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公开(公告)号：SG54107A1
公开(公告)日：1998-11-16
申请号：SG1996000294
申请日：1996-01-18
Applicant: BASF AG
Inventor： HERBST HOLGER , HAMMON ULRICH , GERSTENKORN BERNHARD
Abstract: In the sepn. of (meth)acrylic acid (I) from mixts. contg. (I) as main prod. and lower aldehydes as by-prods. by rectification in a column with a distn. zone and a concn. zone, the mixt. is not supplied to the column directly. Instead, it is passed to a heated dwell vessel connected to the concn. zone, in which the mixt. is kept boiling, and the sump liquid from this vessel is fed to the column.
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