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1.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：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：US4381937A
公开(公告)日：1983-05-03
申请号：US304400
申请日：1981-09-21
CPC分类号： C22B23/0423 , C01G51/12 , C22B23/0461 , Y02P10/212
摘要： In a process for producing fine cobalt metal powder from scrap material containing brazing compositions, the scrap is digested with hydrochloric acid to form a cobalt chloride solution which the silver is removed by precipitation with a suitable alkali metal halide at a pH of about 7 to result in a cobalt amine chloride solution which is further processed to fine cobalt powder.
摘要翻译： 在由含有钎焊组合物的废料制造精细钴金属粉末的方法中，废料用盐酸消化以形成氯化钴溶液，通过在约7的pH下用合适的碱金属卤化物沉淀除去银，得到 在钴胺氯化物溶液中，其进一步加工成细小的钴粉末。
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公开(公告)号：US4690710A
公开(公告)日：1987-09-01
申请号：US793079
申请日：1985-10-31
CPC分类号： B22F9/22 , C22B23/0423 , C22B23/0461
摘要： A process is disclosed for producing pure cobalt metal powder. The process involves contacting a cobaltous salt with a sufficient amount of an alkaline earth halide in an aqueous solution at a sufficient temperature for a sufficient time to form a solution which is essentially cobaltous halide and a solid which consists essentially of a salt of the alkaline earth and the anion of the cobaltous salt. The cobaltous halide solution is removed from the solid and the ions in the solution are complexed with ammonia in the presence of a catalyst to form a cobaltic hexammine ion. The resulting solution is treated with an acid in the presence of halide ions to form a cobaltic hexammine halide precipitate which is removed from the resulting mother liquor and dissolved in an aqueous solution to form a relatively pure solution which is treated with a sufficient amount of a metallic hydroxide to form a cobalt containing precipitate which is reduced to cobalt metal.
摘要翻译： 公开了用于生产纯钴金属粉末的方法。 该方法包括将钴盐与足量的碱土卤化物在水溶液中在足够的温度下接触足够的时间以形成基本上为卤化钴和基本上由碱土金属盐组成的固体的溶液 和钴耳盐的阴离子。 将卤化钴溶液从固体中除去，并且在催化剂存在下，溶液中的离子与氨络合以形成钴六胺离子。 所得溶液在卤离子存在下用酸处理以形成钴六卤化物沉淀物，其从所得母液中除去并溶解在水溶液中以形成相对纯的溶液，该溶液用足量的 金属氢氧化物以形成还原成钴金属的含钴沉淀物。
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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：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：US4612039A
公开(公告)日：1986-09-16
申请号：US793420
申请日：1985-10-31
CPC分类号： B22F9/22 , C01G51/04 , C01G51/12 , C01P2006/80
摘要： A method is disclosed for producing pure cobalt metal powder. The method involves reducing a cobalt containing source material to produce an intermediate cobalt metal, contacting this intermediate with an ammoniacal ammonium halide solution and a catalyst with oxidation to form a solution of hexamminecobalt(III) ions, removing insoluble material, and adding a sufficient amount of a halide salt to the solution to precipitate hexamminecobalt(III) halide which is separated from the mother liquor. The hexamminecobalt(III) halide precipitate is dissolved in water and the pH is adjusted to greater than about 10 with a base, while the solution is heated at a sufficient temperature for a sufficient time to form an insoluble cobalt oxide containing material which is separated from its mother liquor and reduced to pure cobalt metal powder.
摘要翻译： 公开了一种用于生产纯钴金属粉末的方法。 该方法包括还原含钴原料以产生中间体钴金属，使该中间体与氨基卤化铵溶液和催化剂氧化形成六氨基钴（III）离子溶液，除去不溶物质，并加入足量的 的卤化物盐溶解以沉淀与母液分离的六氰基钴（III）卤化物。 将六氰酸钴（III）沉淀物溶于水中，用碱将pH调节至大于约10℃，同时将溶液在足够的温度下加热足够的时间以形成不溶性的含氧化钴的材料， 其母液还原成纯钴金属粉末。
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