有锌和铁值的增稠纸浆和含有低铁和大量锌的分离液体，将溶液送至锌回收。分离后，将增稠的纸浆与另外的硫酸或废电解液一起在至少足以浸出剩余锌值的温度下进行高压浸出，并提供其酸性硫酸锌溶液，同时将水合氧化铁转化为游离的沉淀赤铁矿残渣，添加到所述增稠纸浆中的额外硫酸的量足以获得锌的近似定量溶解而不过量铁溶解。

2. 发明授权

US4572771A Zinc recovery from steel plant dusts and other zinciferous materials 失效
标题翻译：钢铁回收锌粉和其他含锌材料
公开(公告)号：US4572771A
公开(公告)日：1986-02-25
申请号：US696979
申请日：1985-01-31
申请人： Willem P. C. Duyvesteyn , Mahesh C. Jha
发明人： Willem P. C. Duyvesteyn , Mahesh C. Jha
IPC分类号： C01G9/00 , C22B3/38 , C22B7/00 , C22B7/02 , C22B19/30 , C25B1/22
CPC分类号： C22B19/30 , C01G9/003 , C22B3/0063 , C22B7/007 , C22B7/02 , Y02P10/234
摘要： A process is provided for recovering zinc from zinc residues containing iron, and lead. The residue is leached with hydrochloric acid to provide a pregnant liquor containing zinc, iron, and lead. The iron is selectively removed from the pregnant liquor and the zinc extracted from the liquor by an organic solvent extraction system. The zinc is subsequently stripped from the organic solvent using water or hydrochloric acid to provide a zinc chloride solution which is then fed to an electrowinning cell for the production of marketable electrolytic zinc.
摘要翻译：提供了从含有铁和铅的锌残余物中回收锌的方法。残余物用盐酸浸提以提供含有锌，铁和铅的怀孕液体。选择性地从怀疑液中除去铁，并通过有机溶剂萃取系统从液体中提取锌。随后使用水或盐酸从有机溶剂中除去锌，得到氯化锌溶液，然后将其加入到电解沉积池中以生产可销售的电解锌。

3. 发明授权

US4614543A Mixed lixiviant for separate recovery of zinc and lead from iron-containing waste materials 失效
标题翻译：混合浸出物，用于从含铁废料中分离回收锌和铅
公开(公告)号：US4614543A
公开(公告)日：1986-09-30
申请号：US696978
申请日：1985-01-31
申请人： Willem P. C. Duyvesteyn , Mahesh C. Jha
发明人： Willem P. C. Duyvesteyn , Mahesh C. Jha
IPC分类号： C22B3/00 , C22B3/06 , C22B7/02 , C22B26/20
CPC分类号： C22B19/22 , C22B13/04 , C22B17/04 , C22B19/26 , C22B26/20 , C22B3/06 , C22B7/02 , Y02P10/234 , Y02P10/236 , Y10S75/961
摘要： A process is disclosed for the hydrometallurgical treatment of finely divided iron-containing steel plant dusts containing zinc, lead and such other metal values as calcium, manganese, silicon, magnesium, aluminum, cadmium, copper, and the like. The process is carried out by forming an aqueous slurry of the flue dust with a mixed lixiviant comprising HCl and H.sub.2 SO.sub.4, the amount of sulfate ion concentration being in excess of the chloride ion concentration and in stoichiometric excess of that required to sulfate substantially all of the lead and calcium present. The amount of chloride ion present as HCl should be sufficient to maintain the pH at about 1 to 4. The leaching is conducted at a temperature ranging from ambient to below the boiling point for a time at least sufficient to effect dissolution of at least zinc and other metal values and form a residue containing iron oxide, calcium sulfate and lead sulfate.
摘要翻译：公开了用于湿法冶金处理包含锌，铅和诸如钙，锰，硅，镁，铝，镉，铜等的其它金属值的细碎的含铁钢厂的方法。该方法通过用包含HCl和H 2 SO 4的混合浸渍剂形成烟道灰尘的含水浆料来进行，硫酸根离子浓度超过氯离子浓度并且化学计量过量，基本上全部为硫酸根离子浓度铅和钙存在。作为HCl存在的氯离子的量应足以将pH保持在约1至4。浸出在室温至低于沸点的温度下进行至少足以实现至少锌的溶解和其他金属值，形成含有氧化铁，硫酸钙和硫酸铅的残渣。

4. 发明授权

US5232679A Process for production of value-added coproducts from coal and other carbonaceous materials 失效
标题翻译：从煤和其他碳质材料生产增值副产品的方法
公开(公告)号：US5232679A
公开(公告)日：1993-08-03
申请号：US354606
申请日：1989-05-22
申请人： Mahesh C. Jha , Paul W. Woessner
发明人： Mahesh C. Jha , Paul W. Woessner
IPC分类号： C01B31/00 , C09C1/48
CPC分类号： C09C1/48 , C01B31/00
摘要： Coal is heated between about 95.degree. and 250.degree. C. to evaporate moisture, but not volatile hydrocarbons. The dried coal is heated to a temperature between about 400.degree. and 700.degree. C. to recover volatile hydrocarbons and to form char, the char is treated with hydrogen at a temperature between about 700.degree. and 1000.degree. C. to form methane, and the methane is decomposed to form pure carbon and hydrogen, which is recycled to treat the char.
摘要翻译：将煤在约95℃和250℃之间加热以蒸发水分，而不是挥发性烃。将干燥的煤加热至约400℃至700℃的温度以回收挥发性烃并形成焦炭，该焦炭在约700℃至1000℃的温度下用氢气处理以形成甲烷，甲烷被分解形成纯碳和氢，再循环以处理炭。

5. 发明授权

US4110400A Selective precipitation of nickel and cobalt sulfides from acidic sulfate solution 失效
标题翻译：从酸性硫酸盐溶液中选择性沉淀镍和硫化钴
公开(公告)号：US4110400A
公开(公告)日：1978-08-29
申请号：US820595
申请日：1977-08-01
申请人： Mahesh C. Jha , Gordon R. Wicker , Gustavo A. Meyer
发明人： Mahesh C. Jha , Gordon R. Wicker , Gustavo A. Meyer
IPC分类号： C22B23/00 , A01N57/20 , C01G51/00 , C01G53/00 , C01G53/11
CPC分类号： C01G53/11 , C22B23/0461
摘要： A method for efficiently precipitating nickel sulfide from an acidic nickel sulfate solution having a pH between 1.5 and 4, containing about 1 to 40 gpl nickel, optionally containing cobalt, and containing sufficient inert soluble sulfate salt to buffer the solution during the precipitation of nickel sulfide at relatively low temperature and pressure.
摘要翻译：一种有效沉淀镍酸盐溶液的方法，其pH值介于1.5和4之间，含有约1至40 gpl镍，任选含有钴，并含有足够的惰性可溶性硫酸盐，以在硫化镍沉淀过程中缓冲该溶液在相对较低的温度和压力下。

6. 发明授权

US06190625B1 Fluidized-bed roasting of molybdenite concentrates 失效
标题翻译：辉钼矿精矿的流化床焙烧
公开(公告)号：US06190625B1
公开(公告)日：2001-02-20
申请号：US08907373
申请日：1997-08-07
申请人： Mahesh C. Jha , William A. May
发明人： Mahesh C. Jha , William A. May
IPC分类号： C01G3902
CPC分类号： C22B1/10 , B01J8/1836 , B01J8/34 , B01J8/36 , B01J8/40 , B01J2208/00132 , B01J2208/00141 , B01J2208/00168 , B01J2208/00176 , B01J2219/1946 , C01G39/02 , C22B34/34
摘要： The present invention provides a method for fluidized bed roasting of molybdenite to molybdenum trioxide. A fluid bed reactor separated into separate zones is used to provide plug flow conditions. A cooling tube is submerged in the fluid bed to control temperature. A vibrator is used to enhance fluidization.
摘要翻译：本发明提供了一种将辉钼矿流化床焙烧成三氧化钼的方法。使用分离成分离区的流化床反应器来提供活塞流动条件。将冷却管浸没在流化床中以控制温度。振动器用于增强流化。

7. 发明授权

US4497779A Production of potassium hexafluotitanates using dilute hydrofluoric acid 失效
标题翻译：使用稀氢氟酸生产六氟硼酸钾
公开(公告)号：US4497779A
公开(公告)日：1985-02-05
申请号：US541830
申请日：1983-10-14
申请人： Marcy J. Kramer , William C. Warneke , Gustavo A. Meyer , Mahesh C. Jha
发明人： Marcy J. Kramer , William C. Warneke , Gustavo A. Meyer , Mahesh C. Jha
IPC分类号： C01G23/00 , C01G23/02
CPC分类号： C01G23/002 , C01P2004/51 , C01P2006/80
摘要： A process is provided for recovering fluorine from dilute hydrofluoric acid solutions, such as waste scrubber solution obtained in the treatment of phosphates. The dilute solution is used to react with oxidic titanium material to solubilize the contained titanium and subsequently form, in the presence of potassium ions, crystals of K.sub.2 TiF.sub.6 which are commercially useful as a grain-refining agent in the manufacture of aluminum alloys.
摘要翻译：提供了从稀氢氟酸溶液中回收氟的方法，例如在磷酸盐处理中获得的废物洗涤器溶液。稀释溶液用于与氧化钛材料反应以溶解所含的钛，随后在钾离子存在下，在制造铝合金时可商购用作晶粒细化剂的K 2 TiF 6晶体形成。

8. 发明授权

US4374101A Chemical dissolution of scale formed during pressure leaching of nickeliferous oxide and silicate ores 失效
标题翻译：在含氧氧化物和硅酸盐矿石的压力浸出过程中形成的氧化皮的化学溶解
公开(公告)号：US4374101A
公开(公告)日：1983-02-15
申请号：US390441
申请日：1982-06-21
申请人： Guy W. Lussiez , Mahesh C. Jha
发明人： Guy W. Lussiez , Mahesh C. Jha
IPC分类号： C01F7/26 , C01G53/00 , C22B23/00 , C23G1/02 , C23F14/02
CPC分类号： C22B23/043 , C01F7/26 , C23G1/02
摘要： In the high-pressure sulfuric acid leaching of nickeliferous oxide and silicate ore, there is a tendency for the formation of scale on autoclave surfaces. The scale comprises oxides and sulfates of metals selected from the group consisting of aluminum, iron, silicon and magnesium. The scale is chemically removed by flushing the autoclave following completion of a leaching regime with a sulfuric acid solution containing about 20 to 100 gpl H.sub.2 SO.sub.4 at a temperature of about 150.degree. C. to 250.degree. C. and a pressure ranging from about 54 psig to 562 psig for a time sufficient to effect substantial removal of the scale.
摘要翻译：在含镍氧化物和硅酸盐矿石的高压硫酸浸出中，存在在高压釜表面上形成结垢的倾向。比例尺包括选自铝，铁，硅和镁的金属的氧化物和硫酸盐。在约150℃至250℃的温度和约54psig至约50psig的压力下，在含有约20至100gp1 H 2 SO 4的硫酸溶液完成浸出方案后，通过冲洗高压釜来化学除垢。 562磅/平方英寸，足以实现大规模的除垢。

9. 发明授权

US5187141A Process for the manufacture of activated carbon from coal by mild gasification and hydrogenation 失效
标题翻译：通过温和气化和氢化从煤制造活性炭的方法
公开(公告)号：US5187141A
公开(公告)日：1993-02-16
申请号：US571794
申请日：1990-08-24
申请人： Mahesh C. Jha , Robert L. McCormick
发明人： Mahesh C. Jha , Robert L. McCormick
IPC分类号： C01B32/336
CPC分类号： C01B31/10
摘要： A process is provided for forming activated carbon from coal in the particulate state. The coal is first dried at a temperature sufficiently high to effect removal of moisture therefrom but below the temperature at which contained volatile matter vaporizes. The dried coal is then heated to an elevated temperature in a substantially non-oxidizing atmosphere at substantially atmospheric pressure sufficient to volatilize and remove the contained volatile matter and produce a char thereof and the char thereafter subjected to hydrogenation at an elevated temperature and pressure for a time sufficient to form activated carbon characterized by a BET surface area of at least about 200 m.sup.2 /g and an iodine number of at least about 400.
摘要翻译：提供了一种从颗粒状态的煤中形成活性炭的方法。煤首先在足够高的温度下干燥以从其中除去水分，但低于含挥发物蒸发的温度。然后将干燥的煤在基本上非氧化性气氛中在基本上非氧化性气氛中加热至足以挥发和除去所含挥发性物质并产生其焦炭，然后在升高的温度和压力下对其进行氢化，时间足以形成特征为BET表面积至少为约200m 2 / g，碘值为至少约400的活性炭。

10. 发明授权

US4775106A Use of smelter-grade sulfuric acid as true heavy-liquid media in coal cleaning 失效
标题翻译：冶炼级硫酸作为真正的重液体介质在煤炭清洗中的应用
公开(公告)号：US4775106A
公开(公告)日：1988-10-04
申请号：US101457
申请日：1987-09-28
申请人： Mahesh C. Jha , Deepak Malhotra , Frank J. Smit
发明人： Mahesh C. Jha , Deepak Malhotra , Frank J. Smit
IPC分类号： B03B5/44 , B03B9/00 , B02C23/20
CPC分类号： B03B9/005 , B03B5/442
摘要： A method is provided for removing contaminating minerals from coal by true heavy-liquid media. The coal is comminuted to liberate a substantial portion of the minerals from the coal, the method comprising forming a slurry of the comminuted coal in a solution of smelter-grade sulfuric acid of specific gravity ranging from about 1.2 to 1.7, the specific gravity of the sulfuric acid solution selected being greater than that for the liberated coal but less than that of the contaminating mineral to be separated, thereby effecting substantial separation between the liberated coal and the contained minerals. The coal is removed from the solution and then washed to remove occluded acid therefrom.
摘要翻译：提供了一种通过真正的重液体介质从煤中去除污染矿物的方法。煤被粉碎以从煤中释放出相当大部分的矿物质，该方法包括在约1.2至1.7的比重范围内的熔炼级硫酸溶液中形成粉碎的浆料，其比重选择的硫酸溶液大于释放的煤的硫酸溶液，但是比待分离的污染矿物的硫酸溶液大，从而在释放的煤和所含的矿物之间实质上分离。将煤从溶液中除去，然后洗涤以从其中除去封闭的酸。

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