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    • 5. 发明授权
    • Production of ammonium tetrathiomolybdate
    • 四硫代钼酸铵的生产
    • US4604278A
    • 1986-08-05
    • US734985
    • 1985-05-17
    • Kenneth T. ReillyRobin W. MunnHenry E. HoffmanAlan D. Douglas
    • Kenneth T. ReillyRobin W. MunnHenry E. HoffmanAlan D. Douglas
    • C01G39/00C01G39/06
    • C01G39/006C01G39/06
    • A process is disclosed for producing ammonium tetrathiomolybdate. The process involves reacting an ammoniacal molybdate solution with hydrogen sulfide gas, the solution and the gas being in a closed system and the flow of the gas being regulated at an elevated pressure to form a slurry consisting essentially of a solid essentially all of which is ammonium tetrathiomolybdate containing a portion of the starting molybdenum and a mother liquor containing the balance of the molybdenum. The slurry is then cooled to ambient temperature and the solid is removed from the major portion of the mother liquor. The solid is then washed with water and with alcohol followed by removal of the resulting respective water and alcohol washes to remove the remaining portion of the mother liquor and soluble impurities from the solid. The resulting washed solid is then dried at ambient temperature to form the final ammonium tetrathiomolybdate.
    • 公开了用于生产四硫代钼酸铵的方法。 该方法包括使氨基钼酸盐溶液与硫化氢气体反应,溶液和气体处于封闭系统中,并且气体的流动在升高的压力下调节以形成基本上由固体组成的浆料,其基本上全部为铵 含有起始钼的一部分的四硫钼酸盐和含有余量的钼的母液。 然后将浆液冷却至环境温度,并将固体从母液的主要部分除去。 然后将固体用水和醇洗涤,然后除去所得的各自的水和醇洗涤剂以从固体中除去母液的剩余部分和可溶性杂质。 然后将所得洗涤的固体在环境温度下干燥以形成最终的四硫代钼酸铵。
    • 6. 发明授权
    • Recovery of tungsten and rhenium
    • 回收钨和铼
    • US4584185A
    • 1986-04-22
    • US768252
    • 1985-08-22
    • Alan D. DouglasKenneth T. Reilly
    • Alan D. DouglasKenneth T. Reilly
    • C01G41/02C01G47/00C22B34/36C22B61/00C01G41/00
    • C01G47/00C01G41/02C22B34/36C22B61/00
    • A process is disclosed for recovering tungsten and rhenium from a tungsten and rhenium bearing solution. The process involves adding sufficient hydrochloric acid to the solution to form a first precipitate containing essentially all of the tungsten and a first mother liquor having an acid concentration of at least about 1.25 normal, and containing the major portion the rhenium, followed by separating the first precipitate from the first mother liquor. A source of sulfide ions is then added to the first mother liquor with agitation for a sufficient time and with the amount of sulfide ions being sufficient to form a second precipitate containing essentially all of the rhenium which was in the first mother liquor, and a second mother liquor, followed by separation of the second precipitate from the second mother liquor.
    • 公开了从钨和铼轴承溶液中回收钨和铼的方法。 该方法包括向溶液中加入足够的盐酸以形成含有基本上所有钨的第一沉淀物和含有至少约1.25正常酸浓度的第一母液,并且含有主要部分的铼,然后分离出第一 从第一母液中沉淀出来。 然后将硫化物离子源搅拌加入到第一母液中足够的时间,并且硫化物离子的量足以形成含有基本上所有在第一母液中的铼的第二沉淀物,第二次 母液,然后从第二母液中分离出第二沉淀物。
    • 9. 发明授权
    • Recovery of tungsten and rhenium
    • 回收钨和铼
    • US4599222A
    • 1986-07-08
    • US728649
    • 1985-04-29
    • Alan D. DouglasMartin B. MacInnisKenneth T. Reilly
    • Alan D. DouglasMartin B. MacInnisKenneth T. Reilly
    • C01G41/00C01G47/00C22B3/36C22B34/36C22B61/00
    • C01G47/003C01G41/003C22B3/0036C22B34/36C22B61/00Y02P10/234
    • A process is disclosed for recovering tungsten and rhenium from a relatively impure tungsten and rhenium solution. The process involves adjusting the pH of the solution to from about 9.0 to about 10.0 to precipitate impurities, and removing the impurities. The purified solution is adjusted to a pH of from about 0.5 to about 7.0 with a mineral acid. To the purified solution is added a solution containing sufficient hexamine to subsequently form a first hexamine tungsten solid containing the major portion of the tungsten. The hexamine solution is at essentially at the same pH as that of the pH adjusted purified solution. The resulting hexamine-tungsten-rhenium mixture is agitated at a sufficiently low temperature for a sufficient time to form the first solid and a first mother liquor containing the major portion of the rhenium. The first solid is separated from the first mother liquor.A process is disclosed for accomplishing the above in which a relatively impure tungsten and rhenium solution is purified as above. A hexamine solution which is not pH adjusted is added to the purified solution followed by adjustment of the pH of the resulting hexamine-tungsten-rhenium mixture to about 0.5 to about 7.0 as described above to form a first solid containing the major portion of the tungsten and a first mother liquor containing the major portion of the rhenium, followed by removal of the first solid from the first mother liquor.
    • 公开了从相对不纯的钨和铼溶液中回收钨和铼的方法。 该方法包括将溶液的pH调节至约9.0至约10.0以沉淀杂质并除去杂质。 将纯化的溶液用无机酸调节至约0.5至约7.0的pH。 向纯化的溶液中加入含有足够六胺的溶液,随后形成含有主要部分钨的第一六胺钨固体。 六聚氰胺溶液基本上处于与pH调节的纯化溶液相同的pH。 将所得的六胺 - 铼 - 铼混合物在足够低的温度下搅拌足够的时间以形成第一固体和含有主要部分铼的第一母液。 第一种固体与第一种母液分离。 公开了一种完成上述方法,其中如上所述纯化相对不纯的钨和铼溶液。 将未调节的六胺溶液加入到纯化溶液中,然后如上所述将所得六胺 - 钨 - 铼混合物的pH调节至约0.5至约7.0,以形成含有主要部分钨的第一固体 和含有铼的主要部分的第一母液,然后从第一母液中除去第一固体。
    • 10. 发明授权
    • Method for converting cobalt to cobalt metal powder
    • 将钴转化为钴金属粉末的方法
    • US4816069A
    • 1989-03-28
    • US197560
    • 1988-05-23
    • Alan D. DouglasMartin B. MacInnisClarence D. Vanderpool
    • Alan D. DouglasMartin B. MacInnisClarence D. Vanderpool
    • B22F9/02B22F9/04C22C1/04B02C19/12
    • C22C1/0433B22F9/02B22F9/04
    • 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.
    • 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。