| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing acrylic acid in high yield while preventing polymerization by keeping a purification condition of the acrylic acid within a prescribed range. SOLUTION: The acrylic acid is produced in high yield while preventing the formation of a polymer of the acrylic acid by using a single reactor, regulating a propylene concentration in a mixed gas introduced to a step for obtaining acrolein from propylene so as to be 7-15 vol.%, and a water concentration in the mixed gas so as to be 0-10 vol.%, collecting the obtained acrylic acid-containing gas by an acrylic acid-collecting column, and regulating the water content of a bottom liquid from the collecting column so as to be 1-45 wt.% to reduce the complexity of the following treating step. COPYRIGHT: (C)2004,JPO
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