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1.发明授权Electrolytic method for producing ammonium paratungstate from cemented tungsten carbide 失效从硬质合金碳化钨生产仲钨酸铵的电解方法
公开(公告)号：US5021133A
公开(公告)日：1991-06-04
申请号：US504480
申请日：1990-04-04
申请人： Clarence D. Vanderpool , Tai K. Kim
发明人： Clarence D. Vanderpool , Tai K. Kim
摘要： A method is disclosed for producing ammonium paratungstate from cemented tungsten carbide which comprises subjecting the cemented tungsten carbide to electrolysis by passing about 0.5 to about 20 volts through an ammoniacal solution selected from the group consisting of ammonium hydroxide-ammonium chloride solution, ammonium hydroxide-ammonium carbonate solution, and ammonium hydroxide-ammonium sulfate solution, wherein platinum and the cemented tungsten carbide serve as the anode and wherein the anode is immersed in the solution, to decompose the cemented tungsten carbide and form a solution of ammonium tungstate from which is crystallized ammonium paratungstate.
摘要翻译： 公开了一种用于从硬质合金碳化钨生产仲钨酸铵的方法，该方法包括使固结的碳化钨经过约0.5至约20伏的电解，通过选自氢氧化铵 - 氯化铵溶液，氢氧化铵 - 铵的氨溶液 碳酸盐溶液和氢氧化铵 - 硫酸铵溶液，其中铂和硬质合金碳化钨用作阳极，并且其中阳极浸入溶液中，以分解粘结碳化钨并形成钨酸铵溶液，其中结晶的铵 副州
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2.发明授权
公开(公告)号：US4741886A
公开(公告)日：1988-05-03
申请号：US922651
申请日：1986-10-24
IPC分类号： C01G41/00
CPC分类号： C01G41/00
摘要： A process is disclosed for recovering tungsten from tungsten bearing material containing arsenic. The process involves adjusting a water slurry of the material to a pH of less than about 4 with an acid to solubilize the major portion of the tungsten, adding an insoluble ferric compound to the slurry to form a two phase system in which the solid phase contains the major portion of the arsenic and of any phosphorus which may be present, and a solution phase containing the major portion of the tungsten. After separation of the solid from the solution, the solution is adjusted to a pH of less than about 2 with an acid and a suffficient amount of hexamethylenetetramine is added to the solution to precipitate the major portion of the tungsten, followed by separating the precipitate from the resulting liquor. The solid phase containing the arsenic and phosphorus, if any, can be contacted with water and a soluble ferric salt to produce a treated solid which passes the EP toxicity test.
摘要翻译： 公开了从含有砷的含钨材料中回收钨的方法。 该方法包括用酸调节材料的水浆至小于约4的pH，以溶解钨的主要部分，向浆料中加入不溶性三价铁化合物以形成其中固相含有 砷的主要部分和可能存在的任何磷，以及含有主要部分钨的溶液相。 在从溶液中分离固体后，用酸将溶液调节至小于约2的pH，并向溶液中加入少量的六亚甲基四胺以沉淀出主要部分的钨，然后将沉淀物从 所得酒。 含有砷和磷的固相（如果有的话）可以与水和可溶性铁盐接触，以产生通过EP毒性试验的处理固体。
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公开(公告)号：US4469505A
公开(公告)日：1984-09-04
申请号：US208369
申请日：1980-11-19
CPC分类号： G11B5/70621 , B22F9/22
摘要： In a process for producing fine cobalt metal powder by reduction of a cobalt hydroxide precipitate, the cobalt hydroxide precipitate is heat treated prior to reduction at a selected temperature for reducing the Fisher Sub Sieve Size of the finally produced cobalt metal powder.
摘要翻译： 在通过还原氢氧化钴沉淀物制造细钴金属粉末的方法中，在选择温度下还原之前，将氢氧化钴沉淀物进行热处理，以降低最终生产的钴金属粉末的Fisher Sub Sieve Size。
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公开(公告)号：US4432950A
公开(公告)日：1984-02-21
申请号：US419094
申请日：1982-09-16
CPC分类号： C22B34/00 , C22B34/36 , C22B7/007 , Y02P10/234
摘要： In a process for recovering refractory metal values from a refractory metal carbide cemented with a metal binder. The coated cemented carbide is treated with sulfuric acid to deteriorate the coating.
摘要翻译： 在用金属粘合剂粘结的难熔金属碳化物中回收难熔金属值的方法。 涂覆的硬质合金用硫酸处理以使涂层劣化。
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公开(公告)号：US4283257A
公开(公告)日：1981-08-11
申请号：US157571
申请日：1980-06-09
IPC分类号： C25B1/00
CPC分类号： C25B1/00
摘要： In a process for producing ammonium metatungstate from ammonium paratungstate, ammonium paratungstate is introduced in the anode chamber of an electrolytic cell which is separated from the cathode chamber by an inert liquid permeable media, when a direct electric current is passed through the cell, ammonium ions migrate to the cathode compartment resulting in an increased concentration of metatungstate in the anode chamber.
摘要翻译： 在仲钨酸铵生产偏钨酸铵的方法中，仲钨酸铵被引入电解池的阳极室中，当电流通过电池时，铵离子与惰性液体渗透介质从阴极室分离出来 迁移到阴极室，导致阳极室中偏钨酸盐的浓度增加。
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公开(公告)号：US5009788A
公开(公告)日：1991-04-23
申请号：US504478
申请日：1990-04-04
申请人： Tai K. Kim , Clarence D. Vanderpool
发明人： Tai K. Kim , Clarence D. Vanderpool
摘要： A method is disclosed for removing organic and tungsten from sodium sulfate solutions to render the solutions suitable for ion membrane processing, which comprises contacting the solution wherein the pH of the solution is no greater than about 7, with activated carbon to remove essentially all of the organic and the tungsten therefrom and form a purified sodium sulfate solution.
摘要翻译： 公开了一种从硫酸钠溶液中除去有机和钨的方法，以使溶液适用于离子膜处理，其包括将溶液的pH不大于约7的溶液与活性炭接触以除去基本上所有的 有机物和钨，形成纯化的硫酸钠溶液。
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7.发明授权
公开(公告)号：US4718996A
公开(公告)日：1988-01-12
申请号：US903804
申请日：1986-09-04
CPC分类号： C25C5/02 , C01F17/0006 , C01G45/02 , C22B3/0068 , C22B3/08 , C22B34/36 , C22B47/00 , C22B59/00 , C01P2006/80 , Y02P10/234
摘要： A process is disclosed for recovering tungsten, scandium, iron, and manganese from tungsten bearing material. The process involves digesting the material in sufficient sulfuric acid at a sufficient temperature for a sufficient time in the presence of a reducing agent to form a digestion solution containing the major portion of the scandium, iron, and manganese, and a digestion residue containing the major portion of the tungsten, separating the digestion solution from the digestion residue and extracting essentially all of the scandium from the solution with an organic consisting essentially of an extracting agent which is a dialkyl phosphoric acid which is present in an amount sufficient to extract essentially all of the scandium without extracting appreciable amounts of iron and manganese, and the balance an essentially aromatic solvent. The scandium containing organic is removed from the raffinate and stripped of the scandium with an aqueous ammonium carbonate solution which is separated from the stripped organic. The pH of the raffinate is adjusted to at least about 2 with a base and electrolyzed to remove the major portion of the iron as iron powder, which is separated from the resulting electrolyzed solution which contains the major portion of the manganese.
摘要翻译： 公开了从含钨材料中回收钨，钪，铁和锰的方法。 该方法包括在足够的温度下在足够的温度下将物质在还原剂存在下消化足够的时间以形成含有主要部分钪，铁和锰的消化溶液，以及含有主要部分的消化残余物 将消解溶液与消化残余物分离，并用基本上由萃取剂组成的有机物萃取基本上所有的钪，所述萃取剂是二烷基磷酸，其存在量足以提取基本上所有的 钪没有提取可观量的铁和锰，余量基本上是芳族溶剂。 将含有有机物的钪从残液中除去，并用与汽提的有机物分离的碳酸铵水溶液汽提钪。 使用碱将萃余液的pH调节至至少约2，并进行电解以除去作为铁粉末的铁的主要部分，其与含有主要部分锰的所得电解溶液分离。
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8.发明授权
公开(公告)号：US4624703A
公开(公告)日：1986-11-25
申请号：US821932
申请日：1986-01-24
IPC分类号： C01F17/00 , C01G45/02 , C22B3/08 , C22B3/38 , C22B34/36 , C22B47/00 , C22B59/00 , C25C5/02 , C22B3/00
CPC分类号： C01F17/0006 , C01G45/02 , C22B3/0068 , C22B3/08 , C22B34/36 , C22B47/00 , C22B59/00 , C25C5/02 , C01P2006/80 , Y02P10/234
摘要： A process is disclosed for recovering tungsten, scandium, iron, and manganese from tungsten bearing material. The process involves digesting the material in sufficient sulfuric acid at a sufficient temperature for a sufficient time in the presence of a reducing agent to form a digestion solution containing the major portion of the scandium, iron, and manganese, and a digestion residue containing the major portion of the tungsten, separating the digestion solution from the digestion residue and extracting essentially all of the scandium from the solution with an organic consisting essentially of an extracting agent which is a dialkyl phosphoric acid which is present in an amount sufficient to extract essentially all of the scandium without extracting appreciable amounts of iron and manganese, and the balance an essentially aromatic solvent. The scandium containing organic is removed from the raffinate and stripped of the scandium with an aqueous ammonium carbonate solution which is separated from the stripped organic. The pH of the raffinate is adjusted to at least about 2 with a base and electrolyzed to remove the major portion of the iron as iron powder, which is separated from the resulting electrolyzed solution which contains the major portion of the manganese.
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公开(公告)号：US4608235A
公开(公告)日：1986-08-26
申请号：US714329
申请日：1985-03-21
CPC分类号： C01G51/04 , C01G53/04 , C22B23/02 , C22B7/001 , Y02P10/214 , Y10S423/12
摘要： A process is disclosed for recovering cobalt from an alloy containing other metals as chromium, tungsten, etc. The process involves first adding the alloy to fused sodium hydroxide at a temperature of from about 750.degree. C. to about 1000.degree. C. to form a reaction mixture, the amount of sodium hydroxide being sufficient to subsequently form sodium salts which are essentially those of chromium and tungsten and hydroxides which are essentially those of cobalt and nickel. The reaction mixture is then heated at a sufficient temperature for a sufficient time while introducing an oxidizing gas into the reaction mixture to form a melt which consists essentially of the sodium salts and the hydroxides, followed by cooling the melt. The cooled melt is then contacted with sufficient water to form a solution containing the major portion of the sodium salts and a solid containing the major portion of the hydroxides, followed by separating the solid from the solution. The solid is then washed with sufficient water to remove the remaining portion of the sodium salts and other water soluble impurities and then separated from the resulting wash water.
摘要翻译： 公开了从含有其它金属如铬，钨等的合金中回收钴的方法。该方法首先在约750℃至约1000℃的温度下将合金加入熔融氢氧化钠中以形成 反应混合物，氢氧化钠的量足以随后形成基本上是铬和钨的钠盐，基本上是钴和镍的氢氧化物。 然后将反应混合物在足够的温度下加热足够的时间，同时将氧化气体引入反应混合物中以形成基本上由钠盐和氢氧化物组成的熔体，随后冷却熔体。 然后将冷却的熔体与足够的水接触以形成含有主要部分钠盐的溶液和含有主要部分氢氧化物的固体，然后将固体与溶液分离。 然后将固体用足够的水洗涤以除去剩余部分的钠盐和其它水溶性杂质，然后从得到的洗涤水中分离。
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公开(公告)号：US4454098A
公开(公告)日：1984-06-12
申请号：US556765
申请日：1983-12-01
CPC分类号： C22B34/36 , C01G28/023 , C01G41/00 , C22B7/008 , Y02P10/234
摘要： A process is disclosed wherein tungsten is recovered from hazardous waste material containing said tungsten, arsenic, and other impurities which can consist of magnesium, phosphorus, and silicon and the resulting waste is treated to render it nonhazardous according to EPA standards for arsenic. Said process involves digesting said hazardous waste material in an aqueous solution of an alkali metal hydroxide, adjusting the pH of the resulting solution to about 11.0 to about 13.0 with NaOH to precipitate essentially all of the magnesium and silicon species, filtering the digestion mix to remove the solids from said resulting solution which contains about 80 to about 100% of said tungsten and essentially none of said magnesium and said silicon, slurrying the hazardous solids in hot water, and adding to the slurry a ferric salt solution to precipitate ferric hydroxide, filtering this mixture to give a solid which passes the EPA standard test for solids with respect to arsenic.
摘要翻译： 公开了一种方法，其中钨从含有所述钨，砷和其它可由镁，磷和硅组成的杂质的有害废物中回收，并且根据EPA的砷标准对所得的废物进行处理以使其非危险。 所述方法包括在碱金属氢氧化物的水溶液中消化所述有害废物，用NaOH将所得溶液的pH调节至约11.0至约13.0，以沉淀基本上所有的镁和硅物质，过滤消化混合物以除去 来自所述所得溶液的固体含有约80至约100％的所述钨，基本上不含所述镁和所述硅，将有害固体在热水中制浆，并向浆料中加入铁盐溶液以沉淀氢氧化铁，过滤 该混合物得到固体，其通过关于砷的固体的EPA标准测试。
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