| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of producing (meth)acrylic acid which enables efficient acquisition of purified (meth)acrylic acid with a high purity.SOLUTION: A method of producing (meth)acrylic acid includes a process of introducing raw materials for production of (meth)acrylic acid into the first or the second reactor to obtain a gas containing (meth)acrylic acid, a process of introducing the gas containing (meth)acrylic acid from the first or the second reactor into the first or the second cooling tower to obtain a liquid containing (meth)acrylic acid, a process of introducing the liquid containing (meth)acrylic acid from the first cooling tower into a crystallizer, a process of introducing the liquid containing (meth)acrylic acid from the second cooling tower, optionally through the first cooling tower, into the crystallizer, a process of obtaining purified (meth)acrylic acid and a low-purity residual liquid of (meth)acrylic acid from the liquid containing (meth)acrylic acid having been introduced into the crystallizer, and a process of returning the residual liquid of (meth)acrylic acid to the first and/or the second cooling tower. |
