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    PROCESS FOR PRODUCTION OF (METH)ACRYLIC ACID
    1.
    发明公开
    PROCESS FOR PRODUCTION OF (METH)ACRYLIC ACID 审中-公开
    HERSTELLUNGSVERFAHRENFÜR（METH）ACRYLSÄURE

    公开(公告)号：EP2394978A4

    公开(公告)日：2013-12-25

    申请号：EP10738477

    申请日：2010-01-29

    申请人： NIPPON CATALYTIC CHEM IND

    发明人： SAKAMOTO KAZUHIKO ,  UENO KOJI ,  ISHII YOSHITAKE ,  SUGIMOTO TAKASHI ,  KITAURA MASATSUGU ,  NAKAGAWA SATOSHI ,  SUZUKI KUNIHIKO

    IPC分类号： C07C51/43 ,  C07C57/07

    CPC分类号： C07C51/43 ,  C07C57/04

    摘要： A process for producing (meth)acrylic acid of the present invention comprises the steps in the following order: a crystallization step of supplying a cooling medium cooled by a heat source device to a crystallizer to obtain a (meth)acrylic acid crystal from a crude (meth)acrylic acid solution; an adjustment step of returning the cooling medium discharged from the crystallizer to the crystallizer without cooling; a sweating step of supplying a heating medium to the crystallizer to partially melt the (meth)acrylic acid crystal, thereby obtaining a melted liquid, and discharging the melted liquid from the crystallizer; and a melting step of supplying the heating medium to the crystallizer to melt the (meth)acrylic acid crystal, thereby obtaining purified (meth)acrylic acid. According to the present invention, purified (meth)acrylic acid with high purity can be obtained.

    摘要翻译： 本发明的（甲基）丙烯酸的制造方法包括以下步骤：将由热源装置冷却后的冷却介质供给至结晶器，从原料中得到（甲基）丙烯酸结晶的结晶工序 （甲基）丙烯酸溶液; 调整步骤，将从结晶器排出的冷却介质不冷却地返回结晶器; 向结晶器供应加热介质以部分熔化（甲基）丙烯酸晶体，从而获得熔融液体并从结晶器排出熔融液体的发汗步骤; 以及将加热介质供给至结晶器以熔化（甲基）丙烯酸晶体，由此获得纯化的（甲基）丙烯酸的熔融步骤。 根据本发明，可以获得高纯度的纯化（甲基）丙烯酸。