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24 条记录 (耗时 0.01 秒)

    Production of 11-cyanoundecanoic acid
    1.
    发明授权
    Production of 11-cyanoundecanoic acid 失效
    生产11-氰基苯甲酸

    公开(公告)号：US3808240A

    公开(公告)日：1974-04-30

    申请号：US16703371

    申请日：1971-07-28

    申请人： BP CHEM INT LTD

    发明人： NORTH T

    IPC分类号： C07C20060101 ,  C07C121/40 ,  C07D85/00

    CPC分类号： C07C255/00

    摘要： 11-CYANOUNDECANOIC ACID ISPRODUCED BY CONVERTING CYCLOHEXANONE TO 1,1''-PEROXYDICYLOHEXYLAMINE, FOLLOWED BY PYROLYSIS OF THE PEROXYAMINE, THE CYCLOHEXANONE BYPRODUCT FROM THE PYROLYSIS STAGE BEING RECYCLED TO THE FIRST STAGE AFTER PURIFICATION TO REDUCE THE NITRILE CONTENT.

    N-chloro derivatives of diminosuccinonitrile
    2.
    发明授权
    N-chloro derivatives of diminosuccinonitrile 失效
    三氯硝基苯胺的N-氯代衍生物

    公开(公告)号：US3661971A

    公开(公告)日：1972-05-09

    申请号：US3661971D

    申请日：1970-08-31

    申请人： DU PONT

    发明人： HARTTER DONALD RAY

    IPC分类号： C07C255/61 ,  C07C121/20 ,  C07C121/40

    CPC分类号： C07C255/00

    摘要： N,N''-DICHLORODIIMINOSUCCINONTRILE AND N-CHLORO-DIIMINOSUCCINONITRILE CAN BE MADE BY THE ACTION OF CHLORINE ON DIMINOSUCCINONITRILE OR BY THE ACTION OF CHLORINE ON DIAMINOMALEONITRILE. THE CHLORINATED DIINININOSUCCINONITRILES ARE USEFUL AS HERBICIDES, AND PROVIDE CONTROL FOR LAWN WEEDS SUCH AS CRABGRASS. JOHNSON GRASS AND BEGGARTICKS. WERE SIMILARLY CONTROLLED.

    Production of cyanoacetic acid
    4.
    发明授权
    Production of cyanoacetic acid 失效
    生产氰尿酸

    公开(公告)号：US3668231A

    公开(公告)日：1972-06-06

    申请号：US3668231D

    申请日：1970-09-09

    申请人： CHRIS CRAFT IND INC

    发明人： ROSIN JACOB ,  ANG FRANK S

    IPC分类号： C07C121/40

    CPC分类号： C07C255/00

    摘要： Cyanoacetic acid is produced in a sequence of reactions in which an aqueous solution of chloroacetic acid neutralized with sodium carbonate or sodium hydroxide to form sodium chloroacetate which, in turn, is reacted in a nucleophilic substitution with an alkali metal cyanide and the resultant cyanoacetate is then acidified to form an aqueous reaction mixture comprising cyanoacetic acid and the respective salts formed in such reaction sequence. This process is improved A. BY CONDUCTING THE NUCLEOPHILIC SUBSTITUTION REACTION IN THE PRESENCE OF AN ALKANOL AND AT A TEMPERATURE IN EXCESS OF ABOUT 80* C. to accelerate the reaction while substantially precluding undesirable side reactions, thereby increasing the yield of the cyanoacetate and decreasing the tendency of the reaction to form color bodies; and B. BY EXTRACTING THE ACIDIFIED, AQUEOUS REACTION MIXTURE WITH AN ALKANOL WHICH CONTAINS FROM NOT LESS THAN THREE TO ABOUT 12 CARBON ATOMS AND WHICH IS SUBSTANTIALLY INSOLUBLE IN SATURATED BRINE, USING THE AQUEOUS REACTION MIXTURE IN SUCH A MANNER THAT THE AMOUNT OF SALTS IN SUCH REACTION MIXTURE SUBSTANTIALLY SATURATE THE AMOUNT OF WATER PRESENT, THEREBY PERMITTING SUBSTANTIALLY ALL OF THE CYANOACETIC ACID TO BE EXTRACTED BY THE ALKANOL. By using these improvements in a process to produce cyanoacetic acid, it is possible to obtain extremely high yields of cyanoacetic acid using much less process equipment than presently employed to produce this product. The improved process furthermore facilitates the subsequent production of alkyl cyanoacetates and of cyanoacetamide.

    摘要翻译： 氰基乙酸按照一系列反应生成，其中用碳酸钠或氢氧化钠中和的氯乙酸水溶液形成氯乙酸钠，然后再将其与碱金属氰化物和所得的氰基乙酸酯进行亲核取代反应， 酸化以形成含有氰基乙酸的水性反应混合物和在该反应顺序中形成的各自的盐。 该方法得到改善A.通过在碱性条件下，在80℃以下的温度下进行核化替代反应，加速反应，同时基本排除不希望的副反应，从而提高氰乙酸酯的产率和降低 反应形成颜色体的趋势; 和B.通过使用酸性反应混合物，其中含有不少于三个至约12个碳原子的碱性反应混合物，并且其在饱和葡萄酒中是非常重要的，使用水性反应混合物，其中含有大量的盐 这种反应混合物主要饱和水的含量，主要允许由碱性物质提取的所有氰基酸。