发明名称 |
Method for producing (meth)acrylic acid |
摘要 |
The present invention provides a method for suppressing an undesirable polymerization reaction of (meth)acrylic acid in a purification step for producing (meth)acrylic acid and for avoiding troubles due to clogging of devices or the like, to thereby attain a stable continuous operation. The present invention provides a method for producing (meth)acrylic acid comprising: distilling a water-containing liquid of (meth)acrylic acid containing (meth)acrylic acid and water by using a distillation column in the presence of an azeotropic solvent boiling together with at least water to remove water from the water-containing liquid of (meth)acrylic acid through azeotropy with the azeotropic solvent, in which the water-containing liquid of (meth)acrylic acid is distilled in the presence of the azeotropic solvent after distillation by the azeotropic solvent is carried out in the distillation column.
|
申请公布号 |
US2007055079(A1) |
申请公布日期 |
2007.03.08 |
申请号 |
US20060508247 |
申请日期 |
2006.08.23 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
YADA SHUHEI;TAKASAKI KENJI;SUZUKI YOSHIRO;OGAWA YASUSHI |
分类号 |
C07C51/42;C07C51/46;C07C57/07 |
主分类号 |
C07C51/42 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|