公开(公告)号：EP2433924A4

公开(公告)日：2014-05-14

申请号：EP10777668

申请日：2010-05-07

申请人： NIPPON CATALYTIC CHEM IND

发明人： ISHII YOSHITAKE ,  UENO KOJI

IPC分类号： C07C51/43 ,  B01D9/00 ,  C07C57/07

CPC分类号： B01D9/0013 ,  C07C51/43 ,  C07C57/04

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。

公开(公告)号：EP2394732A4

公开(公告)日：2013-05-22

申请号：EP10738438

申请日：2010-01-26

申请人： NIPPON CATALYTIC CHEM IND

发明人： UENO KOJI ,  SUZUKI KUNIHIKO ,  SUGANO ATSUSHI

IPC分类号： B01D65/06 ,  B01D65/02 ,  C07C51/42 ,  C07C51/487 ,  C07C57/04

CPC分类号： B01D65/02 ,  B01D2321/162 ,  B01D2321/164 ,  C07C51/487 ,  C07C57/04

公开(公告)号：EP2450338A4

公开(公告)日：2015-08-05

申请号：EP10794060

申请日：2010-06-24

申请人： NIPPON CATALYTIC CHEM IND

发明人： SAKAMOTO KAZUHIKO ,  UENO KOJI ,  ISHII YOSHITAKE ,  NAKAGAWA SATOSHI

IPC分类号： C07C51/43 ,  B01D9/00 ,  C07C57/04 ,  C07C57/07

CPC分类号： B01D9/0013 ,  B01D9/004 ,  C07C51/43 ,  C07C57/04

摘要： The objective of the present invention is to provide a process for production of (meth)acrylic acid with improved production efficiency by efficiently shifting from heating procedure to cooling procedure for a crystallizer. A process for production of (meth)acrylic acid according to the present invention is characterized in comprising the steps of crystallizing (meth) acrylic acid from a crude (meth) acrylic acid solution by using a batch type crystallizer, and melting the obtained (meth)acrylic acid crystal to obtain a (meth)acrylic acid melted liquid; wherein preliminary cooling of the crystallizer for the next crystallization step is started during transferring the (meth)acrylic acid melted liquid from the crystallizer.

公开(公告)号：EP2450341A4

公开(公告)日：2013-12-25

申请号：EP10794056

申请日：2010-06-24

申请人： NIPPON CATALYTIC CHEM IND

发明人： SAKAMOTO KAZUHIKO ,  UENO KOJI ,  ISHII YOSHITAKE ,  KITAURA MASATSUGU

IPC分类号： C07C51/47 ,  B01D9/00 ,  C07C51/43 ,  C07C57/07

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.

公开(公告)号：EP2450340A4

公开(公告)日：2015-08-05

申请号：EP10794063

申请日：2010-06-24

申请人： NIPPON CATALYTIC CHEM IND

发明人： SAKAMOTO KAZUHIKO ,  UENO KOJI ,  ISHII YOSHITAKE ,  KITAURA MASATSUGU

IPC分类号： C07C51/43 ,  B01D9/00 ,  B01D9/02 ,  C07C57/07

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.

公开(公告)号：EP2439186A4

公开(公告)日：2013-12-11

申请号：EP10783314

申请日：2010-05-27

申请人： NIPPON CATALYTIC CHEM IND

发明人： SAKAMOTO KAZUHIKO ,  UENO KOJI ,  ISHII YOSHITAKE ,  HIRAO HARUNORI ,  NAKAGAWA SATOSHI

IPC分类号： C07C51/43 ,  C07C51/50 ,  C07C57/07 ,  C07C57/075

CPC分类号： C07C51/43 ,  C07C57/04

摘要： PROBLEM There is provided a melting method of (meth)acrylic acid crystal which is capable of providing a higher quality of (meth)acrylic acid without carrying out an additional purification treatment to (meth)acrylic acid obtained by a crystallization operation accompanied by melting of (meth)acrylic acid. In addition, there is provided a simple method for adjusting a content of polymerization inhibitor in a product (meth)acrylic acid. SOLUTION In the crystallization method melting (meth)acrylic acid crystal while wetting with the crystalline molten liquid, a polymerization inhibitor is added to a molten liquid melted after initiation of melting, and all of crystal is melted while circulating and feeding the molten liquid containing said polymerization inhibitor to the crystal. In addition, a content of polymerization inhibitor in product (meth)acrylic acid is adjusted by adding a predetermined amount of polymerization inhibitor corresponding to a product specification to the molten liquid melted after initiation of melting.

摘要翻译： 问题本发明提供（甲基）丙烯酸晶体的熔化方法的所有其能够提供（甲基）丙烯酸的更高质量，而不进行额外的纯化处理，以（甲基）丙烯酸通过操作一个结晶获得的伴随熔化 （甲基）丙烯酸。 此外，提供了一种用于在产品中（甲基）丙烯酸调节聚合抑制剂的含量的简单方法。 溶液结晶方法熔融（甲基）丙烯酸晶体而与结晶熔融液体润湿剂，聚合抑制剂被加入到熔化的开始后熔熔融液体，并且所有晶体的同时循环并供给含有所述熔融液体被熔化 聚合抑制剂的晶体。 另外，在产物（甲基）丙烯酸聚合抑制剂的含量是通过添加聚合抑制剂的对应于一个产品说明书中对熔化的开始后熔熔融液体的预定量来调节。