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11 条记录 (耗时 0.011 秒)

    Process for purifying oxalic acid diamide
    1.
    发明公开
    Process for purifying oxalic acid diamide 失效
    纯化二氧化氨的方法

    公开(公告)号：EP0271161A3

    公开(公告)日：1989-04-12

    申请号：EP87202424.5

    申请日：1987-12-07

    申请人： ENICHEM ANIC S.p.A.

    发明人： Lorenzoni, Loreno ,  Messina, Giuseppe ,  Bruzzi, Vittorio

    IPC分类号： C07C231/00 ,  C07C233/03

    CPC分类号： C07C235/00

    摘要： A process is disclosed for the purification of the diamide of oxalic acid obtained by means a process wherein copper catalysts are used, by means of the washing with aqueous solutions of an ammonium salt of an organic or inorganic acid, operating at a pH value comprised within the range of from 2 to 8, and at a temperature comprised within the range of from 40 to 150°C.

    Method of purification of the oxalic acid diamide
    2.
    发明公开
    Method of purification of the oxalic acid diamide 失效
    Verfahren zur Reinigung vonOxalsäurediamid。

    公开(公告)号：EP0245632A2

    公开(公告)日：1987-11-19

    申请号：EP87104676.9

    申请日：1987-03-30

    申请人： ENICHEM ANIC S.p.A.

    发明人： Lorenzoni, Loreno ,  Dessantis, Nino ,  Virdis, Angelo

    IPC分类号： C07C233/56 ,  C07C231/06

    CPC分类号： C07C235/00

    摘要： A method of removing copper from oxamide obtained through a process which involves the use of copper catalysts, by contacting it with an aqueous solution of a suitable complexing agent, which is capable offorming copper-containing water-soluble complexes and imparts to the aqueous solution a pH comprised between 2 and 8, optionally repeating the contacting step and, finally, recovering the purified oxamide by solid-liquid separation techniques.
    The claimed process affords oxamide containing less than 25 ppm of copper.

    摘要翻译： 通过使铜催化剂与能够形成含铜水溶性络合物并赋予水溶液的合适络合剂的水溶液接触，通过涉及使用铜催化剂的方法获得的从草酰胺中除去铜的方法 pH在2和8之间，任选地重复接触步骤，最后通过固液分离技术回收纯化的氧杂酰胺。 所要求的方法提供含有少于25ppm铜的草酰胺。

    Method of purification of the oxalic acid diamide
    3.
    发明公开
    Method of purification of the oxalic acid diamide 失效
    纯化二氧化氨的方法

    公开(公告)号：EP0245632A3

    公开(公告)日：1988-05-25

    申请号：EP87104676

    申请日：1987-03-30

    申请人： ENICHEM ANIC S.p.A.

    发明人： Lorenzoni, Loreno ,  Dessantis, Nino ,  Virdis, Angelo

    IPC分类号： C07C103/147 ,  C07C102/08

    CPC分类号： C07C235/00

    摘要： A method of removing copper from oxamide obtained through a process which involves the use of copper catalysts, by contacting it with an aqueous solution of a suitable complexing agent, which is capable offorming copper-containing water-soluble complexes and imparts to the aqueous solution a pH comprised between 2 and 8, optionally repeating the contacting step and, finally, recovering the purified oxamide by solid-liquid separation techniques. The claimed process affords oxamide containing less than 25 ppm of copper.

    Chemical process for the preparation of oxamide derivatives.
    6.
    发明公开
    Chemical process for the preparation of oxamide derivatives. 失效
    Chemisches Verfahren zur Herstellung vonAbkömmlingenvon Oxamid。

    公开(公告)号：EP0245631A2

    公开(公告)日：1987-11-19

    申请号：EP87104675.1

    申请日：1987-03-30

    申请人： ENICHEM ANIC S.p.A.

    发明人： Messina, Giuseppe ,  Sechi, Giovanni ,  Lorenzoni, Loreno ,  Bruzzi, Vittorio

    IPC分类号： C07C237/08 ,  C07C237/10 ,  C07C231/00

    CPC分类号： C07C233/00 ,  C07C233/16

    摘要： A process is disclosed for the preparation of oxamide derivatives wherein one or both -NH 2 groups are replaced by primary or secondary amino groups, through reaction of oxamide with a suitably selected amine of formula RR 1 NH wherein R represents a substituted straight or branched (C 2 -C 12 )alkyl radical wherein the substituent(s) or at least one of the substituents is selected from the group consisting of hydroxy, amino, mono-substituted amino, and di-substituted amino, and R' represents hydrogen or an optionally substituted (C 1 -C 6 )alkyl radical; representative oxamide derivatives which can thus be obtained useful as corrosion inhibitors, intermediates for polymers, polymer stabilizers, and slow-release fertilizers, are also described.

    摘要翻译： 公开了制备其中一个或两个-NH 2基团被伯或仲氨基取代的酰胺衍生物的方法，通过草酰胺与适当选择的式RR 1 NH的胺反应，其中R表示取代的直链或支链 （C 2 -C 12）烷基，其中取代基或至少一个取代基选自羟基，氨基，单取代的氨基和二取代的氨基，R 1表示氢或 任选取代的（C 1 -C 6）烷基; 还描述了可用作腐蚀抑制剂的代表性的草酰胺衍生物，聚合物的中间体，聚合物稳定剂和缓释肥料。

    Process for purifying oxalic acid diamide
    10.
    发明公开
    Process for purifying oxalic acid diamide 失效
    Verfahren zur Reinigung vonOxalsäurediamid。

    公开(公告)号：EP0271161A2

    公开(公告)日：1988-06-15

    申请号：EP87202424.5

    申请日：1987-12-07

    申请人： ENICHEM ANIC S.p.A.

    发明人： Lorenzoni, Loreno ,  Messina, Giuseppe ,  Bruzzi, Vittorio

    IPC分类号： C07C231/00 ,  C07C233/03

    CPC分类号： C07C235/00

    摘要： A process is disclosed for the purification of the diamide of oxalic acid obtained by means a process wherein copper catalysts are used, by means of the washing with aqueous solutions of an ammonium salt of an organic or inorganic acid, operating at a pH value comprised within the range of from 2 to 8, and at a temperature comprised within the range of from 40 to 150°C.

    摘要翻译： 公开了通过使用铜催化剂的方法，通过用有机或无机酸的铵盐的水溶液洗涤所得到的草酸二酰胺的纯化方法，该水溶液以包含在其中的pH值 范围为2至8，温度范围为40至150℃。