PROCESS FOR PRODUCING (METH)ACRYLIC ACID WITH TREATMENT OF THE HIGH-BOILING FRACTION BY CRYSTALLISATION

• Main Authors: BALDUF, Torsten, MOSLER, Jürgen, SABBAGH, Andreas, SELBACH, Arndt, BUB, Günther, KOHN, Jürgen
• Format: Patent
• Language: English; French; German
• Published: 01.03.2017
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention relates to producing a superabsorbent polymer comprising (I) producing a (meth)acrylic acid comprising the steps of (a) synthesizing a crude (meth)acrylic acid phase; (b) distillatively working-up the crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase...