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    Chemical process for the preparation of oxamide derivatives and compounds prepared thereby
    1.
    发明授权
    Chemical process for the preparation of oxamide derivatives and compounds prepared thereby 失效
    用于制备草酰胺衍生物的化学方法及其制备的化合物

    公开(公告)号：US4978786A

    公开(公告)日：1990-12-18

    申请号：US507084

    申请日：1990-04-05

    申请人： Giuseppe Messina ,  Giovanni Sechi ,  Loreno Lorenzoni ,  Vittorio Bruzzi

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

    IPC分类号： C05C11/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/08 ,  C07C233/00 ,  C07C233/04 ,  C07C233/05 ,  C07C233/16 ,  C07C233/18 ,  C07C233/36 ,  C07C233/56

    CPC分类号： C07C233/00 ,  C07C233/16

    摘要： A process is described for the preparation of oxamide derivatives wherein one or both --NH.sub.2 groups are replaced by primary or secondary amino groups, through reaction of oxamide with a suitably selected amine of formula RR.sup.1 NH wherein R represents a substituted straight or branched (C.sub.2 -C.sub.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.sup.1 represents hydrogen or an optionally substituted (C.sub.1 -C.sub.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： 描述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RR1NH的胺反应，其中R表示取代的直链或支链（C2-C12 ）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，并且R 1表示氢或任选取代的（C 1 -C 6）烷基 ）烷基; 还描述了可以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 the separation and recovery of boron compounds from a geothermal brine
    5.
    发明授权
    Process for the separation and recovery of boron compounds from a geothermal brine 失效
    从地热卤水中分离和回收硼化合物的方法

    公开(公告)号：US4778597A

    公开(公告)日：1988-10-18

    申请号：US133317

    申请日：1987-12-16

    申请人： Vittorio Bruzzi ,  Angelo Bellini

    发明人： Vittorio Bruzzi ,  Angelo Bellini

    IPC分类号： C01B35/10 ,  B01D13/00

    CPC分类号： C01B35/10 ,  B01D61/002 ,  B01D71/16 ,  B01D2311/02 ,  B01D2311/08

    摘要： Boron compounds are separated and recovered from a geothermal brine, which additionally contains inorganic salts, such as sodium and potassium chlorides and sulphates, by means of a process comprising the following process steps:(a) pre-concentration of the geothermal brine by expansion up to room pressure, to a pressure lower than room pressure;(b) concentration of the pre-concentrated brine, coming from the (a) step, by means of an osmotic treatment against a concentrated aqueous solution of recycled inorganic salts;(c) treatment of crystallization of the concentrated brine, coming from the (b) step, with the separation of the solid inorganic salts from an aqueous solution of boron compounds;(d) recycle of the inorganic salts separated in the (c) step, to the (b) step of osmosis, in the form of a concentrated aqueous solution; and(e) recovery of boron compounds from the relevant aqueous solution obtained in the (c) step.