Process for purifying crude acrylic acid by crystallization

Details Process for purifying crude acrylic acid by crystallization Process for purifying crude acrylic acid by crystallization

C - Chemistry, Metallurgy

07

C

C07C 57/07 (2006.01) C07C 51/43 (2006.01)

Patent

CA 2250806

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.

L'invention concerne un procédé de purification d'acide acrylique brut contenant de la dibenzo-1,4-thiazine, par cristallisation, selon lequel la teneur en acide diacrylique de l'acide acrylique brut est ajustée à une valeur très élevée avant l'étape de cristallisation.

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