Process for the fractional separation of (meth)acrylic acid...

Details Process for the fractional separation of (meth)acrylic acid... Process for the fractional separation of (meth)acrylic acid...

C - Chemistry, Metallurgy

07

C

C07C 57/07 (2006.01) C07C 51/44 (2006.01)

Patent

CA 2166917

A process for the fractional separation of (meth)acrylic acid from a mixture containing (meth)acrylic acid, in which (meth)acrylic acid is tapped off from the rectifying column at a point above the level at which the liquid mixture containing (meth)acrylic acid enters the rectifying column, and at at least one point of the rectifying column the reflux liquid descending therein is tapped off from the rectifying column, oligomerized and/or polymerized (meth)acrylic acid present therein is separated and the reflux liquid is subsequently recycled to the rectifying column.

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