Adsorption-desorption process for the removal of minor amounts of solvent from the product streams of solventextracted naphthas

Claim 1

A HYDROCARBON SEPARATION METHOD COMPRISING A SELECTIVE SOLVENT EXTRACTION PROCESS INCLUDING CONTACTING CATALYTIC REFORMATE IN A PRIMARY EXTRACTION ZONE WITH PHENYLETHANOLAMINE TO SELECTIVELY EXTRACT THE AROMATIC COMPOUNDS OF SAID REFORMATE AND REMOVE THE MAJOR PART OF THE SOLVENT FROM THE EXTRACT BY RE-EXTRACTING SAID EXTRACT IN A SECONDARY EXTRACTION ZONE WITH A PREDOMINANTLY ALIPHATIC HYDROCARBON LIQUID BOILING WITHIN THE MOTOR GASOLINE RANGE TO FORM AN EXTRACT PRODUCT STREAM AND A RAFFINATE PRODUCT STREAM IN COMBINATION WITH A PROCESS FOR RECOVERING MINOR AMOUNTS OF PHENYLETHANOLAMINE FROM SAID PRODUCT STREAMS RESULTING FROM SAID SELECTIVE SOLVENT EXTRACTION PROCESS, COMPRISING THE STEPS OF PASSING EACH PRODUCT STREAM SEPARATELY AT A TEMPERATURE BELOW 250*F. THROUGH A BED OF MATERIAL SELECTIVELY ADSORBING SAID PHENYLETHANOLAMINE UNTIL SAID BED APPROACHES SATURATION, THEREAFTER PASSING SAID ALIPHATIC HYDROCARBON LIQUID THROUGH SAID BED TO REMOVE SAID PHENYLETHANOLAMINE FROM SAID BED THE RETURNING SAID ALIPHATIC HYDROCARBON AND DESORBED PHENYLETHANOLAMINE TO SAID SECONDARY EXTRACTION ZONE OF SAID SELECTIVE SOLVENT EXTRACTION PROCESS.