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    • 8. 发明授权
    • Process for producing benzophenone-azine
    • 二苯甲酮吖嗪的制备方法
    • US4751326A
    • 1988-06-14
    • US684419
    • 1984-12-20
    • Takanari NawataShuzabu SakaguchiToshiaki KohzakiOsamu AokiNorio TakedaMasafumi Shimpo
    • Takanari NawataShuzabu SakaguchiToshiaki KohzakiOsamu AokiNorio TakedaMasafumi Shimpo
    • C07B61/00B01J27/00B01J27/32C07C67/00C07C241/00C07C251/88C07C109/04
    • C07C251/88B01J27/32Y02P20/584
    • An improved process for producing benzophenone-azine in which a catalyst can be removed, recovered and recycled is disclosed. The process comprises the steps of:(a) oxidizing benzophenone-imine with molecular oxygen in the presence of cuprous chloride catalyst to produce an oxidation reaction mixture containing benzophenone-azine;(b) contacting the oxidation reaction mixture obtained in step (a) with an aqueous solution containing ammonium chloride and hydrochloric acid to decompose the remaining benzophenone-imine substantially without causing decomposition of the produced benzophenone-azine and simultaneously to extract the catalyst from the oxidation reaction mixture;(c) separating the oxidation reaction mixture containing benzophenone-azine after the extraction in step (b) to recover benzophenone-azine as a solution;(d) neutralizing the catalyst-containing aqueous solution separated after the extraction step (b) with ammonia and then contacting the neutralized catalyst-containing aqueous solution with benzophenone-imine to extract the catalyst into benzophenone-imine; and(e) separating the benzophenone-imine solution containing the catalyst obtained after extraction in step (d) from the aqueous layer and recycling said solution to step (a) to reuse as a catalyst for step (a), without isolating the catalyst from said benzophenone-imine solution.
    • 公开了可以除去,回收和回收催化剂的二苯甲酮 - 吖嗪的改进方法。 该方法包括以下步骤:(a)在氯化亚铜催化剂存在下用分子氧氧化二苯甲酮 - 亚胺以产生含有二苯甲酮 - 吖嗪的氧化反应混合物; (b)将步骤(a)中获得的氧化反应混合物与含有氯化铵和盐酸的水溶液接触,基本上分解剩余的二苯甲酮 - 亚胺,而不会引起生成的二苯甲酮 - 吖嗪的分解,同时从催化剂中提取催化剂 反应混合物; (c)在步骤(b)中提取后分离含有二苯甲酮 - 吖嗪的氧化反应混合物,以二苯甲酮 - 吖嗪为溶液回收; (d)用氨中和提取步骤(b)后分离的含催化剂的水溶液,然后使中和的含有催化剂的水溶液与二苯甲酮 - 亚胺接触,将催化剂萃取到二苯甲酮 - 亚胺中; 和(e)将步骤(d)中提取后得到的含有催化剂的二苯甲酮 - 亚胺溶液从水层中分离出来,并将所述溶液再循环到步骤(a)中以再利用作为步骤(a)的催化剂,而不将催化剂从 称二苯甲酮 - 亚胺溶液。
    • 10. 发明授权
    • Process for preparing hydrazine hydrohalogenide
    • 制备氢卤化肼的方法
    • US4628119A
    • 1986-12-09
    • US702553
    • 1985-02-19
    • Takanari NawataShuzabu SakaguchiOsamu Aoki
    • Takanari NawataShuzabu SakaguchiOsamu Aoki
    • B01J23/00B01J27/122C01B21/16C07C109/04
    • C07C251/88C01B21/16Y02P20/584
    • A process for preparing hydrazine hydrohalogenide is disclosed. The process comprises the steps of:(a) oxidizing benzophenone-imines with molecular oxygen in the presence of a copper halide catalyst to produce benzophenone-azines;(b) contacting the oxidation reaction mixture with an aqueous solution containing a hydrohalogenic acid thereby hydrolyzing the benzophenone-azines to produce a hydrazine hydrohalogenide and, simultaneously, extracting and removing the catalyst with the hydrohalogenic acid-containing aqueous solution to obtain an aqueous solution containing the hydrazine hydrohalogenide and the catalyst;(c) separating the aqueous solution and adjusting the solution to a pH of from 3 to 7 with an alkali;(d) contacting the aqueous solution with benzophenone-imines to extract the catalyst;(e) separating the catalyst-containing benzophenone-imines solution from the aqueous solution containing the hydrazine hydrohalogenide to recover the hydrazine hydrohalogenide and to recycle the catalyst-containing benzophenone-imines solution to step (a).The process is advantageous in that the catalyst is easily recovered for reuse.
    • 公开了一种制备氢卤酸肼的方法。 该方法包括以下步骤:(a)在卤化铜催化剂存在下用分子氧氧化二苯甲酮 - 亚胺,生成二苯甲酮 - 吖嗪; (b)使氧化反应混合物与含有氢卤酸的水溶液接触,从而水解二苯甲酮 - 吖嗪以产生氢卤酸肼,同时用含氢卤酸的水溶液萃取和除去催化剂,得到含有 肼氢卤化物和催化剂; (c)用碱分离水溶液并将溶液调节至3至7的pH; (d)使该水溶液与二苯甲酮 - 亚胺接触以提取催化剂; (e)从含有氢卤化肼的水溶液中分离含催化剂的二苯甲酮 - 亚胺溶液以回收氢卤酸肼,并将含有催化剂的二苯甲酮 - 亚胺溶液再循环到步骤(a)。 该方法的优点在于催化剂容易回收再利用。