METHOD OF SEPARATING THE ACRYLIC ACID FROM BENZOIC ACID CONTAINED IN A PRODUCT GAS MIXTURE FROM A HETEROGENEOUSLY CATALYZED GAS PHASE PARTIAL OXIDATION OF A C3-PRECURSOR COMPOUND OF ACRYLIC ACID

摘要

Abstract A process for separating acrylic acid and benzoic acid present in the product gas mixture of a partial oxidation to acrylic acid, in which the acrylic acid and the benzoic acid are first converted to a liquid phase, constituents having a lower boiling point than benzoic acid and acrylic acid are removed therefrom by thermal separating processes, and the acrylic acid is removed by crystallization from the remaining liquid phase