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    • 35. 发明授权
    • Process for the production of butane-1,4-diol
    • 制备丁烷-1,4-二醇的方法
    • US4584419A
    • 1986-04-22
    • US673797
    • 1984-11-21
    • Mohammad SharifKeith Turner
    • Mohammad SharifKeith Turner
    • C07C29/132B01J31/00C07B61/00C07C27/00C07C29/149C07C29/17C07C31/20C07C67/00C07D315/00C07D317/08H02P25/06C07C29/136
    • C07D315/00C07C29/149C07C29/177C07D317/08
    • A process for the production of butane-1,4-diol comprises hydrogenating a di(C.sub.1 to C.sub.3 alkyl) ester of a C.sub.4 dicarboxylic acid, e.g. an ester of a but-2-en-1,4-dioic acid, such as diethyl maleate, in the vapor phase at a temperature of from about 150.degree. C. to about 240.degree. C. and at a pressure in the range of from about 25 bar to about 75 bar in the presence of a reduced copper chromite catalyst, and recovering resulting butane-1,4-diol containing reaction product. The catalyst contains, before reduction, from about 25 to about 45% by weight of copper and from about 20 to about 35% by weight of chromium and preferably has an internal surface area of at least about 30 sq. m. per gram. The process is preferably conducted in two or more reaction zones, which are preferably operated adiabatically, the feed temperature to the first zone being higher than that to at least one subsequent reaction zone.
    • 制备丁烷-1,4-二醇的方法包括使C4二羧酸的二(C1-C3烷基)酯例如氢化。 异丁烯-1,4-二酸如马来酸二乙酯的酯在气相中在约150℃至约240℃的温度和在 在还原的亚铬酸铜催化剂存在下,从约25巴至约75巴,并回收得到的含丁烷-1,4-二醇的反应产物。 催化剂在还原前含有约25至约45重量%的铜和约20至约35重量%的铬,优选具有至少约30平方米的内表面积。 每克。 该方法优选在两个或更多个反应区中进行,优选以绝热方式操作,第一区的进料温度高于至少一个后续反应区的进料温度。