Purification of crude benzene

Claim 1

A PROCESS FOR THE PURIFICATION OF CRUDE BENZENE WITHOUT SUBSTANTIALLY CHANGING THE BENZENE WHICH COMPRISES SUBJECTING SAID BENZENE TO A TEMPERATURE BETWEEN ABOUT 180* C. AND ABOUT 450* C. IN THE PRESENCE OF HYDROGER CONTAINING GASES UNDER A PRESSURE BETWEEN ABOUT 20 ATMOSPHERES AND ABOUT 300 ATMOSPHERES AND IN THE PRESENCE OF A CATALYST OF THE SULFUR-INSENSITIVE TYPE COMPRISING AN ACTIVE ALUMINA CATALYST WHICH CONTAINS A COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXIDES AND SULFIDES OF METALS OF THE LEFT SIDE OF THE 6TH GROUP OF THE PERIODIC SYSTEM AND ALSO CONTAINS A COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXIDES AND SULFIDES OF METALS OF THE 8TH GROUP OF THE PERIODIC SYSTEM, WHICH CATALYST HAS BEEN PREPARED BY A PROCESS WHICH COMPRISES PRECIPITATING ALUMINA HYDRATE FROM A SOLUTION OF AN ALUMINUM COMPOUND, PEPTIZING THE PRECIPITATE SO OBTAINED, CALCINING THE PEPTIZING PRECIPITATE AT A TEMPERATURE IN EXCESS OF ABOUT 400* C., AND THEN APPLYING SAID COMPOUNDS TO THE ALUMINA THUS OBTAINED.