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1.发明公开DEVICE FOR CRYSTALLIZING ACRYLIC ACID AND METHOD FOR CRYSTALLIZING ACRYLIC ACID USING SAME 审中-公开DEVICE丙烯酸和方法，丙烯酸，以便结晶结晶
公开(公告)号：EP2450341A4
公开(公告)日：2013-12-25
申请号：EP10794056
申请日：2010-06-24
CPC分类号： B01D9/0013 , B01D9/004 , B01D9/0045 , C07C51/43 , C07C57/04
摘要： PROBLEM An object of the present invention is to provide a crystallization unit capable of producing a purified acrylic acid having high purity efficiently. SOLUTION The present invention provides a crystallization unit to separate an acrylic acid-containing solution into a mother liquid and a purified acrylic acid, wherein the crystallization unit comprises a crystallizer having an exit to take out the mother liquid and the purified acrylic acid alternately; a supply line to supply the acrylic acid-containing solution to the crystallizer; and a recovery line to recover the mother liquid and the purified acrylic acid alternately from the crystallizer which is connected to the exit, and wherein the recovery line is equipped with an opening and closing unit consisting of a ball valve or a gate valve.
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公开(公告)号：EP2450340A4
公开(公告)日：2015-08-05
申请号：EP10794063
申请日：2010-06-24
CPC分类号： B01D9/0013 , B01D9/0063 , C07C51/43 , C07C57/04
摘要： The objective of the present invention is to provide a crystallization device and a crystallization process for obtaining (meth) acrylic acid with higher purity without causing leakage of a crude solution by preventing complete clogging in a crystallization tube from occurring. The device for crystallizing (meth)acrylic acid according to the present invention is characterized in comprising a crude (meth)acrylic acid solution supply part, a crystallization tube, a heat medium supply tube, a heat medium discharge tube, a storage part of a crude (meth)acrylic acid solution passed through the crystallization tube, a tube for circulating and supplying the crude (meth)acrylic acid solution to the supply part from the storage part, and a pump for circulating and supplying the crude (meth) acrylic acid solution to the supply part from the storage part; and further comprising a pressure meter in the circulate-supply tube; wherein the device is used for carrying out dynamic crystallization in a batch manner by circulating the crude (meth)acrylic acid solution to flow the crude solution downward along the inner wall of the crystallization tube in a coating film-like state.
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公开(公告)号：EP2394978A4
公开(公告)日：2013-12-25
申请号：EP10738477
申请日：2010-01-29
发明人： SAKAMOTO KAZUHIKO , UENO KOJI , ISHII YOSHITAKE , SUGIMOTO TAKASHI , KITAURA MASATSUGU , NAKAGAWA SATOSHI , SUZUKI KUNIHIKO
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。
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