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    Method For Production Of 1,6-Hexanediol With A Purity In Excess of 99.5%
    6.
    发明申请
    Method For Production Of 1,6-Hexanediol With A Purity In Excess of 99.5% 失效
    1,6-己二醇生产方法纯度超过99.5％

    公开(公告)号：US20080207958A1

    公开(公告)日：2008-08-28

    申请号：US10569980

    申请日：2005-07-07

    申请人： Andrea Haunert ,  Rolf Pinkos ,  Thomas Krug ,  Tilman Sirch ,  Michael Koch ,  Gerd-Dieter Tebben

    发明人： Andrea Haunert ,  Rolf Pinkos ,  Thomas Krug ,  Tilman Sirch ,  Michael Koch ,  Gerd-Dieter Tebben

    IPC分类号： C07C29/143

    CPC分类号： C07C29/145 ,  C07C29/149 ,  C07C2601/14 ,  C07C31/20 ,  C07C35/08

    摘要： The present invention provides a process for preparing 1,6-hexanediol by hydrogenating dialkyl adipates, alkyl 6-hydroxycaproates, 1,4-cyclohexanedione and 4-hydroxycyclohexan-1-one as ester mixtures comprising impurities, by a) freeing resulting the esterification mixture of excess alcohol and low boilers in a first distillation stage (alcohol removal), b) carrying out a separation of the bottom product in a second distillation stage into an ester fraction substantially free of 1,4-cyclohexanediols and a fraction comprising at least the majority of the 1,4-cyclohexanediols, c) catalytically hydrogenating the ester fraction substantially free of 1,4-cyclohexanediols (ester hydrogenation) and d) in a purifying distillation stage, obtaining 1,6-hexanediol from the hydrogenation effluent in a manner known per se, which comprises selectively hydrogenating the ester mixture before stage a) and/or before stage b) (purifying hydrogenation).

    摘要翻译： 本发明提供了一种通过以下方式制备1,6-己二醇的方法：通过以下方法将氢化己二酸二烷基酯，6-羟基己酸烷基酯，1,4-环己二酮和4-羟基环己烷-1-酮作为包含杂质的酯混合物， 在第一蒸馏阶段（醇去除）中的过量醇和低锅炉的b），b）在第二蒸馏阶段中将底部产物分离成基本上不含1,4-环己二醇的酯馏分和至少包含 大部分1,4-环己烷二醇，c）催化氢化基本上不含1,4-环己二醇的酯馏分（酯氢化）和d）在纯化蒸馏阶段，以一种方式从氢化流出物中获得1,6-己二醇 本身已知，其包括在阶段a）和/或阶段b）之前选择性地氢化酯混合物（纯化氢化）。