Patent ID: 7189872
Filing Date: 2007-03-13
Classification: B01D,C07C

Abstract:
1. A process for producing (meth)acrylic acid, which comprises purifying a (meth)acrylic acid-containing material to be purified, wherein said purifying comprises distilling said (meth)acrylic acid containing material in a distillation column, wherein during a cut operation in which a production rate of (meth)acrylic acid is reduced by α% relative to a production rate of (meth)acrylic acid prior to said cut operation, a liquid/gas flow rate in the distillation column is adjusted to be at least (100−α/2)% of the liquid gas flow rate prior to said cut operation, wherein a fluctuation margin of a heat load on a reboiler of the distillation column prior to said cut operation is a fluctuation margin such that proportions X