PROCESS FOR THE MANUFACTURE OF TMHQ
    19.
    发明申请
    PROCESS FOR THE MANUFACTURE OF TMHQ 有权
    TMHQ制造流程

    公开(公告)号:US20130211080A1

    公开(公告)日:2013-08-15

    申请号:US13817012

    申请日:2011-08-25

    摘要: The present invention is directed to a process for the manufacture of 2,3,5-trimethyl-hydro-p-benzoquinone comprising the following steps: a) hydrogenating 2,6-dimethyl-p-benzoquinone with hydrogen in the presence of a hydrogenation catalyst in an organic solvent to obtain 2,6-dimethyl-hydro-p-benzoquinone; b) reacting 2,6-dimethyl-hydro-p-benzoquinone with a secondary amine and formal-dehyde in an organic solvent to obtain 2,6-dimethyl-3-(N,N-disubstituted aminomethyl)-hydro-p-benzoquinone; c) reacting 2,6-dimethyl-3-(N,N-disubstituted aminomethyl)-hydro-p-benzoquinone with hydrogen in the presence of a hydrogenolysis catalyst in an organic solvent to obtain 2,3,5-trimethylhydro-p-benzoquinone; wherein the organic solvent in all steps a), b) and c) is independently selected from the group consisting of methyl tert.-butyl ether, ethyl tert.-butyl ether, tert.-amyl ether, methoxycyclopentane and any mixtures thereof. Preferably the organic solvent used in all steps a), b) and c) is the same.

    摘要翻译: 本发明涉及一种制备2,3,5-三甲基 - 氢 - 对苯醌的方法,包括以下步骤:a)在氢化存在下用氢气氢化2,6-二甲基对苯醌 催化剂在有机溶剂中得到2,6-二甲基 - 氢 - 对苯醌; b)使2,6-二甲基 - 对苯醌与仲胺和正型脱水在有机溶剂中反应,得到2,6-二甲基-3-(N,N-二取代氨基甲基) - 氢对苯醌 ; c)在氢解催化剂存在下,在有机溶剂中使2,6-二甲基-3-(N,N-二取代氨基甲基) - 氢对苯醌与氢气反应,得到2,3,5-三甲基氢对 - 苯醌 其中所有步骤a),b)和c)中的有机溶剂独立地选自甲基叔丁基醚,乙基叔丁基醚,叔戊基醚,甲氧基环戊烷及其任何混合物。 在所有步骤a),b)和c)中使用的有机溶剂优选是相同的。