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    IMPROVED REFINING PROCESSES
    1.
    发明申请
    IMPROVED REFINING PROCESSES 审中-公开
    改进精炼工艺

    公开(公告)号：WO0185666A2

    公开(公告)日：2001-11-15

    申请号：PCT/US0114984

    申请日：2001-05-09

    Applicant: UNION CARBIDE CHEM PLASTIC

    Inventor： BOUDREAUX CHRIS NICHOLAS ,  KUO ALEX CHIAHUEI ,  LUCE STEVEN R ,  MANN TIMOTHY JOBE ,  HO FUNGAU

    IPC: C07C67/08 ,  C07C67/54 ,  C07C69/54

    CPC classification number: C07C67/08 ,  C07C67/54 ,  Y02P20/582 ,  C07C69/54

    Abstract: Crude C1-C8 alkyl (meth)acrylate streams, for example, from the reaction of butanol and (meth)acrylic acid, are refined using a splitter distillation column to yield a C1-C8 alkyl (meth)acrylate- and heavies-containing bottoms fraction and an overhead fraction containing C1-C8 alkyl acetate, C1-C8 alcohol and C1-C8 alkyl (meth)acrylate. A stream comprising a water miscible organic solvent is introduced into the splitter distillation column in an amount sufficient to prevent the formation of water layers in the splitter distillation column and thereby reduce fouling in the splitter distillation column. The bottoms fraction is then subjected to separation, for example, by distillation, to separate heavies from the bottoms fractions and to recover C1-C8 alkyl (meth)acrylate.

    Abstract translation: 使用分离式蒸馏塔精制例如来自丁醇和（甲基）丙烯酸的粗制C1-C8烷基（甲基）丙烯酸酯流，得到（甲基）丙烯酸C 1 -C 8烷基酯和重质含有底物 馏分和含有C 1 -C 8烷基乙酸酯，C 1 -C 8醇和（甲基）丙烯酸C 1 -C 8烷基酯的塔顶馏分。 将包含水混溶性有机溶剂的料流以足以防止分离器蒸馏塔中的水层形成从而减少分离器蒸馏塔中的结垢而引入分离器蒸馏塔中。 然后将塔底馏分例如通过蒸馏分离，从塔底馏分中分离出重质物并回收（甲基）丙烯酸C 1 -C 8烷基酯。

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