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156 条记录 (耗时 0.016 秒)

    Solvent extraction process
    91.
    发明授权
    Solvent extraction process 失效
    溶剂萃取工艺

    公开(公告)号：US4961856A

    公开(公告)日：1990-10-09

    申请号：US316064

    申请日：1989-02-27

    申请人： Raymond F. Dalton ,  Arthur Burgess

    发明人： Raymond F. Dalton ,  Arthur Burgess

    IPC分类号： B01D11/04 ,  C01G55/00 ,  C22B3/36 ,  C22B11/00

    CPC分类号： C01G55/001 ,  C22B3/0036 ,  Y02P10/234

    摘要： An aqueous solution containing palladium is contacted with a solution of a heterocyclic ring compound having at least one ring substituent of the type --COX, which is, or contains, a hydrocarbyl group having at least 5 carbon atoms. The heterocyclic ring compound may be a pyridine mono-, di- or tri-carboxylic acid ester, for example the bis-isodecyl ester of pyridine- 3,5-dicarboxylic acid. Other heterocyclic ring compounds include those having a pyrimidine, pyrazine, pyridazine, 1,2,4-triazole or imidazole ring. Palladium is extracted into the water-immiscible solution while other metals, particularly platinum group metals, remain in the aqueous solution. The palladium can be stripped from the water-immiscible solution for example using a dilute aqueous solution of ammonia.

    Process for the isolation of noble metals
    92.
    发明授权
    Process for the isolation of noble metals 失效
    贵金属分离方法

    公开(公告)号：US4925485A

    公开(公告)日：1990-05-15

    申请号：US686421

    申请日：1984-12-26

    申请人： Reinhold Schulze

    发明人： Reinhold Schulze

    IPC分类号： C22B11/00 ,  C01G5/00 ,  C01G7/00 ,  C01G55/00 ,  C22B3/16

    CPC分类号： C01G5/003 ,  C01G55/001 ,  C01G7/003 ,  C22B3/1616 ,  C22B3/24 ,  C22B3/42 ,  Y02P10/234

    摘要： The present invention involves the isolation or leaching of noble metals from materials containing noble metals, e.g. ores, by treating the noble metal- containing materials with a cyclic thiourea derivative under acid pH conditions. Removal is effected by adsorption onto charcoal or by an ion exchanger, for example. Preferred cyclic thioureas are N,N'-ethylenethiourea and N,N'-propylenethiourea and the acid pH conditions may be achieved by sulfuric acid or hydrochloric acid solutions containing 0.01 to 2.0% by weight of the cyclic thiourea.

    摘要翻译： 本发明涉及从含贵金属的材料中分离或浸出贵金属，例如， 通过在酸性pH条件下用环状硫脲衍生物处理含贵金属的物质。 例如，通过吸附到木炭上或通过离子交换器进行去除。 优选的环状硫脲是N，N'-亚乙基硫脲和N，N'-丙基硫脲，酸性pH条件可以通过含有0.01至2.0重量％的环硫脲的硫酸或盐酸溶液来实现。

    Process for the extraction of precious metals from solutions thereof
    97.
    发明授权
    Process for the extraction of precious metals from solutions thereof 失效
    从其溶液中萃取贵金属的方法

    公开(公告)号：US4390366A

    公开(公告)日：1983-06-28

    申请号：US298355

    申请日：1981-09-01

    申请人： Richard K. Lea ,  Julian D. Edwards ,  D. Frederick Colton

    发明人： Richard K. Lea ,  Julian D. Edwards ,  D. Frederick Colton

    IPC分类号： C22B11/00 ,  B01D11/04 ,  C01G1/00 ,  C01G7/00 ,  C01G55/00 ,  C22B3/00 ,  C22B3/20 ,  C22B3/26 ,  C22B3/32 ,  C22B3/34 ,  C22B3/38

    CPC分类号： C22B3/0031 ,  C01G55/00 ,  C01G55/001 ,  C01G7/003 ,  C22B11/04 ,  C22B3/0009 ,  C22B3/0018 ,  C22B3/0021 ,  C22B3/0024 ,  C22B3/0068 ,  Y02P10/234

    摘要： A process for sequentially and selectively separating gold and platinum group metals from aqueous solutions containing them is disclosed.First, ruthenium and osmium are oxidized to their tetroxides and then removed from the solution. Then, gold is removed by solvent extraction preferably with dibutyl carbitol. Next, palladium and platinum are removed by solvent extraction with an alkyl sulphide and tributyl phosphate respectively, care being taken to reduce iridium in solution before platinum extraction to prevent it extracting with the platinum. Then the iridium is reoxidized and removed from solution. Finally, rhodium is removed from the solution.Using this process gold, platinum and palladium of saleable purity can be extracted directly without the need for further refining steps.

    摘要翻译： 公开了从含有它们的水溶液中顺次和选择性地分离金和铂族金属的方法。 首先，将钌和锇氧化成四氧化物，然后从溶液中除去。 然后，通过溶剂萃取优选用二丁基卡必醇除去金。 接下来，通过用烷基硫化物和磷酸三丁酯分别溶剂萃取除去钯和铂，在铂提取之前，注意减少溶液中的铱，以防止其用铂提取。 然后将铱再次氧化并从溶液中除去。 最后，从溶液中除去铑。 使用这种方法，可以直接提取金，铂和钯的可销售纯度，而不需要进一步的精炼步骤。

    Process for the separation of platinum group metals
    98.
    发明授权
    Process for the separation of platinum group metals 失效
    铂族金属分离方法

    公开(公告)号：US4107261A

    公开(公告)日：1978-08-15

    申请号：US750738

    申请日：1976-12-15

    申请人： John Baltz ,  Enzo Coltrinari

    发明人： John Baltz ,  Enzo Coltrinari

    IPC分类号： C01G55/00 ,  C22B3/28

    CPC分类号： C22B3/0016 ,  C01G55/001 ,  Y02P10/234

    摘要： Disclosed herein is a process for the separation and recovery of Rhodium values from aqueous mineral acid solutions also containing Iridium and/or Ruthenium which comprises contacting the metal bearing aqueous solution with a water immiscible organic solvent containing an organically substituted quaternary amine salt to extract Iridium and Ruthenium into the solvent phase leaving Rhodium in the aqueous raffinate. The loaded organic phase is stripped of Iridium and Ruthenium in two sequential steps by contacting it first with an alkaline solution then redissolving the resulting precipitate in an acidified reducing solution.

    摘要翻译： 本文公开了一种用于从含有铱和/或钌的含水无机酸溶液中分离和回收铑值的方法，该方法包括使含有金属的水溶液与含有机取代的季胺盐的水不混溶的有机溶剂接触以提取铱和 钌进入溶剂相，离开铑在含水萃余液中。 通过使其与碱性溶液接触，然后将所得沉淀物重新溶解在酸化的还原溶液中，将负载的有机相以两个顺序的步骤汽提铱和钌。

    Process for the separation of platinum group metals
    99.
    发明授权
    Process for the separation of platinum group metals 失效
    铂族金属分离方法

    公开(公告)号：US4012481A

    公开(公告)日：1977-03-15

    申请号：US629879

    申请日：1975-11-07

    申请人： John Baltz ,  Enzo Coltrinari

    发明人： John Baltz ,  Enzo Coltrinari

    IPC分类号： C01G55/00 ,  C22B3/28

    CPC分类号： C22B3/0016 ,  C01G55/001 ,  Y02P10/234

    摘要： Disclosed herein is a process for the separation and recovery of Rhodium values from aqueous mineral acid solutions also containing Iridium and/or Ruthenium which comprises contacting the metal bearing aqueous solution with a water immiscible organic solvent containing an organically substituted quaternary amine salt to extract Iridium and Ruthenium into the solvent phase leaving Rhodium in the aqueous raffinate. The loaded organic phase is stripped of Iridium and Ruthenium in two sequential steps by contacting it first with an alkaline solution then redissolving the resulting precipitate in an acidified reducing solution.

    摘要翻译： 本文公开了一种用于从含有铱和/或钌的含水无机酸溶液中分离和回收铑值的方法，该方法包括使含有金属的水溶液与含有机取代的季胺盐的水不混溶的有机溶剂接触以提取铱和 钌进入溶剂相，离开铑在含水萃余液中。 通过使其与碱性溶液接触，然后将所得沉淀物重新溶解在酸化的还原溶液中，将负载的有机相以两个顺序的步骤汽提铱和钌。

    Separation of platinum group metals and gold
    100.
    发明授权
    Separation of platinum group metals and gold 失效
    分离铂族金属和金

    公开(公告)号：US3985552A

    公开(公告)日：1976-10-12

    申请号：US600940

    申请日：1975-08-01

    申请人： Roderick Ivan Edwards

    发明人： Roderick Ivan Edwards

    IPC分类号： C22B11/00 ,  B01D11/04 ,  C01G7/00 ,  C01G55/00 ,  C22B3/00 ,  C22B3/26 ,  C22B3/34 ,  C22B11/04

    CPC分类号： C01G7/003 ,  B01D11/0492 ,  C01G55/001 ,  C22B3/0031 ,  Y02P10/234

    摘要： A method of separating gold from palladium or at least one of gold and palladium from solutions containing the chloride complexes of at least the relevant ones of these metals together with other platinum group metals and wherein base metals may be present in the solution said method comprising contacting the solution for a sufficient length of time to result in extracting of substantially all the required gold and for palladium values present therein, with a suitable quantity of a water insoluble non-volatile solvent extractant in an organic phase and having functional groups of the formula R.sup.1 --S--R wherein R.sup.1 and R may be the same or different and have a carbon atom thereof joined directly to the sulphur atom; R.sup.1 and R being chosen so that neither of them have active functional groups capable of acting as ion exchangers or complexing groups and thereafter separating the two phases and recovering the extracted gold and palladium.

    摘要翻译： 从含有至少这些金属中的相关的金属的氯化物配合物的溶液与其它铂族金属一起分离金与钯或至少一种金和钯的方法，其中碱金属可以存在于溶液中，所述方法包括接触 该溶液足够长的时间以得到在有机相中合适量的水不溶性非挥发性溶剂萃取剂，并且具有式R 1的官能团，从而提取其中存在的基本上所有需要的金和钯值 -SR其中R 1和R 2可以相同或不同并且其碳原子直接连接到硫原子上; 选择R1和R，使得它们都不具有能够用作离子交换剂或络合基团的活性官能团，然后分离两相并回收提取的金和钯。