Process for separation of hydrocarbons from more saturated hydrocarbons with ethylene diamine solvent

Claim 1

A PROCESS FOR THE PREPARATION OF DIOLEFINS COMPRISING CATALYTICALLY DEHYDROGENATING A NORMAL PARAFFIN TO FORM A MIXTURE OF PARAFFINS AND ALKENES, INTIMATELY CONTACTING SAID MIXTURE WITH ETHYLENE DIAMINE IN A FIRST EXTRACTION ZONE, WITHDRAWING RAFFINATE CONTAINING SAID PARAFFINS, WITHDRAWING AND PASSING SOLVENT ENRICHED WITH SAID ALKENES TO A SECOND EXTRACTION ZONE, PASSING A SECOND MIXTURE CONTAINING ALKENES TO SAID SECOND EXTRACTION ZONE, PASSING SELECTIVE SOLVENT TO SAID SECOND EXTRACTION ZONE, WITHDRAWING AND PASSING RAFFINATE CONTAINING MONOOLEFINS TO A SECOND CATALYTIC DEHYDROGENATION ZONE WHEREIN A SECOND MIXTURE COMPRISING MONO- AND DIOLEFINS ARE PRODUCED AND PASSED TO SAID SECOND EXTRACTION ZONE AS SAID SECOND MIXTURE, WITHDRAWING AND PASSING SOLVENT ENRICHED WITH DIOLEFINS AND CONTAINING SOME MONOOLEFINS TO AN EXTRACTIVE DISTILLATION ZONE, WITHDRAWING MONOOLEFINS AS OVERHEAD, WITHDRAWING SOLVENT ENRICHED WITH SAID DIOLEFINS AND PASSING SAME TO A STRIPPING ZONE, RECOVERING SAID DIOLEFINS AS OVERHEAD, AND REMOVING SOLVENT AS BOTTOMS PRODUCT FROM SAID STRIPPING ZONE.