hachmuth

Claim 1

A PROCESS FOR RESOLVING A MIXTURE OF NITROGEN BASES WHICH HAVE UNSATURATED SUBSTITUENTS THEREON AND NITROGEN BASES WHICH HAVE SATURATED SUBSTITUENTS THEREON, WHICH HAVE DIFFERENT PH VALUES, WHICH FORM AQUEOUS AND ORGANIC PHASES WITH WATER AND WHEREIN THE MORE BASIC NITROGEN BASE IN SAID MIXTURE IS AT LEAST AS WATER-SOLUBLE AS THE LESS BASIC NITROGEN BASE IN SAID MIXTURE, WHICH COMPRISES SUBJECTING SAID MIXTURE TO SOLVENT EXTRACTION BY CONTACTING THE MIXTURE OF NITROGEN BASES WITH WATER HAVING CARBON DIOXIDE DISSOLVED THEREIN TO FORM A NONAQUEOUS PHASE RICHER IN THE LESS BASIC NITROGEN BASE ON A SOLVENT-FREE BASIS THAN THE INITIAL MIXTURE AND AN AQUEOUS PHASE RICHER IN THE MORE BASIC NITROGEN BASE ON A SOLVENT-FREE BASIC THAN THE INITIAL MIXTURE, WITHDRAWING NONAQUEOUS PHASE AS RAFFINATE, RECOVERING SAID RAFFINATE FROM SOLVENT, WITHDRAWING AQUEOUS PHASE AS EXTRACT, LIBERATING A PORTION OF THE CARBON DIOXIDE FROM SAID EXTRACT TO FORM A WATER-RICH PHASE OF SAID EXTRACT AND A PHASE RICH IN SAID NITROGEN BASES, THE LAST-MENTIONED PHASE OF SAID EXTRACT PROVIDING REFLUX FOR SAID EXTRACTION, SUBSEQUENTLY LIBERATING REMAINING CARBON DIOXIDE FROM SAID WATER RICH PHASE OF SAID EXTRACT TO FORM AN ORGANIC PHASE AND AN AQUEOUS PHASE, AND RECOVERING THE LAST-MENTIONED ORGANIC PHASE AS A PRODUCT.