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    • 7. 发明授权
    • Method for production of 1,6-hexanediol with a purity in excess of 99.5%
    • 制备纯度超过99.5%的1,6-己二醇的方法
    • US07449609B2
    • 2008-11-11
    • US10569980
    • 2005-07-07
    • Andrea HaunertRolf PinkosThomas KrugTilman SirchMichael KochGerd-Dieter Tebben
    • Andrea HaunertRolf PinkosThomas KrugTilman SirchMichael KochGerd-Dieter Tebben
    • C07C29/149
    • C07C29/145C07C29/149C07C2601/14C07C31/20C07C35/08
    • 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).
    • 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-环己烷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)。
    • 9. 发明授权
    • Preparation of cyclopentenones
    • 环戊烯酮的制备
    • US06828464B2
    • 2004-12-07
    • US10718795
    • 2003-11-24
    • Shelue LiangRolf-Hartmuth FischerSylvia Huber-DirrAndrea Haunert
    • Shelue LiangRolf-Hartmuth FischerSylvia Huber-DirrAndrea Haunert
    • C07C4554
    • B01J23/04C07C45/48Y02P20/582C07C49/597
    • The present invention provides a process for preparing 2-cyclopentenones of the general formula: where R1 to R4 are each hydrogen atoms or are alkyl or alkenyl radicals having from 1 to 12 carbon atoms, cycloalkyl or cycloalkenyl radicals having from 5 to 7 carbon atoms, aralkylene or aryl radicals, by converting hexenedioic acids and/or their esters of the general formulae where R1 to R4 are each as defined above and R5 and R6 are each hydrogen atoms or are alkyl radicals having from 1 to 12 carbon atoms, cycloalkyl radicals having 5 or 6 carbon atoms, aralkyl or aryl radicals, at temperatures of from 150 to 450° C., over solid, oxidic catalysts, wherein the catalysts on an oxidic support material comprise from 0.01 to 5% by weight of at least one alkali metal oxide.
    • 本发明提供一种制备以下通式的2-环戊烯酮的方法:其中R 1至R 4各自为氢原子或具有1至12个碳原子的烷基或烯基,环烷基或环烯基具有 5-7个碳原子的亚芳基或芳基,通过将通式R 1至R 4的通式所示的己烯二酸和/或它们的酯各自如上所定义,R 5和R 6各自为 氢原子或具有1至12个碳原子的烷基,具有5或6个碳原子的环烷基,芳烷基或芳基,在150-450℃的温度下,在固体,氧化催化剂上,其中催化剂在 氧化载体材料包含0.01至5重量%的至少一种碱金属氧化物。