申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP1243573A1
公开(公告)日:2002-09-25
Disclosed is a method for producing a diol mixture comprising 1,4-butanediol, 1,5-pentanediol and 1,6-hexanediol, which comprises: (A) providing a dicarboxylic acid mixture comprising succinic acid, glutaric acid and adipic acid and having a nitric acid content of 3 % by weight or less, based on the total weight of the succinic, glutaric and adipic acids, wherein the dicarboxylic acid mixture is prepared by denitrating an aqueous by-product solution obtained in an adipic acid production process, and (B) subjecting the dicarboxylic acid mixture to hydrogenation in the presence of water, hydrogen gas and a hydrogenation catalyst containing an active metal species comprising ruthenium and tin, to thereby obtain a hydrogenation reaction mixture comprising a diol mixture comprising 1,4-butanediol, 1,5-pentanediol and 1,6-hexanediol.
本发明公开了一种生产由 1,4-丁二醇、1,5-戊二醇和 1,6-己二醇组成的二元醇混合物的方法,该方法包括(A) 提供一种二羧酸混合物,该混合物包括琥珀酸、戊二酸和己二酸,以琥珀酸、戊二酸和己二酸的总重量为基准,硝酸含量为 3% 或更低,其中该二羧酸混合物是通过对己二酸生产工艺中获得的副产品水溶液进行脱氮制备的、(B) 将二羧酸混合物在水、氢气和含有由钌和锡组成的活性金属的氢化催化剂存在下进行氢化,从而得到氢化反应混合物,该混合物包括由 1,4-丁二醇、1,5-戊二醇和 1,6-己二醇组成的二元醇混合物。