Alkylation-dealkylation process

Claim 1

IN A PROCESS FOR EFFECTING THE TRANSFER OF AN ALKYL GROUP FROM ONE AROMATIC NUCLEUS TO ANOTHER IN WHICH THE DONOR REAGENT IS A POLYSUBSTITUTED AROMATIC COMPOUND AT LEAST ONE SUBSTITUENT OF WHICH IS AN ALKYL GROUP REGENERATABLE AS AN OLEFIN AND THE ACCEPTOR REAGENT IS AN ALKYLATABLE AROMATIC COMPOUND, AND IN WHICH THE TRANSFER IS EFFECTED BY SUBJECTING A MIXTURE OF THE DONOR AND ACCEPTOR REAGENTS TO CATALYSIS OVER AN ALKYLATING-DEALKYLATION CATALYST, THE STEPS OF BRINGING A MIXTURE OF THE DONOR AND ACCEPTOR REAGENTS WHICH YIELD THE SAME PRODUCT THROUGH DEALKYLATION OF THE DONOR REAGENT AND ALKYLATION OF THE ACCEPTOR REAGENT AND IN WHICH THE PROPORTIONS ARE AT LEAST TWO AND ONE-HALF MOLS OF ACCEPTOR REGENT FOR EACH MOL PRODUCT EQUIVALENT OF THE DONOR REAGENT IN CONTACT WITH SAID CATALYST AT A REACTIVE TEMPERATURE BELOW ABOUT 450* C. WHILE MAINTAINING A PRESSURE BETWEEN ABOUT 15 AND 60 ATMOSPHERES.