Process for recovering noble metals from solutions deriving from the
treatment of nuclear fuels
    1.
    发明授权
    Process for recovering noble metals from solutions deriving from the treatment of nuclear fuels 失效
    从处理核燃料的溶液中回收贵金属的方法

    公开(公告)号:US5393322A

    公开(公告)日:1995-02-28

    申请号:US940917

    申请日:1992-09-04

    申请人: Renato Ugo

    发明人: Renato Ugo

    IPC分类号: C01G55/00 C22B11/00

    摘要: A process for recovering palladium, rhodium and ruthenium from aqueous solutions deriving from the treatment of nuclear fuels and containing also iron and nickel, by reducing carbonylation with carbon monoxide at a pressure up to 1 atmosphere in a nitric acid solution at a pH of between 2 and 4 and at a temperature of between room and 100.degree. C. and reaction times of from 6 to 100 hours.

    摘要翻译: 通过在硝酸溶液中,在pH为2以下的压力下,一氧化碳在一氧化碳气氛下还原羰基化,从处理核燃料并含有铁和镍的水溶液中回收钯,铑和钌的方法 和4,室温至100℃,反应时间为6至100小时。

    Process for the preparation of thiocarbamates
    2.
    发明授权
    Process for the preparation of thiocarbamates 失效
    硫代氨基甲酸酯的制备方法

    公开(公告)号:US4617416A

    公开(公告)日:1986-10-14

    申请号:US713603

    申请日:1985-03-19

    CPC分类号: C07C333/02

    摘要: There is disclosed a process for the preparation of thiocarbamates having the following general formula: ##STR1## wherein: R represents alkyl C.sub.1 -C.sub.4 optionally substituted with one or more halogen atoms, alkenyl C.sub.2 -C.sub.4 optionally substituted with one or more halogen atoms, phenyl optionally substituted with one or more halogen atoms, benzyl optionally substituted with one or more halogen atoms on the phenyl ring;R.sup.1 and R.sup.2, equal or different from one another, represent alkyl C.sub.1 -C.sub.4 or cycloalkyl;consisting in reacting organic dithiocarbonates with organic carbamoyl halides, in the presence of an aqueous solution of an inorganic base and a phase transfer catalyst, at a temperature of 10.degree. to 50.degree. C. for time periods of 5 to 10 hours.The thiocarbamates obtained are used as herbicides, fungicides, etc., and in general in various fields of "fine chemicals".

    摘要翻译: 公开了制备具有以下通式的硫代氨基甲酸酯的方法:其中:R表示任选被一个或多个卤素原子取代的C 1 -C 4烷基,任选被一个或多个卤素原子取代的烯基C 2 -C 4,苯基 任选地被一个或多个卤素原子取代,苯基上任选被一个或多个卤素原子取代的苄基; R1和R2彼此相同或不同,表示烷基C1-C4或环烷基; 在有机二硫代碳酸酯与有机氨基甲酰卤反应的条件下,在无机碱和相转移催化剂的水溶液存在下,在10〜50℃的温度下反应5〜10小时。 所得的硫代氨基甲酸酯用作除草剂,杀真菌剂等,一般用于“精细化学品”的各个领域。

    Process for separating and recovering rhodium and iridium from their
mixtures with other precious metals
    4.
    发明授权
    Process for separating and recovering rhodium and iridium from their mixtures with other precious metals 失效
    从其与其他贵金属的混合物中分离和回收铑和铱的方法

    公开(公告)号:US4081271A

    公开(公告)日:1978-03-28

    申请号:US780103

    申请日:1977-03-22

    申请人: Renato Ugo

    发明人: Renato Ugo

    摘要: Process for separating and recovering rhodium and/or iridium from the other precious metals (Pd, Pt, Ru, Os, Au, Ag), according to which a solution containing the precious metals in any form is treated for a time between 15 minutes and 10 hours with carbon monoxide in the presence of a quantity of water or primary or secondary alcohols at least equal in weight to the total quantity of precious metals present, the crystalline precipitate which forms, and which contains all the noble metals except Rh and Ir in a state of high purity is separated and the Rh and/or Ir are recovered practically totally from the solution.

    摘要翻译: 从其他贵金属(Pd,Pt,Ru,Os,Au,Ag)中分离和回收铑和/或铱的方法,根据该方法,将含有任何形式的贵金属的溶液处理15分钟至 在一定量的水或伯或仲醇的存在下,与一氧化碳至少等于存在的贵金属的总量,形成的结晶沉淀物,并含有除Rh和Ir之外的所有贵金属, 分离出高纯度的状态,并且几乎完全从溶液中回收Rh和/或Ir。