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    2-(&ohgr;-alkoxycarbonyl alkanoyl)-4-butanolide
    1.
    发明授权
    2-(&ohgr;-alkoxycarbonyl alkanoyl)-4-butanolide 失效
    2-（ω-烷氧基羰基烷酰基）-4-丁醇

    公开(公告)号：US06222049B1

    公开(公告)日：2001-04-24

    申请号：US09103324

    申请日：1998-06-23

    申请人： Tetsuya Katou ,  Go Hata ,  Takeaki Etoh ,  Nobuhiko Ito

    发明人： Tetsuya Katou ,  Go Hata ,  Takeaki Etoh ,  Nobuhiko Ito

    IPC分类号： C07D30758

    CPC分类号： C07D307/33 ,  C07C51/09 ,  C07C51/377 ,  C07C59/01

    摘要： 2-(&ohgr;-alkoxycarbonyl alkanoyl)-4-butanolide is produced with a high selectivity and yield through condensation reaction of Y-butyrolactone with a readily available, low-price dicarboxylate as represented by the following general formula: ROOC(CH2)nCOOR wherein n denotes an integer of 8-13, and R denotes an alkyl group or an alkenyl group.

    摘要翻译： 通过γ-丁内酯与容易获得的低价二羧酸酯的缩合反应，通过下列通式表示，可以高选择性和高产率制备2-（ω-烷氧基羰基烷酰基）-4-丁醇酯：其中n表示 8-13，R表示烷基或烯基。

    Process to afford gamma butyrolactone and tetrahydrofuran
    4.
    发明授权
    Process to afford gamma butyrolactone and tetrahydrofuran 失效
    提供γ-丁内酯和四氢呋喃的方法

    公开(公告)号：US06433193B1

    公开(公告)日：2002-08-13

    申请号：US09831403

    申请日：2001-08-01

    申请人： Aldo Bertola ,  Take Constantinescu ,  Philippe Raucq ,  Salvatore Cassarino

    发明人： Aldo Bertola ,  Take Constantinescu ,  Philippe Raucq ,  Salvatore Cassarino

    IPC分类号： C07D30758

    CPC分类号： C07D315/00 ,  C07D307/08

    摘要： A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane. The process consists essentially of the following steps: A) converting n-butane to maleic anhydride by catalytic vapor phase oxidation; B) recovering maleic anhydride from the effluent gases of butane oxidation by selective absorption in gamma butyrolactone, forming a maleic anhydride-gamma butyrolactone mixture; C) removing water from the maleic anhydride-gamma butyrolactone mixture in a stripper under the action of a gas and/or under vacuum conditions, producing a maleic anhydride-gamma butyrolactone mixture with minimum water and maleic acid content; D) recovering gamma butyrolactone contained in the exhaust gases leaving the maleic anhydride absorber, by absorption in water; E) dehydrating the recovered gamma butyrolactone and recycling it to the maleic anhydride absorber; F) hydrogenating the dewatered maleic anhydride-gamma butyrolactone mixture, over suitable catalyst (s), under conditions favouring the formation of tetrahydrofuran and gamma butyrolactone; G) separating by distillation tetrahydrofuran, gamma butyrolactone and the by-products from the resulting hydrogenation mixture; H) recycling a gamma butyrolactone rich stream to the selective absorption of maleic anhydride.

    摘要翻译： 从正丁烷转化过程中回收的马来酸酐氢化生产四氢呋喃和γ-丁内酯的方法。 该方法基本上由以下步骤组成：A）通过催化气相氧化将正丁烷转化为马来酸酐; B）通过在γ-丁内酯中选择性吸收从丁烷氧化废气中回收马来酸酐，形成马来酸酐-γ丁内酯混合物; C）在气体和/或在真空条件下，在汽提器中从马来酸酐-γ-丁内酯混合物中除去水，产生具有最低水和马来酸含量的马来酸酐-γ-丁内酯混合物; D）通过吸收在水中回收离开马来酸酐吸收剂的废气中所含的γ-丁内酯; E）使回收的γ-丁内酯脱水并将其再循环到马来酸酐吸收剂; F）在有利于形成四氢呋喃和γ-丁内酯的条件下，通过合适的催化剂使脱水的马来酸酐-γ-丁内酯混合物氢化; G）通过蒸馏四氢呋喃，γ-丁内酯和副产物从所得氢化混合物中分离; H）将富含γ-丁内酯的物流循环至马来酸酐的选择性吸收。