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    • 33. 发明授权
    • Recovery of tungsten, scandium, iron, and manganese from tungsten
bearing material
    • 从钨轴承材料回收钨,钪,铁和锰
    • US4718995A
    • 1988-01-12
    • US903940
    • 1986-09-05
    • Clarence D. VanderpoolMartin B. MacInnisJudith A. Ladd
    • Clarence D. VanderpoolMartin B. MacInnisJudith A. Ladd
    • C01F17/00C01G45/12C22B3/08C22B3/28C22B34/36C22B47/00C22B59/00
    • C22B59/00C01F17/0006C01G45/1214C22B3/0012C22B3/08C22B34/36C22B47/00Y02P10/234
    • A process is disclosed for recovering scandium from a tungsten bearing material containing tungsten, iron manganese and scandium. The process involves digesting the material in an aqueous solution selected from the group consisting of a saturated solution of sulfur dioxide and a sulfuric acid solution containing an additional reducing agent at a sufficient temperature for a sufficient time to form a digestion solution containing the major portion of the scandium, iron, and manganese, and a digestion solid containing the major portion of the tungsten which is separated from the digestion solution. The major portion of the scandium is extracted from the digestion solution with an organic consisting essentially of an extracting agent which is essentially a mixture of alkyl primary amines which are present in an amount sufficient to extract the major portion of the scandium without extracting appreciable amounts of iron and manganese, and the balance an essentially aromatic solvent. After separation of the scandium containing organic from the raffinate, the organic is stripped of the scandium with hydrochloric acid which is then separated from the stripped organic. In an optional additional steps, iron is recovered by adjusting the pH of the raffinate to precipitate the major portion of the iron and manganese which is separated from the resulting liquor. A sufficient amount of chlorine gas is contacted with an aqueous slurry of the precipitate at a sufficient temperature for a sufficient time to form a manganese containing solution containing the major portion of the manganese which was in the precipitate and a solid containing the major portion of the iron which was in the precipitate.
    • 公开了从含有钨,铁锰和钪的含钨材料回收钪的方法。 该方法包括在足够温度下将选自二氧化硫饱和溶液和含有另外还原剂的硫酸溶液的水溶液中的材料消化足够的时间以形成含有主要部分的消化液 钪,铁和锰,以及含有与消解溶液分离的钨的主要部分的消解固体。 钪的主要部分从消解溶液中提取,其中有机物基本上由提取剂提取,所述萃取剂基本上是烷基伯胺的混合物,其以足以提取主要部分钪的量存在,而不提取可观量的 铁和锰,余量为基本芳香族溶剂。 从萃余液中分离含钪的有机物后,用盐酸汽提有机物,然后与汽提的有机物分离。 在可选的附加步骤中,通过调节萃余液的pH以回收从所得液体中分离的铁和锰的主要部分来回收铁。 在足够的温度下,将足够量的氯气与沉淀物的含水浆料接触足够的时间以形成含有主要部分在沉淀中的锰的含锰溶液和含有主要部分的固体 处于沉淀中的铁。
    • 34. 发明授权
    • Recovery of tungsten, scandium, iron, and manganese from tungsten
bearing material
    • 从钨轴承材料回收钨,钪,铁和锰
    • US4626280A
    • 1986-12-02
    • US838482
    • 1986-01-24
    • Clarence D. VanderpoolMartin B. MacInnisJudith A. Ladd
    • Clarence D. VanderpoolMartin B. MacInnisJudith A. Ladd
    • C01F17/00C01G45/12C22B3/08C22B3/28C22B34/36C22B47/00C22B59/00C22B3/00
    • C22B59/00C01F17/0006C01G45/1214C01G49/02C22B3/0012C22B3/08C22B34/36C22B47/00Y02P10/234
    • A process is disclosed for recovering tungsten, iron, and manganese from tungsten bearing material. The process involves digesting the material in a sulfur dioxide solution at a sufficient temperature for a sufficient time to form a digestion solution containing the major portion of the scandium, iron, and manganese, and a digestion solid containing the major portion of the tungsten which is separated from the digestion solution. The major portion of the scandium is extracted from the digestion solution with an organic consisting essentially of an extracting agent which is essentially a mixture of alkyl primary amines which are present in an amount sufficient to extract the major portion of the scandium without extracting appreciable amounts of iron and manganese, and the balance an essentially aromatic solvent. After separation of the scandium containing organic from the raffinate, the organic is stripped of the scandium with hydrochloric acid which is then separated from the stripped organic. The raffinate is adjusted to a pH of at least about 3.5 with a base to precipitate the major portion of the iron and manganese which is separated from the resulting liquor. A sufficient amount of chlorine gas is contacted with an aqueous slurry of the precipitate at a sufficient temperature for a sufficient time to form a manganese containing solution containing the major portion of the manganese which was in the precipitate and a solid containing the major portion of the iron which was in the precipitate.
    • 公开了从含钨材料中回收钨,铁和锰的方法。 该方法包括在足够的温度下将二氧化硫溶液中的材料消化足够的时间以形成含有主要部分钪,铁和锰的消解溶液,以及含有主要部分钨的消解固体, 与消化液分离。 钪的主要部分从消解溶液中提取,其中有机物基本上由提取剂提取,所述萃取剂基本上是烷基伯胺的混合物,其以足以提取主要部分钪的量存在,而不提取可观量的 铁和锰,余量为基本上为芳族溶剂。 从萃余液中分离含钪的有机物后,用盐酸汽提有机物,然后与汽提的有机物分离。 将萃余液用碱调节至至少约3.5的pH,以沉淀与所得液体分离的铁和锰的主要部分。 在足够的温度下,将足够量的氯气与沉淀物的含水浆料接触足够的时间以形成含有主要部分在沉淀中的锰的含锰溶液和含有主要部分的固体 处于沉淀中的铁。
    • 35. 发明授权
    • Method of producing crystalline ammonium metatungstate
    • 生产结晶态偏钨酸铵的方法
    • US4612183A
    • 1986-09-16
    • US704992
    • 1985-02-25
    • Tai K. KimCarl W. BoyerMartin B. MacInnisDonald H. Ennis
    • Tai K. KimCarl W. BoyerMartin B. MacInnisDonald H. Ennis
    • C01G41/00
    • C01G41/00
    • A method is disclosed for producing crystalline ammonium metatungstate from ammonium paratungstate. The method involves heating ammonium paratungstate in a multiple hearth furnace at from about 200.degree. C. to about 400.degree. C. to form a relatively uniformly heated ammonium paratungstate. A slurry of the heated ammonium paratungstate in water is then digested at from about 70.degree. C. to about 100.degree. C. for less than about 6 hours at relatively constant volume while maintaining the pH of the slurry at from about 4.2 to about 3.0 by the addition of ammonia as necessary to form a solution of ammonium metatungstate. The resulting ammonium metatungstate solution is then evaporated to a fraction of its original volume to concentrate it and any insolubles are removed. The ammonium metatungstate is then crystallized from the concentrated solution.
    • 公开了一种从仲钨酸铵生产结晶态偏钨酸铵的方法。 该方法包括在约200℃至约400℃的多床炉中加热仲钨酸铵,形成相对均匀加热的仲钨酸铵。 然后将加热的仲钨酸铵的浆液在约70℃至约100℃下以相对恒定的体积消化少于约6小时,同时通过以下方式将浆料的pH维持在约4.2至约3.0,通过 根据需要添加氨以形成偏钨酸铵溶液。 然后将所得的偏钨酸铵溶液蒸发至其原始体积的一部分以使其浓缩并除去任何不溶物。 然后从浓缩溶液中结晶偏钨酸铵。