METHOD FOR SEPARATING MALEIC ANHYDRIDE FROM MALEIC ANHYDRIDE CONTAINING MIXTURES BY STRIPPING

摘要

THE INVENTION RELATES TO A PROCESS FOR THE SEPARATION OF MALEIC ANHYDRIDE FROM THE MALEIC ANHYDRIDE- CONTAINING REACTOR OFFGASES FROM THE PREPARATION OF MALEIC ANHYDRIDE BY THE OXIDATION OF HYDROCARBONS, IN WHICH THIS GAS STREAM IS BROUGHT INTO CONTACT WITH A HIGH- BOILING, INERT ABSORBENT FOR MALEIC ANHYDRIDE AND MALEIC ANHYDRIDE IS SEPARATED FROM THE RESULTANT LIQUID ABSORBATE PHASE BY VAPOR STRIPPING, WHERE THE STRIPPING AGENT USED IS AN ALCOHOL, AND AT LEAST SOME OF THE MALEIC ANHYDRIDE IS REACTED WITH THE ALCOHOL TO GIVE THE ESTER.