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100 条记录 (耗时 0.016 秒)

    Removal and recovery of silver from waste stream
    3.
    发明授权
    Removal and recovery of silver from waste stream 失效
    从废物流中除去和回收银

    公开(公告)号：US4744825A

    公开(公告)日：1988-05-17

    申请号：US937682

    申请日：1986-12-04

    申请人： Abraham S. C. Chen ,  Hubert L. Fleming

    发明人： Abraham S. C. Chen ,  Hubert L. Fleming

    IPC分类号： C01G5/00 ,  C22B11/00 ,  C22B11/04

    CPC分类号： C01G5/003 ,  C22B3/24 ,  Y02P10/234

    摘要： In accordance with the invention, an improved process is provided for the efficient removal and recovery of silver from an impure solution containing silver ions which comprises contacting the silver-containing solution with an activated alumina adsorbent to selectively adsorb the silver ions from the solution and the lower the subsequent effluent discharge to less than 1 ppm silver, treating the activated alumina with a regeneration fluid to recover the silver ions from the adsorbent, and reducing the recovered silver ions to metallic silver.

    摘要翻译： 根据本发明，提供了一种改进的方法，用于从含有银离子的不纯溶液中有效地除去和回收银，其包括使含银溶液与活性氧化铝吸附剂接触以选择性地从溶液中吸附银离子， 将随后的流出物排出量降低到小于1ppm的银，用再生流体处理活性氧化铝以从吸附剂中回收银离子，并将回收的银离子还原成金属银。

    Metal, particularly gold, recovery from adsorbed cyanide complexes
    6.
    发明授权
    Metal, particularly gold, recovery from adsorbed cyanide complexes 失效
    金属，特别是金，从吸附的氰化物络合物中回收

    公开(公告)号：US3970737A

    公开(公告)日：1976-07-20

    申请号：US518833

    申请日：1974-10-29

    申请人： Raymond John Davidson

    发明人： Raymond John Davidson

    IPC分类号： C22B11/08 ,  B01D15/00 ,  C01G5/00 ,  C01G7/00 ,  C01G55/00 ,  C22B3/24 ,  C22B15/00 ,  C22B23/00 ,  C01G3/00 ,  C01G53/00

    CPC分类号： C01G55/001 ,  B01D15/00 ,  C01G5/003 ,  C01G7/003 ,  C22B3/24 ,  Y02P10/234

    摘要： The invention provides a method of recovering transition or noble metal values, particularly gold and silver values, from a support having absorbed thereon the metal values in the form of an ionic complex, particularly a cyanide ionic complex, by desorbing the metal values with water of low cation concentration such as deionized or softened water. When the cation of the complex is an alkaline earth metal cation then the support is preferably subjected to a pre-treatment with an alkali metal salt solution to effect an exchange reaction before the desorption step.

    摘要翻译： 本发明提供了一种从其上吸收了离子络合物，特别是氰化物离子络合物形式的金属值的载体中回收过渡金属或贵金属值，特别是金和银值的方法，通过用水 低阳离子浓度，如去离子水或软化水。 当络合物的阳离子是碱土金属阳离子时，优选用碱金属盐溶液对载体进行预处理，以在解吸步骤之前进行交换反应。

    Noble metals solvation agents-hydroxyketones and iodine and iodide
    7.
    发明授权
    Noble metals solvation agents-hydroxyketones and iodine and iodide 失效
    NOBLE金属溶解剂 - 羟基酮和碘和碘

    公开(公告)号：US3826750A

    公开(公告)日：1974-07-30

    申请号：US29163672

    申请日：1972-09-25

    申请人： GOLDEN CYCLE CORP

    发明人： WILSON H

    IPC分类号： C01G5/00 ,  C22B3/26 ,  C22B11/00 ,  C22B11/06 ,  C22B11/04

    CPC分类号： C01G5/003 ,  C22B3/0032 ,  C22B11/04 ,  C22B11/06 ,  Y02P10/234

    摘要： PROCESSES FOR AND COMPOSITIONS UTILIZED IN THE RECOVERY OF NOBLE METALS FROM NOBLE METAL CONTAINING SUBSTANCES BY SUBJECTING SUCH SUBSTANCES-PREFERABLY IN COMMINUTED FORM-TO THE ACTION OF A SOLVENT PREFERABLY COMPRISING DIACETONE ALCOHOL AS A MAJOR COMPONENT, WATER, MINOR AMOUNTS OF GLACIAL ACETIC ACID, POTASSIUM IODIDE AND ELEMETAL IODINE. SOLVATION OF THE NOBLE METAL OCCURS DURING AGITATION AND HEATING OF THE SLURRY. THE NOBLE METAL CONTANTS ARE REMOVED FROM THE NOBLE METAL PREGNANT SOLUTION BY DISPLACEMENT ONTO A NON-NOBLE METAL SURFACE. THE SOLID NOBLE METAL CONTAINING RESIDUE IS TREATED WITH SUFFICIENT AQUEOUS HYDROXIDE SOLUTION TO CONVERT EXCESS NON-NOBLE METAL INTO ITS WATER-SOLUBLE SALT. THE REMAINING INSOLUBLE MATERIAL CONTAINING THE NOBLE METAL RECOVERED IS RINSED TO REMOVE ANY REMAINING UNREACTED ALKALI AND THE SOLUBLE SALTS AND IS THEN DIGESTED WITH CONCENTRATED SULFURIC ACID TO DISSOLVE ANY REMAINING ACID SOLUBLE IMPURITIES, THE REMAINING ACID INSOLUBLE RESIDUE IS RINSED, DRIED AND COMPRISES SUBSTANTIALLY PURE NOBLE METAL.