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公开(公告)号：US3947332A
公开(公告)日：1976-03-30
申请号：US477257
申请日：1974-06-07
CPC分类号： C25B1/22 , C01G39/003 , C01G39/006 , C01G41/00 , C01P2006/40 , C01P2006/80
摘要： Heteropoly acids of tungsten and molybdenum, such as tungstosilicic acid and molybdosilicic acid, are produced by first preparing an aqueous solution of an alkali metal tungstate or molybdate and an alkali metal salt of the hetero atom, and then removing the alkali metal cations from the solution by means of a cation exchange membrane under the influence of an applied electrical potential, whereby the reactive tungstate or molybdate and hetero species anions react to form the desired heteropoly acid.
摘要翻译： 通过首先制备碱金属钨酸盐或钼酸盐的水溶液和杂原子的碱金属盐，然后从溶液中除去碱金属阳离子来制备钨和钼如钨硅酸和钼硅酸的杂多酸 在施加的电势的影响下通过阳离子交换膜，由此反应性钨酸盐或钼酸盐和杂种阴离子反应形成所需的杂多酸。
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2.发明授权
公开(公告)号：US3936362A
公开(公告)日：1976-02-03
申请号：US477921
申请日：1974-06-10
摘要： Ammonium tungstate, ammonium paratungstate, ammonium metatungstate or hydrated tungsten trioxide is produced by passing tungstate anions through an anion exchange membrane into an aqueous solution containing ammonium cations under the driving force of an electrical potential for a time sufficient to achieve a pH within the range in which the desired tungsten compound will form.
摘要翻译： 钨酸铵，仲钨酸铵，偏钨酸铵或水合三氧化钨是通过使钨酸阴离子在电势的驱动力下通过阴离子交换膜进入含有铵阳离子的水溶液达一定时间的时间产生的， 这将形成所需的钨化合物。
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3.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：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：US4816069A
公开(公告)日：1989-03-28
申请号：US197560
申请日：1988-05-23
CPC分类号： C22C1/0433 , B22F9/02 , B22F9/04
摘要： A method for converting cobalt to cobalt powder is disclosed which comprises heating a starting mixture of cobalt and zinc in a non-reacting atomosphere at a first temperature of below the boiling point of zinc up to about 900.degree. C. in a non-reacting atmosphere for a length of time sufficient to cause the alloying of a portion of the zinc and cobalt, with the weight ratio of zinc to cobalt being less than about 10. The temperature of the resulting partially alloyed mixture is slowly raised to a second temperature of from about 900.degree. C. to about 960.degree. and is maintained for a time sufficient only to form a reaction product in which essentially all of the cobalt is alloyed with zinc and to keep the evaporation of zinc to a minimum. The reaction product is then heated at a pressure below atmospheric pressure at a third temperature of no greater than about 950.degree. C. for a time sufficient to evaporate essentially all of the zinc and produce a cobalt ingot which is pulverizable when cooled to room temperature.
摘要翻译： 公开了一种将钴转化为钴粉末的方法，该方法包括在非反应性气氛中，在低于沸点至少约900℃的第一温度下，在非反应性大气中加热钴和锌的起始混合物 一段时间足以引起一部分锌和钴的合金化，锌与钴的重量比小于约10.所得到的部分合金化混合物的温度缓慢升至第二温度 约900℃至约960℃，并保持足以仅形成反应产物的时间，其中基本上所有的钴与锌合金化并使锌的蒸发保持最小。 然后将反应产物在不大于约950℃的第三温度下在低于大气压的压力下加热足以蒸发基本上所有锌的时间，并产生当冷却至室温时可粉化的钴锭。
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6.发明授权
公开(公告)号：US4808384A
公开(公告)日：1989-02-28
申请号：US145634
申请日：1987-12-21
CPC分类号： C22B34/36 , C01F17/0006 , C22B3/0012 , C22B3/0068 , C22B3/08 , C22B47/00 , C22B59/00 , Y02P10/234
摘要： A process is disclosed for recovering tungsten, iron, and manganese from tungsten bearing material. The process involves digesting the material in a sufficient amount of sulfuric acid at a temperature of at least about 80.degree. C. for a sufficient time in the presence of coal as 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, followed by separating the solution from the residue. The major portion of the scandium can be extracted from the digestion solution with an organic solution consisting essentially of a mixture of tertiary alkyl primary amines which are present in an amount sufficient to extract the major portion of the scandium, and the balance an essentially aromatic solvent. The scandium is stripped from the organic with hydrochloric acid which is then separated from the stripped organic. The extraction can be accomplished by an organic solution consisting essentially of an extracting agent which is a dialkyl phosphoric acid and an essentially aromatic solvent. In this latter case, the stripping agent for the scandium is an aqueous solution of ammonium carbonate.
摘要翻译： 公开了从含钨材料中回收钨，铁和锰的方法。 该方法包括在煤作为还原剂存在下，在至少约80℃的温度下将足量硫酸材料消化足够的时间以形成含有主要部分钪的消解溶液， 铁和锰以及含有主要部分钨的消化残渣，然后从残余物中分离溶液。 钪的主要部分可以从消解溶液中提取，其中有机溶液基本上由叔烷基伯胺的混合物组成，叔烷基伯胺以足以提取主要部分钪的量存在，余量为基本上为芳族溶剂 。 用盐酸从有机物中除去钪，然后与汽提的有机物分离。 提取可以通过主要由作为二烷基磷酸和基本上芳香族溶剂的萃取剂组成的有机溶液来完成。 在后一种情况下，用于钪的汽提剂是碳酸铵的水溶液。
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公开(公告)号：US4626425A
公开(公告)日：1986-12-02
申请号：US704840
申请日：1985-02-25
CPC分类号： C22B3/0012 , C01G41/003 , C22B34/36 , Y02P10/234
摘要： A method is disclosed for recovering tungsten from a relatively dilute ammoniacal tungsten solution. The method involves adding hexamethylenetetramine to the tungsten solution in an amount sufficient to form a hexamethylenetetramine complex then adjusting the pH to from about 1.0 to about 2.0 with a mineral acid to form a precipitate of the complex containing at least about 99% of the tungsten, and separating the precipitate from the resulting mother liquor.
摘要翻译： 公开了从相对稀释的氨质钨溶液中回收钨的方法。 该方法包括以足以形成六亚甲基四胺复合物的量向钨溶液中加入六亚甲基四胺，然后用无机酸将pH调节至约1.0至约2.0，以形成含有至少约99％的钨的络合物的沉淀物， 并从所得母液中分离出沉淀物。
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公开(公告)号：US4599224A
公开(公告)日：1986-07-08
申请号：US768376
申请日：1985-08-22
CPC分类号： C01G39/00 , C01G39/003 , C01G39/02 , C22B3/0012 , C22B34/34 , C01P2006/80 , Y02P10/234
摘要： A process is disclosed for recovering molybdenum from molybdenum disulfide. The process involves forming a slurry of the molybdenum disulfide in a solution of an alkali metal hydroxide, the amount of hydroxide being sufficient to react with at least a portion of the molybdenum disulfide to form an alkali metal molybdate and an alkali sulfate, heating the slurry in an oxidizing atmosphere at an elevated temperature and pressure and for a sufficient time to effect the conversion to the molybdate, and separating the pregnant liquor containing the molybdate from any residue. To the pregnant liquor is then added a sufficient amount of a hexamine to form a hexamine-molybdenum compound containing the major portion of the molybdenum, followed by adjusting the pH to from about 1.5 to about 3.8 to precipitate the major portion of the hexamine-molybdenum compound, and separating the compound from the resulting mother liquor.
摘要翻译： 公开了从二硫化钼中回收钼的方法。 该方法包括在碱金属氢氧化物的溶液中形成二硫化钼的浆液，氢氧化物的量足以与至少一部分二硫化钼反应形成碱金属钼酸盐和碱金属硫酸盐，加热该浆料 在氧化气氛中在升高的温度和压力下进行足够的时间以转化成钼酸盐，并将含有钼酸盐的怀孕液与任何残留物分离。 然后向怀疑液中加入足量的六胺以形成含有主要部分钼的六胺钼化合物，然后将pH调节至约1.5至约3.8以使六胺 - 钼的主要部分沉淀 化合物，并从所得母液中分离化合物。
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公开(公告)号：US4409019A
公开(公告)日：1983-10-11
申请号：US448579
申请日：1982-12-10
CPC分类号： C22B23/0423 , B22F9/22
摘要： A fine cobalt metal powder is produced from pieces of relatively pure cobalt by dissolving the cobalt pieces in an aqueous solution of hydrogen iodide and iodine and forming a cobalt containing solid which is subsequently reduced to a fine cobalt metal powder.
摘要翻译： 通过将钴片溶解在碘化氢和碘的水溶液中并形成含钴固体，随后还原成细钴金属粉末，由相当纯的钴制成细钴金属粉末。
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公开(公告)号：US3947555A
公开(公告)日：1976-03-30
申请号：US408493
申请日：1973-10-23
IPC分类号： C01B32/949 , C01B31/34
CPC分类号： C01B31/34
摘要： A process suitable for recovering refractory metal carbide values from contaminated uncemented refractory metal carbides containing an iron group metal comprises heating an admixture of the powders of the contaminated refractory metal carbides and glacial acetic acid to the boiling point of the admixture for at least about 30 minutes, the weight of the powders divided by the weight of the acid is less than 5, thereafter removing the resulting carbide solids from the acid and washing the solids with sufficient water to remove the residual acid and drying the solids.
摘要翻译： 适用于从含有铁族金属的被污染的未熔化的难熔金属碳化物中回收难熔金属碳化物值的方法包括将被污染的难熔金属碳化物和冰醋酸的粉末的混合物加热到混合物的沸点至少约30分钟 ，粉末的重量除以酸的重量小于5，此后从酸中除去所得的碳化物固体，并用足够的水洗涤固体以除去残留的酸并干燥固体。
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