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    YIELD-EFFICIENT PROCESS FOR THE PRODUCTION OF HIGHLY PURE 2-METHYL-1,4-NAPHTHOQUINONE AND ITS DERIVATIVES
    4.
    发明申请
    YIELD-EFFICIENT PROCESS FOR THE PRODUCTION OF HIGHLY PURE 2-METHYL-1,4-NAPHTHOQUINONE AND ITS DERIVATIVES 失效
    用于生产高纯度2-甲基-1,4-萘醌及其衍生物的有效方法

    公开(公告)号：US20110263904A1

    公开(公告)日：2011-10-27

    申请号：US13004629

    申请日：2011-01-11

    申请人： Kamyab Amouzegar ,  Behzad Mahdavi ,  Charles Didier ,  Alexander Lieb ,  Mathieu Langevin

    发明人： Kamyab Amouzegar ,  Behzad Mahdavi ,  Charles Didier ,  Alexander Lieb ,  Mathieu Langevin

    IPC分类号： C07C46/02

    CPC分类号： C07C46/04 ,  C07C46/08 ,  C07C50/12

    摘要： The present invention discloses a process for the production of 2-methyl-1,4-naphthoquinone and its bisulfite adducts, comprising the following steps: a) oxidizing 2-methyl-naphthalene (2-MNA) to achieve an organic phase containing 2-methyl-naphthoquinone (2-MNQ) and 6-methyl-naphthoquinone (6-MNQ); b) subjecting said organic phase to treatment with an aqueous solution of a bisulfite salt to extract preferentially the 6-MNQ isomer from the organic phase; c) separating said organic phase from the aqueous phase; d) subjecting the organic phase of process step c) to a second bisulfidation step with an aqueous solution of a bisulfite salt, resulting in an organic phase containing 2-MNA and trace amounts of 2-MNQ and an aqueous phase containing 2-MSB and trace amounts of 6-MSB; e) optionally removing interfering bisulfite ions from the aqueous phase of process step c); f) raising the pH of the aqueous phase from step c) or e) to higher than 8.5 in the presence of a solvent resulting in an organic phase containing 2-MNQ; g) combining the organic phase from step f) with the organic phase being treated in the process step d); h) recycling the organic phase from step d) back to step a) to be used as solvent for the oxidation reaction of 2-MNA.

    摘要翻译： 本发明公开了一种2-甲基-1,4-萘醌及其亚硫酸氢盐加合物的制备方法，包括以下步骤：a）氧化2-甲基 - 萘（2-MNA）以获得含2- 甲基萘醌（2-MNQ）和6-甲基萘醌（6-MNQ）; b）使用亚硫酸氢盐水溶液对所述有机相进行处理，从有机相中优先提取6-MNQ异构体; c）将所述有机相与水相分离; d）将工艺步骤c）的有机相用亚硫酸氢盐水溶液进行第二次双硫化步骤，得到含有2-MNA和痕量2-MNQ的有机相和含有2-MSB的水相和 痕量6-MSB; e）任选地从工艺步骤c）的水相中除去干扰亚硫酸氢盐离子; f）在溶剂存在下将水相的pH从步骤c）或e）提高至高于8.5，导致含有2-MNQ的有机相; g）将步骤f）中的有机相与方法步骤d）中待处理的有机相结合; h）将步骤d）中的有机相再循环到步骤a）以用作2-MNA的氧化反应的溶剂。

    Oxidative dehalogenation process for the production of perchlorinated quinones
    8.
    发明授权
    Oxidative dehalogenation process for the production of perchlorinated quinones 失效
    用于生产过氯醌的氧化脱卤法

    公开(公告)号：US5329027A

    公开(公告)日：1994-07-12

    申请号：US980405

    申请日：1992-11-24

    申请人： Gabriel Gojon-Zorrilla ,  Ignacio Villanueva-Fierro ,  Antonio Hinojosa-Martinez

    发明人： Gabriel Gojon-Zorrilla ,  Ignacio Villanueva-Fierro ,  Antonio Hinojosa-Martinez

    IPC分类号： C07C46/02 ,  C07C46/06 ,  C07C50/24

    CPC分类号： C07C46/02 ,  C07C46/06

    摘要： The present invention relates to an improved process for the production of perchlorinated quinones by oxidative dehalogenation comprising the steps of providing a stoichiometric mixture consisting of sulfur trioxide, sulfuric acid and at least one aromatic compound containing one or more unsaturated carbon-rings therein. The mixture is reacted with a stoichiometric quantity of chlorine by slowly adding the chlorine to the mixture while stirring. After a sufficient reaction time the resultant perchlorinated quinone product is recovered from the reacted mixture.

    摘要翻译： 本发明涉及通过氧化脱卤化生产过氯醌的改进方法，包括提供由三氧化硫，硫酸和至少一种含有一个或多个不饱和碳环的芳族化合物组成的化学计量混合物的步骤。 通过在搅拌下向混合物中缓慢加入氯使混合物与化学计量的氯反应。 在足够的反应时间后，从反应混合物中回收得到的全氯代醌产物。