Stabilization of mixtures of maleic anhydride and acrylic acid d

Details Stabilization of mixtures of maleic anhydride and acrylic acid d Stabilization of mixtures of maleic anhydride and acrylic acid d

1992-11-09

1994-06-07

Tsang, Cecilia

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

203 8, 203 9, C07D30736

Patent

active

053191064

ABSTRACT:
In the production of maleic anhydride, a crude maleic anhydride is produced which contains acrylic acid and other by-products. The crude maleic anhydride is dissolved in a solvent and the acrylic acid is distilled off. To avoid the polymerization of the acrylic acid, an inhibitor of phenothiazine is added to the distillation process.

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