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    • 67. 发明申请
    • MANUFACTURING METHOD FOR 4-NITROSOANILINE FROM UREA AND NITROBENZENE
    • 尿素和硝基苯的4-硝基苯胺的制备方法
    • WO01036373A1
    • 2001-05-25
    • PCT/KR2000/000205
    • 2000-03-15
    • C07C209/02C07B61/00C07C209/00C07C211/52C07C209/36
    • C07C209/00C07C211/52
    • Disclosed herein is a method for preparing 4-nitrosoaniline, comprising reacting urea and nitrobenzene in a polar organic solvent in the presence of a base at a temperature of room temperature to 150 DEG C. The method uses a relatively cheap urea and nitrobenzene as the raw materials, and also a relatively cheap base, thereby decreasing the manufacturing cost. Urea used as an amine donor is excellent in a reactivity to nitrobenzene, and a reaction intermediate is unstable as compared with 4-(4-nitrophenyl)benzamide to easily decompose into 4-nitroaniline and 4-nitrosoaniline. This allows a reaction time and a process time to be shortened. Moreover, the method is advantageous in that waste hazardous to the environment is not produced as a byproduct.
    • 本文公开了一种制备4-亚硝基苯胺的方法,其包括在碱存在下,在室温至150℃的温度下,在极性有机溶剂中使脲和硝基苯反应。该方法使用相对便宜的尿素和硝基苯作为原料 材料,也是相对便宜的基础,从而降低制造成本。 作为胺供体的尿素与硝基苯的反应性优异,与4-(4-硝基苯基)苯甲酰胺相比,反应中间体不容易分解成4-硝基苯胺和4-亚硝基苯胺。 这允许缩短反应时间和处理时间。 此外,该方法的优点在于,不会产生对环境有害的废物作为副产物。
    • 68. 发明申请
    • METHOD OF PREPARATION OF 4-AMINODIPHENYLAMINE
    • 4-氨基二苯胺的制备方法
    • WO00035853A1
    • 2000-06-22
    • PCT/SK1999/000010
    • 1999-04-29
    • C07B61/00C07C209/02C07C209/36C07C209/38C07C209/60C07C209/68C07C211/50C07C211/52C07C211/55C07C211/56
    • C07C209/38C07C209/36C07C209/68C07C211/55C07C211/56
    • The solution relates to a method of preparation of 4-aminodiphenylamine through an intermediate preparation of 4-nitrodiphenylamine and/or 4-nitrosodiphenylamine and/or their salts by the reaction of aniline with nitrobenzene in a liquid medium at a temperature of 50 to 130 DEG C, under normal or reduced pressure, in an inert atmosphere or in the presence of air oxygen, with subsequent hydrogenation of an intermediate of 4-nitrodiphenylamine and/or nitrosodiphenylamine and side products, and by isolation of 4-aminodiphenylamine and the side products and recirculation of unconverted raw materials. The reaction of aniline with nitrobenzene, with selectivity of at least 50 % of 4-nitrodiphenylamine and nitrosodiphenylamine, is performed in a reaction system, consisting of a true zwitterion salt solution with hydroxides of a general formula HO /(R R R )N -CHR -(CH2)x-Y /Z where R and R means methyl to dodecyl, R means methyl, ethyl, phenyl, benzyl, R means hydrogen or methyl, x means an integer of 0 to 5, Y means CO2 , SO3 and Z means a cation of an alkali metal Li, Na, K, Cs or a tetrasubstituted quaternary ammonium cation, like tetramethylammonium, or their mutual combinations, wherein 4-nitrosophenylamine and/or 4-nitrodiphenylamine and/or their salts arise which yield, after hydrogenation, 4-ADFA, and after the reaction at least a half of the reaction system is used again for the next reaction and/or it is recycled. The reaction medium is formed separately and/or it will be formed in situ in the reaction system from raw materials. The liquid medium for the reaction of aniline with nitrobenzene is formed of water and/or at least one organic compound, chosen from among aniline, pyridine, toluene, xylene, cyclohexane and aliphatic alcohols having the number of carbons in the molecule of 1 to 4.
    • 该方法涉及通过苯胺与硝基苯在液体介质中在50〜130℃的温度下通过4-硝基二苯胺和/或4-亚硝基二苯胺和/或其盐的中间体制备方法制备的方法。 在正常或减压下,在惰性气氛中或在空气氧的存在下,随后氢化4-硝基二苯胺和/或亚硝基二苯胺和副产物的中间体,并通过分离4-氨基二苯胺和副产物和 未转化原料的再循环。 在具有至少50%的4-硝基二苯胺和亚硝基二苯胺的选择性的苯胺与硝基苯的反应在由通式为HO 1 /(R 1)的氢氧化物的真正的两性离子盐溶液组成的反应体系中进行 R 2 R 3)N + CHR 4 - (CH 2)x Y - / Z +其中R 1和R 2表示甲基至十二烷基,R 3 >表示甲基,乙基,苯基,苄基,R 4表示氢或甲基,x表示0〜5的整数,Y表示二氧化碳,SO 3 - ,Z +表示阳离子 的碱金属Li,Na,K,Cs或四取代的季铵阳离子,如四甲基铵或它们的相互组合,其中产生4-亚硝基苯胺和/或4-硝基二苯胺和/或其盐,其在氢化后产生4- 在反应后,反应体系的至少一半再次用于下一反应和/或其被再循环。 反应介质分开形成和/或在反应体系中原位形成原料。 用于苯胺与硝基苯反应的液体介质由水和/或至少一种选自苯胺,吡啶,甲苯,二甲苯,环己烷和分子中碳数为1至4的脂肪族醇的有机化合物形成 。