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    Method for producing 1, 6 hexane diol
    1.
    发明申请
    Method for producing 1, 6 hexane diol 失效

    公开(公告)号：US20070112225A1

    公开(公告)日：2007-05-17

    申请号：US10580685

    申请日：2005-10-27

    申请人： Tilman Sirch ,  Gerd-Dieter Tebben ,  Ludwig Heck ,  Armin Diefenbacher ,  Alfred Krause ,  Franz Borgel

    发明人： Tilman Sirch ,  Gerd-Dieter Tebben ,  Ludwig Heck ,  Armin Diefenbacher ,  Alfred Krause ,  Franz Borgel

    IPC分类号： C07C31/18

    CPC分类号： B01D61/025 ,  C07C29/149 ,  C07C31/20

    摘要： The present invention provides a process for preparing 1,6-hexanediol from a carboxylic acid mixture which comprises adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols and is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-containing gases and by water extraction of the reaction mixture, by esterification of the acids and hydrogenation, in which a) the mono- and dicarboxylic acids present in the aqueous dicarboxylic acid mixture are reacted with a low molecular weight alcohol to give the corresponding carboxylic esters, b) the resulting esterification mixture is freed of excess alcohol and low boilers in a first distillation stage, c) a separation of the bottom product is carried out 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, d) the ester fraction substantially free of 1,4-cyclohexanediols is catalytically hydrogenated and e) 1,6-hexanediol is obtained in a purifying distillation stage from the hydrogenation effluent while removing an alcohol-low boiler mixture in a manner known per se, wherein alcohol is removed by a membrane system from the mixtures, obtained after the esterification in stage b) and/or after the hydrogenation in stage e), of alcohols and low boilers and recycled into the esterification.

    Method for producing 1, 6 hexane diol
    2.
    发明授权
    Method for producing 1, 6 hexane diol 失效
    1,6-己二醇的制备方法

    公开(公告)号：US07307194B2

    公开(公告)日：2007-12-11

    申请号：US10580685

    申请日：2005-10-27

    申请人： Tilman Sirch ,  Gerd-Dieter Tebben ,  Ludwig E. Heck ,  Armin Diefenbacher ,  Alfred Krause ,  Franz Borgel

    发明人： Tilman Sirch ,  Gerd-Dieter Tebben ,  Ludwig E. Heck ,  Armin Diefenbacher ,  Alfred Krause ,  Franz Borgel

    IPC分类号： C07C31/20

    CPC分类号： B01D61/025 ,  C07C29/149 ,  C07C31/20

    摘要： The present invention provides a process for preparing 1,6-hexanediol from a carboxylic acid mixture which comprises adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols and is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-containing gases and by water extraction of the reaction mixture, by esterification of the acids and hydrogenation, in which a) the mono- and dicarboxylic acids present in the aqueous dicarboxylic acid mixture are reacted with a low molecular weight alcohol to give the corresponding carboxylic esters, b) the resulting esterification mixture is freed of excess alcohol and low boilers in a first distillation stage, c) a separation of the bottom product is carried out 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, d) the ester fraction substantially free of 1,4-cyclohexanediols is catalytically hydrogenated and e) 1,6-hexanediol is obtained in a purifying distillation stage from the hydrogenation effluent while removing an alcohol-low boiler mixture in a manner known per se, wherein alcohol is removed by a membrane system from the mixtures, obtained after the esterification in stage b) and/or after the hydrogenation in stage e), of alcohols and low boilers and recycled into the esterification.

    摘要翻译： 本发明提供了由羧酸混合物制备1,6-己二醇的方法，该方法包括己二酸，6-羟基己酸和少量的1,4-环己二醇，并且作为副产物在环己烷氧化中得到， 环己酮/环己醇与氧或含氧气体反应，并通过酸的酸化和氢化水提取反应，其中a）存在于二羧酸水溶液混合物中的单羧酸和二羧酸与低分子量 重量醇以得到相应的羧酸酯，b）所得酯化混合物在第一蒸馏阶段中不含过量的醇和低沸点，c）将底部产物在第二蒸馏阶段中分离成基本上为酯馏分 不含1,4-环己烷二醇和至少包含大部分1,4-环己二醇的级分，d）酯级分基本上不含1， 4-环己烷二醇是催化氢化的，并且e）在纯化蒸馏阶段从氢化流出物中获得1,6-己二醇，同时以本身已知的方式除去醇低沸点混合物，其中醇通过膜系统从 在阶段b）和/或在步骤e）中的氢化后获得的醇和低锅炉中获得的并且再循环到酯化中的混合物。

    Method For Production Of 1,6-Hexanediol With A Purity In Excess of 99.5%
    5.
    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）。