申请人:Pinkos Rolf
公开号:US20120010419A1
公开(公告)日:2012-01-12
The invention relates to a process for preparing 1,6-hexanediol and caprolactone, preferably with at least 99.5% purity, which are especially virtually free of 1,4-cyclohexanediols, from a carboxylic acid mixture which is obtained as a by-product of the catalytic oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases and by water extraction of the reaction mixture, by hydrogenating the carboxylic acid mixture, esterifying and hydrogenating a substream to hexanediol and cyclizing 6-hydroxycaproic ester, the 1,4-cyclohexanediols being removed either in the course of fractionation of the esterification mixture or last from the caprolactone.
该发明涉及一种制备1,6-己二醇和己内酯的过程,优选至少具有99.5%纯度,这些产品特别几乎不含1,4-环己二醇,从羧酸混合物中获得,该混合物是环己烷催化氧化制备环己酮/环己醇的副产物,通过水提取反应混合物,通过加氢羧酸混合物,酯化和加氢亚流向己二醇和环化6-羟基己酸酯,1,4-环己二醇可以在酯化混合物的分馏过程中或最后从己内酯中除去。