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    • 37. 发明申请
    • METHOD FOR PRODUCING CYCLIC LACTAMS
    • 用于生产环内酰胺
    • WO01083444A1
    • 2001-11-08
    • PCT/EP2001/004841
    • 2001-04-30
    • C07D223/10C07B61/00C07D201/08C07D207/263C07D211/76C07D225/02
    • C07D201/08
    • The invention relates to a method for producing cyclic lactams of the formula (II), wherein n and m may each represent 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 and the sum of n + m is at least 3, preferably at least 4, R and R represent C1-C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups, by reacting a compound of the formula (I), wherein R , R , m and n have the meaning indicated above, and R represents nitrile groups, carboxylic acid amide groups and carboxylic acid groups, with water vapor in the gaseous phase. The inventive method is further characterized in that a) the compound (I) is reacted with water vapor in the gaseous phase, adding an organic diluent (III) before or after the reaction, which diluent has a miscibility gap under certain quantitative, pressure and temperature conditions, said reaction resulting in a mixture (IV) that contains a lactam (II), b) adjusting the mixture (IV) before or after the removal of ammonia to quantitative, pressure and temperature conditions under which the diluent (III) and water are present in a liquid form and have a miscibility gap, and obtaining a two-phase system consisting of a phase (V) that has a higher proportion of diluent (III) than water, and a phase (VI) that has a higher proportion of water than diluent (III), c) separating phase (V) from phase (VI) and, d) removing from phase (V) the diluent (III) and optionally by-products selected from the group of the low-boilers, high-boilers and unreacted compound (I), and obtaining a lactam (II).
    • 一种用于制备式(II),其中n和m的环状内酰胺过程各自为0,1,2,3,4,5,6,7,8和9可以具有和n + m的和至少为3, 优选至少4,R <1>和R <2> C 1 -C 6 - 烷基,代表C 5 -C 7环烷基或C 6 -C 12 - 芳基,通过将式(I)化合物进行反应,其中R <1 >,R <2>,m和n是如上,R腈,羧酰胺和羧酸基团的意思是与水蒸汽在气相中通过使作为定义,与在气相中的水蒸汽,其特征在于:a)化合物(I) 之前或有机稀释剂(III)的反应之后被添加,含有水在一定的量,压力和温度条件下混溶隙,以得到混合物(IV),其包括内酰胺(II),b)将该混合物( 转换后的IV)之前或在数量,压力和温度条件的去除氨之后在其下Verdünnungsm edium(III)和水的液体,并表现出混溶性间隙,得到的两两相体系包括包含稀释剂(III)比水高的比例的相(V),和一个相(VI)含有水的比例较高 具有作为稀释剂(III)中,c)相(V)(相VI)被分离出来和d)的相位(V),所述稀释剂(III)和任选的副产物选自低锅炉,高沸点和未反应的Verbindug的组中选择 (I)分离,得到内酰胺(II)。