VERFAHREN ZUM ABTRENNEN SCHWER- ODER NICHTFLUECHTIGER NEBENPRODUKTE DER PROPYLEN- UND/ODER ACROLEINOXIDATION VON DEN FUER DIE ABSORBTION DER ACRYLSAEURE AUS DEN REAKTIONSGASEN VERWENDETEN LOESUNGSMITTELN

摘要

In the oxidation of propylene and/or acrolein, high-boiling or non-volatile byproducts are separated from the solvents used for absorbing the acrylic acid by treating the said solvents laden with byproducts with the hot reaction gases in such amounts that the major portion of the solvents evaporates, the residual solvent containing a high percentage of said byproducts then being discarded or worked up.