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42 条记录 (耗时 0.013 秒)

    Apparatus for removing selenium
    12.
    发明授权
    Apparatus for removing selenium 失效
    去除SELENIUM的设备

    公开(公告)号：US3743481A

    公开(公告)日：1973-07-03

    申请号：US3743481D

    申请日：1971-02-17

    申请人： NORANDA MINES LTD

    发明人： NAKANO U

    IPC分类号： C01B19/00 ,  B01J1/00

    CPC分类号： C01B19/004 ,  C01P2006/80 ,  Y02P20/129 ,  Y10S266/905

    摘要： IN AN OPERATION WHEREIN SELENIUM VALUES ARE RECOVERED FROM PELLETIZED SELEMIUM-CONTAINING MATERIALS INVOLVING HEATING PELLETIZED SELENIUM-CONTAINING MATERIALS IN THE PRESENCE OF AIR SO AS TO VOLATILIZE THE SELENIUM FROM SAID PELLETIZED SELENIUM-CONTAINING MATERIALS IN THE FORM OF SELENIUM DIOXIDE, IMPROVED RESULTS ARE OBTAINED BY EMPLOYING AN APPARATUS WHEREIN A MASS OF PELLETIZED SELENNIUM-CONTAINING MATERIAL IS MAINTAINED STATIC WITHIN A ROASTING ZONE AND PREHEATED AIR EMPLOYED TO HEAT THE MASS OF PELLETIZED SELENIUM-CONTAINING MATERIALS IS PASSED

    DOWNWARDLY THROUGH SAID MASS OF PELLETIZED SELENIUMCONTAINING MATERIALS MAINTAINED AT A TEMPERATURE OF ABOUT 1350*F. FOR A PERIOD OF TIME IN THE RANGE ABOUT 1-6 HOURS SUFFICIENT TO VOLATILIZE SUBSTANTIALLY ALL OF THE SELENIUM FROM SAID PELLETIZED SELENIUM-CONTAINING MATERIALS AND THEREUPON DISCHARGING THE RESULTING SUBSTANTIALLY DESELENIZED PELLETIZED MATERIAL FROM SAID ROASTING ZONE.

    Recovery of platinum group metals from nickel-copper-iron matte
    16.
    发明授权
    Recovery of platinum group metals from nickel-copper-iron matte 失效
    从镍铜 - 铁锍中回收铂族金属

    公开(公告)号：US4571262A

    公开(公告)日：1986-02-18

    申请号：US710738

    申请日：1985-03-11

    申请人： Derek G. E. Kerfoot ,  Russell P. Kofluk ,  Donald R. Weir

    发明人： Derek G. E. Kerfoot ,  Russell P. Kofluk ,  Donald R. Weir

    IPC分类号： C01B19/00 ,  C22B11/00 ,  C22B15/00 ,  C22B11/04 ,  C01G3/00 ,  C01G53/00

    CPC分类号： C01B19/004 ,  C01B19/007 ,  C01B19/008 ,  C22B11/04 ,  C22B15/0071 ,  C22B15/0089 ,  C22B23/043 ,  C01P2006/80 ,  Y02P10/236

    摘要： A process for separately recovering platinum group metal values, nickel values and copper from nickel-copper-iron sulphidic matte containing platinum group metals includes leaching ground matte at atmospheric pressure in acidic nickel-copper sulphate solution at a temperature in the range of from about 75.degree. to about 105.degree. C. and at a pH below about 4 initially under oxidizing conditions and subsequently under neutral or non-oxidizing conditions to cause dissolution of nickel and iron, precipitation of copper as a copper sulphide and precipitation of dissolved platinum group metals. The copper, nickel and platinum group metal containing solids are separated from the nickel and iron containing sulphate solution and are leached in acidic nickel-copper sulphate solution under pressurized oxidizing conditions at a temperature of from about 120.degree. to about 180.degree. C. to cause dissolution of nickel and copper with minor dissolution of platinum group metals. The platinum group metal containing solids are separated from the nickel and copper containing sulphate solution, and copper is electrowon from the nickel and copper containing sulphate solution under conditions to cause cathodic deposition of copper without significant deposition of nickel. Spent nickel and copper containing electrolyte solution which also contains minor amounts of dissolved platinum group metals is recycled to the atmospheric leach and pressure leaching steps.

    摘要翻译： 在含有铂族金属的镍 - 铜 - 铁硫化物锍中单独回收铂族金属值，镍值和铜的方法包括在大气压下在酸性硫酸镍 - 硫酸铜溶液中浸出磨碎的锍，温度范围为约75 温度至约105℃，pH低于约4，最初在氧化条件下，随后在中性或非氧化条件下引起镍和铁的溶解，铜作为硫化铜沉淀并沉淀溶解的铂族金属。 将含铜，镍和铂族金属的固体与含镍和铁的硫酸盐溶液分离，并在约120℃至约180℃的温度下在加压氧化条件下在酸性硫酸镍 - 硫酸盐溶液中浸出，导致 镍和铜的溶解与铂族金属的轻微溶解。 将含有铂族金属的固体与含有镍和铜的硫酸盐溶液分离，铜在含有镍和铜的硫酸盐溶液的电解下，在不会显着沉积镍的条件下引起铜的阴极沉积。 还含有少量溶解的铂族金属的含有镍和铜的电解质溶液被循环到大气浸出和压力浸出步骤中。

    Removal of selenium from urethane solutions
    17.
    发明授权
    Removal of selenium from urethane solutions 失效
    从聚氨酯溶液中去除硒

    公开(公告)号：US4130633A

    公开(公告)日：1978-12-19

    申请号：US864172

    申请日：1977-12-27

    申请人： Edward T. Shawl ,  Ming N. Sheng ,  John G. Zajacek

    发明人： Edward T. Shawl ,  Ming N. Sheng ,  John G. Zajacek

    IPC分类号： B01J27/30 ,  C01B19/00

    CPC分类号： C01B19/004 ,  B01J27/30 ,  C01B19/001 ,  Y02P20/584

    摘要： A method for the removal and recovery of selenium from a urethane solution containing selenium compounds, which may be in the form of inorganic selenium and/or organoselenium compounds, which comprises contacting the selenium-containing urethane solution at a suitable temperature with an aqueous hydrogen peroxide solution and recovering the selenium from the resulting selenium compound enriched aqueous phase in a form suitable for reuse in the preparation of urethanes, the deselenized urethane remaining in the hydrocarbon and/or organic phase.

    摘要翻译： 一种从含有硒化合物的氨基甲酸酯溶液中去除和回收硒的方法，其可以是无机硒和/或有机硒化合物的形式，其包括在合适的温度下将含硒氨基甲酸酯溶液与过氧化氢水溶液 溶液，并从所生成的硒化合物富集的水相中以适于在制备氨基甲酸酯中再利用的形式回收硒，该脱盐氨基甲酸酯保留在烃和/或有机相中。