Solvent extraction process
    5.
    发明公开
    Solvent extraction process 失效
    Lösungsextraktionsverfahren。

    公开(公告)号:EP0332314A2

    公开(公告)日:1989-09-13

    申请号:EP89301652.7

    申请日:1989-02-21

    IPC分类号: C22B3/00 C01G55/00

    摘要: An aqueous solution containing palladium is contacted with a solution of 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 hererocyclic 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 hererocyclic ring compounds include those having a pyrimidine, pyrazine, pyridazine, 1,2,4-triazole or imidazole ring. Palladium is extracted into the water-immiscible solution whilst 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.

    摘要翻译: 将含有钯的水溶液与具有-COX的至少一个环取代基的杂环化合物溶液接触,所述环取代基为或含有具有至少5个碳原子的烃基。 本环状环化合物可以是吡啶单 - ,二 - 或三 - 羧酸酯,例如吡啶-3,5-二羧酸的双异癸基酯。 其它本环化合物包括具有嘧啶,吡嗪,哒嗪,1,2,4-三唑或咪唑环的化合物。 将钯提取到与水不混溶的溶液中,而其它金属,特别是铂族金属则保留在水溶液中。 钯可以从不与水混溶的溶液中汽提,例如使用稀的氨水溶液。

    Solvent extraction process
    7.
    发明公开
    Solvent extraction process 失效
    溶剂萃取工艺溶剂萃取工艺

    公开(公告)号:EP0332314A3

    公开(公告)日:1990-02-07

    申请号:EP89301652.7

    申请日:1989-02-21

    IPC分类号: C22B3/00 C01G55/00

    摘要: An aqueous solution containing palladium is contacted with a solution of 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 hererocyclic 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 hererocyclic ring compounds include those having a pyrimidine, pyrazine, pyridazine, 1,2,4-triazole or imidazole ring. Palladium is extracted into the water-immiscible solution whilst 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.