Method for extracting rhenium and tungsten from wastes of
rhenium-tungsten alloys
    41.
    发明授权
    Method for extracting rhenium and tungsten from wastes of rhenium-tungsten alloys 失效
    从铼钨合金废物中提取铼和钨的方法

    公开(公告)号:US4278641A

    公开(公告)日:1981-07-14

    申请号:US112451

    申请日:1980-01-16

    摘要: Rhenium and tungsten are recovered from a rhenium tungsten alloy by electrochemically dissolving the alloy in substantially 4 to 5 normal sodium hydroxide to form a rhenium-containing solution, solvent extracting the rhenium-containing solution with an organic heteroatom-containing solvent (e.g. pyridine) or acetone to form a second solution of the solvent containing rhenium, distilling the solvent from the second solution to form a raffinate containing rhenium, adding sulfuric acid to the raffinate to adjust the pH thereof to about 1, extracting tungsten from the raffinate with a solution of trioctylamine in kerosene containing octyl alcohol, and subjecting the raffinate containing sodium perrhenate to ion exchange to eventually convert it to ammonium perrhenate.

    摘要翻译: 通过将合金电化学溶解在基本上为4至5个正常氢氧化钠中的铼钨合金中回收铼和钨,以形成含铼溶液,用含有有机杂原子的溶剂(例如吡啶)萃取含铼溶液的溶剂或 丙酮以形成含有铼的溶剂的第二溶液,从第二溶液中蒸馏出溶剂以形成含铼的萃余液,向萃余液中加入硫酸将pH调节至约1,用萃取液中的溶液 含有辛醇的煤油中的三辛胺,并将含有高铼酸钠的残液进行离子交换,最终将其转化为高铼酸铵。

    Method For Recovery Of Palladium
    48.
    发明申请
    Method For Recovery Of Palladium 审中-公开
    钯的回收方法

    公开(公告)号:US20070202025A1

    公开(公告)日:2007-08-30

    申请号:US11578363

    申请日:2005-04-12

    IPC分类号: C07F15/00 C01G55/00

    摘要: Due to its ability to activate small molecules, palladium is increasingly used mainly in catalysis. For example in 2002 the world demand for Pd for the production of catalytic converters for motor vehicles was 64% of the total, equal to 3.08 million oz. Its high cost coupled with the environmental impact of disposal of these spent materials focuses attention on its quantitative recovery by means of economically advantageous industrial processes with low environmental impact. The present invention makes available a method which is easy to apply on an industrial scale for the recovery of palladium in one single step and in mild conditions that meets the above-mentioned industrial requirements. The method uses adducts of N,N′-dialkyl-perhydrodiazepine-2,3-dithione.

    摘要翻译: 由于其能够激活小分子,钯越来越多地主要用于催化。 例如在2002年,世界对汽车催化转化器生产的需求量为64%,相当于308万盎司。 其高成本加上​​处理这些废料的环境影响,通过经济上有利于低环境影响的工业过程,重点关注其定量回收。 本发明提供一种易于在工业规模上应用于在一个单一步骤中回收钯并且在满足上述工业要求的温和条件下的方法。 该方法使用N,N'-二烷基 - 全氢化二氮杂-2,3-二硫酮的加合物。

    Process for the selective extraction (III) actinides by means of amides
having a nitrogenous heterocyclic substituent
    49.
    发明授权
    Process for the selective extraction (III) actinides by means of amides having a nitrogenous heterocyclic substituent 失效
    通过具有含氮杂环取代基的酰胺选择性提取(III)锕系元素的方法

    公开(公告)号:US5510090A

    公开(公告)日:1996-04-23

    申请号:US94046

    申请日:1993-07-27

    摘要: The invention relates to a process for the selective extraction of (III) actinides by means of amides having a nitrogenous heterocyclic substituent of formula: ##STR1## in which R.sup.1 is an alkyl or alkoxy group or a hydrogen atom, R.sup.2 and R.sup.3, which can be the same or different, represent a hydrogen atom, an alkyl or an alkoxy group and R.sup.4 is a hydrogen atom or a group of formula: ##STR2## in which R.sup.5 and R.sup.6, which can be the same or different, represent a hydrogen atom or an alkyl or alkoxy group. This process makes it possible to separate (III) actinides from (III) lanthanides.

    摘要翻译: PCT No.PCT / FR92 / 01124 Sec。 371日期:1993年7月27日 102(e)日期1993年7月27日PCT提交1992年12月2日PCT公布。 公开号WO93 / 11113 日期:1993年6月5日本发明涉及通过具有下式的氮杂环取代基的酰胺选择性提取(III)锕系的方法:其中R 1 是烷基或烷氧基或氢原子,可以相同或不同的R 2和R 3表示氢原子,烷基或烷氧基,R 4是氢原子或式 其中R5和R6可以相同或不同,表示氢原子或烷基或烷氧基。 该方法使得(III)镧系元素分离(III)锕系元素成为可能。

    Separations of actinides, lanthanides and other metals
    50.
    发明授权
    Separations of actinides, lanthanides and other metals 失效
    锕系元素,镧系元素和其他金属的分离

    公开(公告)号:US5409678A

    公开(公告)日:1995-04-25

    申请号:US31053

    申请日:1993-03-11

    摘要: An organic extracting solution comprised of a bis(acylpyrazolone or a substituted bis(acylpyrazolone) and an extraction method useful for separating certain elements of the actinide series of the periodic table having a valence of four from one other, and also from one or more of the substances in a group consisting of hexavalent actinides, trivalent actinides, trivalent lanthanides, trivalent iron, trivalent aluminum, divalent metals, and monovalent metals and also from one or more of the substances in a group consisting of hexavalent actinides, trivalent actinides, trivalent lanthanides, trivalent iron, trivalent aluminum, divalent metals, and monovalent metals and also useful for separating hexavalent actinides from one or more of the substances in a group consisting of trivalent actinides, trivalent lanthanides, trivalent iron, trivalent aluminum, divalent metals, and monovalent metals.

    摘要翻译: 一种由双(酰基吡唑啉酮或取代的二(酰基吡唑啉酮)组成的有机萃取溶液和一种萃取方法,该萃取方法可用于从周期表中分离出四价四价锕系元素的某些元素, 由六价锕系元素,三价锕系元素,三价镧系元素,三价铁,三价铝,二价金属和一价金属组成的组中的物质,以及由六价锕系元素,三价锕系元素,三价镧系元素组成的组中的一种或多种物质 ,三价铁,三价铝,二价金属和一价金属,也可用于从三价锕系元素,三价镧系元素,三价铁,三价铝,二价金属和一价金属中的一种或多种物质中分离六价锕系元素 。