Purification of hydrogen peroxide

Claim 1

A PROCESS FOR PURIFYING AQUEOUS HYDROGEN PEROXIDE SOLUTION CONTAINING LOWER ALIPHATIC ALCOHOL, LOWER ALIPHATIC CARBONYL COMPOUND CORRESPONDING TO THE ALCOHOL, AND ORGANIC IMPURITIES COMPRISING OTHER OXYGENATED ORGANIC COMPOUNDS THAN THE ALCOHOL AND CARBONYL COMPOUND AND INCLUDING ORGANIC PEROXIDIC MATERIALS OF DIVERGENT VOLATILITIES AND STABILITIES, COMPRISING FRACTIONALLY AS OVERHEAD PRODUCT AN AQUEOUS MIXTUER OF LOWER ALIPHATIC ALCOHOL AND CORRESPONDING CARBONYL COMPOUND AND AS BOTTOMS PRODUCT AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE COMPRISING RESIDUAL ORGANCIS, IN A SEPARATE EVAPORATION ZONE PARTIALLY EVAPORATING SAID BOTTOMS PRODUCT TO YIELD VAPOROUR MIXTURE COMPRISING HYDROGEN PEROXIDE, WATER, AND RELATIVELY VOLATILE ORGANICES AND A LIQUID RESIDUE COMPRISING WATER, HYDROGEN PEROXIDE, AND RESIDUAL ORGANICS, IN A SECOND FRACTIONATING ZONE RECTIFYING SAID VAPOROUS MIXTURE TO YIELD AQUEOUS OVERHEAD FRACTION COMPRISING RELATIVELY VOLATILE ORGANICS AND AS LIQUID BOTTOMS FRACTION AN AQUEOUS HYDROGEN PEROXIDE SOLUTION COMPRISING RESIDUAL RELATIVELY VOLATILE ORGANICS, IN A FIRST STRIPPING ZONE CONVEYING SAID LIQUID BOTTOMS FRACTION COUNTERCURRENTLY TO A STREAM OF STREAM INTRODUCED THEREINTO SO AS TO VOLATILIZC ORGANIC IMPURITIES WITHOUT SUBSTANTIAL VOLATILIZATION OF HYDROCARBON PEROXIDE, INTRODUCING THE VAPOROUS EFFLUENT FROM SAID FIRST STRIPING ZONE INTO A SECOND STRIPPING ZONE AND THEREIN PASSING IT COUNTERCURRENTLY TO LIQUID RESIDUE CONVEYED FROM THE SAID EVAPORATION ZONE TO SAID SECOND STRIPPING ZONE TO YIELD AS OVERHEAD PRODUCT A MIXTURE OF WATER, HYDROGEN PEROXIDE AND VOLATILE ORGANICS AND AS LIQUID BOTTOMS AN AQUEOUS SOLUTION OF LESS VOLATILE ORGANICS, INTRODUCING THE OVERHEAD FRACTION FROM SAID SECOND STRIPPING ZONE INTO SAID EVAPORATION ZONE, AND WITHDRAWING PURIFIED AQUEOUS HYDROGEN PEROXIDE SOLUTION AS BOTTOMS PRODUCT OF SAID FIRST STRIPPING ZONE.