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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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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：US4624844A
公开(公告)日：1986-11-25
申请号：US697662
申请日：1985-02-04
IPC分类号： C01G41/00
CPC分类号： C01G41/00
摘要： A process is disclosed for producing ammonium paratungstate which involves adding hexamethylenetetramine to a first solution of ammonium tungstate, adjusting the pH to about 2 with an acid to form a precipitate which contains the major portion of the tungsten and the hexamethylenetetramine and separating the precipitate from the resulting mother liquor. The tungsten hexamethylenetetramine precipitate is then dissolved in aqueous ammonia to form a second ammonium tungstate solution which is then heated at from about 90.degree. C. to about 100.degree. C. to form a precipitate essentially all of which is ammonium paratungstate and a mother liquor which contains essentially all of the hexamethylenetetramine. The ammonium paratungstate precipitate is then separated from the mother liquor.
摘要翻译： 公开了一种用于生产仲钨酸铵的方法，其涉及将六亚甲基四胺加入到钨酸铵的第一溶液中，用酸将pH调节至约2以形成含有主要部分的钨和六亚甲基四胺的沉淀物，并将沉淀物与 产生母液。 然后将六亚甲基四胺钨沉淀物溶解在氨水中形成第二钨酸铵溶液，然后将其加热至约90℃至约100℃，以形成基本上全部为仲钨酸铵的母液和母液， 含有基本上所有的六亚甲基四胺。 然后将仲钨酸铵沉淀物与母液分离。
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公开(公告)号：US4608084A
公开(公告)日：1986-08-26
申请号：US718257
申请日：1985-04-01
CPC分类号： C22B23/0484 , C22B23/0423 , C22B3/0025 , C22B34/32 , C22B7/007 , Y02P10/234
摘要： A process is disclosed for recovering cobalt and chromium from a cobalt and chromium containing alloy. The process involves first digesting the alloy in concentrated hydrochloric acid at a sufficient temperature for a sufficient time to form a first solution containing the major portion of the cobalt, chromium, and any iron and nickel present in the alloy and a first solid and separating the first solution from the first solid. Oxalic acid is then added to the first solution in an amount sufficient to subsequently precipitate the major portion of the cobalt and any iron and nickel contained in the first solution followed by adjustment of the ph to from about 1 to about 2 with a base and maintaining the temperature below about 20.degree. for a sufficient time to form a second solid containing the major portion of the cobalt and the major portion of any iron and nickel which is present in the first solution and a second solution containing the major portion of the chromium which is present in the first solution and separation of the second solid from the second solution. The second solid is then washed with sufficient water to remove any water soluble impurities and separated from the resulting wash water. The resulting washed second solid is then contacted with a calcium chloride solution of sufficient calcium chloride concentration, at a sufficient temperature, for a sufficient time to form a third solution containing the major portion of the cobalt which was present in the second solid, and a third solid. The third solution is then separated from the third solid.
摘要翻译： 公开了从含钴和铬的合金中回收钴和铬的方法。 该方法包括首先在足够的温度下将浓缩的合金中的合金消化足够的时间以形成含有合金中存在的钴，铬和任何铁和镍的主要部分的第一溶液和第一固体， 从第一个固体的第一个解决方案。 然后将草酸以足以随后沉淀出主要部分的钴和第一溶液中所含的任何铁和镍的量，然后用碱将ph调节至约1至约2，并保持 温度低于约20°足够的时间以形成第二固体，其含有钴的主要部分和存在于第一溶液中的任何铁和镍的主要部分和含有主要部分铬的第二溶液， 存在于第一溶液中并且将第二固体与第二溶液分离。 然后用足够的水洗涤第二固体以除去任何水溶性杂质并从得到的洗涤水中分离。 然后将所得洗涤后的第二固体在足够的温度下与足够氯化钙浓度的氯化钙溶液接触足够的时间以形成含有存在于第二固体中的钴的主要部分的第三溶液， 第三个固体。 然后将第三溶液与第三固体分离。
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公开(公告)号：US4606885A
公开(公告)日：1986-08-19
申请号：US746702
申请日：1985-06-20
CPC分类号： B22F3/12 , C22C1/0433
摘要： An improvement is disclosed in a process for recovery of cobalt from cobalt bearing material to obtain fine cobalt metal powder of high purity, the improvement being mechanically compacting the powder into a billet and sintering the billet in a hydrogen atmosphere at a sufficient temperature for a sufficient time to densify the billet and form a high purity cobalt article having an oxygen content of no greater than about 500 weight parts per million.
摘要翻译： 在从含钴材料回收钴的方法中公开了一种改进以获得高纯度的细钴金属粉末，其改进是将粉末机械压实成坯料，并在氢气气氛中在足够的温度下烧结坯料足够的 使坯料致密化并形成氧含量不超过约500重量份百万分率的高纯度钴制品的时间。
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公开(公告)号：US4448755A
公开(公告)日：1984-05-15
申请号：US557021
申请日：1983-12-01
申请人： Richard A. Scheithauer , Michael J. Miller , Martin B. MacInnis , James N. Christini , Martin C. Vogt
发明人： Richard A. Scheithauer , Michael J. Miller , Martin B. MacInnis , James N. Christini , Martin C. Vogt
摘要： In a process for producing pure ammonium paratungstate from ammonium tungstate solutions containing tin, sulfide is added to the ammonium tungstate solution in an amount sufficient to form a soluble complex of the sulfide with the tin. The solution is then evaporated to a volume at which essentially all of the tungsten is in the form of insoluble ammonium paratungstate and essentially all of the tin is in the mother liquor in the form of a soluble complex along with other impurities. The solid ammonium paratungstate is then separated from the mother liquor by filtration.
摘要翻译： 在从含有锡的钨酸铵溶液中生产纯仲钨酸铵的方法中，将硫化铵以足以形成硫化物与锡的可溶性络合物的量加入到钨酸铵溶液中。 然后将溶液蒸发至其中基本上所有的钨都是不对称的仲钨酸铵形式的体积，并且基本上所有的锡在母液中是可溶性络合物的形式以及其它杂质。 然后将过硫酸固体铵与母液分离。
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7.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：US4379126A
公开(公告)日：1983-04-05
申请号：US292376
申请日：1981-08-13
CPC分类号： C22B3/0012 , C01G41/003 , C22B3/24 , Y02P10/234 , Y10S423/14
摘要： In a continuous process for producing ammonium tungstate from aqueous alkali metal tungstate solution according to an extraction process, the loaded organic extractant is cleaned after stripping by contacting with activated carbon for improving phase separation and decreasing the concentration of alkali metal.
摘要翻译： 在根据提取方法从碱金属钨酸盐水溶液中生产钨酸铵的连续方法中，通过与活性炭接触来提纯负载的有机萃取剂，以提高相分离和降低碱金属的浓度。
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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：US4261959A
公开(公告)日：1981-04-14
申请号：US105003
申请日：1979-12-18
申请人： Tai K. Kim , Martin B. MacInnis
发明人： Tai K. Kim , Martin B. MacInnis
CPC分类号： C01G49/0009 , C22B3/0021 , Y02P10/234
摘要： Ferric iron is removed from an aqueous chloride solution containing other cations by extracting ferric iron with a liquid organic extractant comprising a ketone having less than about eight carbon atoms for a sufficient period of time to extract ferric iron into the organic liquid extractant. The organic liquid extractant is separated from the aqueous chloride solution containing other cations and the ferric iron is stripped from the organic liquid.
摘要翻译： 通过用含有少于约8个碳原子的酮的液体有机萃取剂萃取三价铁足够长的时间将三价铁萃取到有机液体萃取剂中，从含有其它阳离子的氯化水溶液中除去三价铁。 将有机液体萃取剂与含有其它阳离子的氯化水溶液分离，并从有机液体中汽提出三价铁。
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