发明申请
- 专利标题: PROCESS FOR PRODUCING (METH) ACRYLIC ACID
- 专利标题(中): 生产(甲基)丙烯酸的方法
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申请号: US13147643申请日: 2010-01-29
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公开(公告)号: US20110319661A1公开(公告)日: 2011-12-29
- 发明人: Kazuhiko Sakamoto , Koji Ueno , Yoshitake Ishii , Takashi Sugimoto , Masatsugu Kitaura , Satoshi Nakagawa , Kunihiko Suzuki
- 申请人: Kazuhiko Sakamoto , Koji Ueno , Yoshitake Ishii , Takashi Sugimoto , Masatsugu Kitaura , Satoshi Nakagawa , Kunihiko Suzuki
- 优先权: JP2009-022475 20090203; JP2009-151293 20090625
- 国际申请: PCT/JP2010/051261 WO 20100129
- 主分类号: C07C51/43
- IPC分类号: C07C51/43
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.
公开/授权文献
- US08680330B2 Process for producing (meth) acrylic acid 公开/授权日:2014-03-25