Process for preparing n,n'-disubstituted urea using selenium-based
catalyst
    8.
    发明授权
    Process for preparing n,n'-disubstituted urea using selenium-based catalyst 有权
    使用硒基催化剂制备n,n'-二取代脲的方法

    公开(公告)号:US6127575A

    公开(公告)日:2000-10-03

    申请号:US395388

    申请日:1999-09-13

    CPC分类号: C07C273/1809 C07C2101/14

    摘要: A process is disclosed for preparing N,N'-disubstituted urea by reacting an amine and CO/O.sub.2 mixture gas in the presence of a catalyst system comprising at least one selenium compound selected from SeO.sub.2, (CH.sub.3 O)Se(O)(OH) and (CH.sub.3 CH.sub.2 O)Se(O)(OH), and M.sub.2 CO.sub.3 (M=alkali metal) as a co-catalyst. The process enables less active aromatic amine with a low reactivity as well as an aliphatic amine to be easily transformed into disubstituted urea avoiding the use of expensive precious metal catalysts.

    摘要翻译: 公开了一种通过在包含至少一种选自SeO 2,(CH 3 O)Se(O)(OH))的硒化合物的催化剂体系存在下使胺和CO / O 2混合气体反应来制备N,N'-二取代的脲的方法, 和(CH 3 CH 2 O)Se(O)(OH)和作为助催化剂的M2CO3(M =碱金属)。 该方法使得具有低反应性的较少活性的芳族胺以及脂族胺易于转化为二取代的脲,避免使用昂贵的贵金属催化剂。

    Method for preparation of carbamates
    9.
    发明授权
    Method for preparation of carbamates 失效
    氨基甲酸酯的制备方法

    公开(公告)号:US5962721A

    公开(公告)日:1999-10-05

    申请号:US69285

    申请日:1998-04-29

    CPC分类号: C07C269/04

    摘要: A method of preparing carbamates by reacting amine with alcohol and mixed gas of CO/O.sub.2 in the presence of one or more catalyst selected from the group consisting of monovalent copper halide having the structural formula of Cu�NCMe.sub.4 !X, K�CuX.sub.2 !, �CuX(S)! (wherein X=Cl, Br, or I; S=solvent) or monovalent copper compound having carbonyl group having the structural formula of �Cu(CO)X.sub.a L.sub.b !.sub.m Y.sub.n (wherein, X=CF.sub.3 CO.sub.2, Cl, HB(pz).sub.3 (wherein, pz=pyrazoyl,C.sub.3 H.sub.3 N.sub.2), LBF.sub.2, {LBF.sub.2 =difluoro-3,3'-(trimethylenedinitrilo)bis(2-butanone oximato)borate}; L=en, diene; Y=BPh.sub.4, AsF.sub.6 ; a,b=0,1; m=1-4; n=0,1).

    摘要翻译: 在一种或多种催化剂存在下,通过使胺与醇和CO 2 O 2的混合气体反应制备氨基甲酸酯的方法,所述催化剂选自具有结构式为Cu [NCMe4] X,K [CuX2], [CuX(S)](其中X = Cl,Br或I; S =溶剂)或具有结构式为[Cu(CO)XaLb] mYn的羰基的一价铜化合物(其中,X = CF 3 CO 2, HB(pz)3(其中,pz =吡唑基,C3H3N2),LBF2,{LBF2 =二氟-3,3' - (三亚甲基二亚硝基)双(2-丁酮肟基)硼酸酯}; L =烯,二烯; Y = BPh4, AsF6; a,b = 0,1; m = 1-4; n = 0,1)。

    Ionic liquids, the method for preparing the same and method for removing acetylenes from olefin mixtures using the ionic liquids
    10.
    发明授权
    Ionic liquids, the method for preparing the same and method for removing acetylenes from olefin mixtures using the ionic liquids 有权
    离子液体,其制备方法和使用离子液体从烯烃混合物中除去乙炔的方法

    公开(公告)号:US08785711B2

    公开(公告)日:2014-07-22

    申请号:US12970346

    申请日:2010-12-16

    IPC分类号: C07C7/11

    摘要: There are provided an ionic liquid having ether group(s) in which a copper(I) compound is included, a method for preparing the same, and a method for removing traces amounts of acetylene-based hydrocarbon compounds included in olefin by absorption or extraction using the same. When the disclosed solution is used, oxidation of Cu(I) to Cu(II) is prevented since CuX is stabilized by the ionic liquid. Thus, selective removal efficiency of acetylenic compounds is improved greatly while the removal performance is retained for a long period of time. Further, since the solution according to the present disclosure is applicable as an extractant as well as an absorbent, the associated operation is simple and apparatus cost can be decreased.

    摘要翻译: 提供了具有其中包含铜(I)化合物的醚基的离子液体,其制备方法和通过吸收或提取除去烯烃中痕量的乙炔类烃化合物的方法 使用相同 当使用所公开的溶液时,防止Cu(I)氧化为Cu(II),因为CuX被离子液体稳定。 因此,在除去性能长时间保持的同时,炔属化合物的选择性除去效率大大提高。 此外,由于根据本公开的溶液可用作萃取剂和吸收剂,因此相关操作简单,并且可以降低装置成本。