Recovery of valuable dewaxing aids from waxes

Claim 1

A PROCESS FOR THE RECOVERY OF A WAX CRYSTALLIZATION AID SELECTED FROM THE GROUP CONSISTING OF A CONDENSATION PRODUCT OF A CHLORINATED PARAFFFIN WAX AND ANPTHALENE, A PRODUCT OF CONDENSATION OF PARAFFIN WAX AND AN AROMATIC HYDRCARBON, AND A POLYMERIZATION PRODUCT OF AN ESTER OF METHACYLIC ACID AND A FATTY ALCOHOL, PRESENT IN A WAX SEPARATED FROM A WAX-BEARING HYDROCARBON OIL BY SOLVENT DEWAXING EMPLOYING SAID WAX CRYSTALLIZTION AID, COMPRISING PASSING SAID WAX THROUGH A FIXED BED OF A SOLID ADSORBENT AT A TEMPERATURE OF AT LEAST 10*F. ABOVE THE MELTING POINT OF SAID WAX IN AN AMOUNT WITHIN THE LIMITS OF 0.1 TO 10 VOLUMES PER VOLUME OF SAID SOLID ADSORBENT, WHEREBY SAID CRYSTALLIZATION AID PRESENT IN SAID WAX IS ADSORBED BY SAID SOLID ADSORBENT AND A MINOR PORTION OF SAID WAX IS MECHANICALLY RETAINED ON SAID SOLID ADSORBENT, WASHING SAID WAX FROM THE SURFACE OF SAID ADSORBENT, SEPARATING ADSORBED CRYSTALIZATION AID FROM SAID SOLID ADSORBENT BY PASSING IN CONTACT THEREWITH A DESORBENT SOLVENT SELECTED FROM THE GROUP CONSISTING OF A SINGLE COM PONENT ORGANIC SOLVENT CONTAINING FROM 4 TO 10 CARBON ATOMS IN THE MOLECULE AND A FUNCTIONAL GROUP SELECTED FROM THE GROUP CONSISTING OF >C=O AND -OH, AND A MIXTURE OF POLAR AND NONPOLAR SOLVENTS, AND RECOVERING SAID CRYSTALLIZATION AID FROM SAID DESORBENT SOLVENT AS A PRODUCT OF THE PROCESS.