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公开(公告)号：DE19627679A1
公开(公告)日：1998-01-15
申请号：DE19627679
申请日：1996-07-10
Applicant: BASF AG
Inventor： LEHNERT KLAUS , NESTLER GERHARD DR , ECK BERND , MUELLER-ENGEL KLAUS JOACHIM DR
IPC: C07C57/04 , C07C51/43 , C07C57/07 , C07C57/075
Abstract: The invention concerns a process for purifying by crystallization crude acrylic acid containing dibenzo-1,4-thiazine, the diacrylic acid content of the crude acrylic acid being set at a higher value before crystallization.
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