Process for preparing aromatic hydrocarbons

Claim 1

A PROCESS FOR PREPARING AROMATIC HYDROCARBONS CONTAINING LESS THAN TWELVE CARBON ATOMS, WHICH COMPRISES HEATING AN ALIPHATIC HYDROCARBON HAVING SUBSTANTIALLY TWELVE CARBON ATOMS, SAID ALIPHATIC HYDROCARBON BEING SELECTED FROM THE GROUP CONSISTING OF POLYMERIZATION PRODUCTS OF PROPYLENE, POLYMERIZATION PRODUCTS OF THE BUTYLENES, HYDROGENATION PRODUCTS THEREOF, MIXTURES THEREOF, MIXTURES OF SAID HYDROCARBONS WITH A LOWER POLYMER PRODUCT OF SAID OLEFINS AND HYDROGENATION PRODUCTS OF SUCH MIXTURES TO A TEMPERATURE RANGING BETWEEN ABOUT 400 AND 650*C. IN THE PRESENCE OF A SOLID OXIDIC CYCLISATION CATALYST CONTAINING AT LEAST 2 PERCENT OF A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CHROMIUM OXIDE, MOLYBDENUM OXIDE, AND TUNGSTEN OXIDE AND MIXTURES THEREOF, 0.1 TO 45 PERCENT OF A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF TITANIUM OXIDE, ZIRCONIUM OXIDE, THORIUM OXIDE, AND VANADIUM OXIDE AND MIXTURES THEREOF, AND ALUMINUM OXIDE WITHIN THE RANGE OF 0 TO 97.5 PERCENT, THE AMOUNT OF THE METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF CHROMIUM OXIDE, MOLYBDENUM OXIDE, AND TUNGSTEN OXIDE AND MIXTURES THEREOF BEING AT LEAST AT HIGH AS THAT OF ALL OTHER ACTIVE AND ACTIVATING ADDITIONS TOGETHER.