Process for production of alkyl benzenes

Claim 1

THE ALKYLATION OF BENZENE WITH AN OLEFIN IN THE PRESENCE OF HYDROFLUORIC ACID WHICH COMPRISES THE STEPS OF PASSING AN ADMIXTURE OF BENZENE AND A CATALYTICALLY PRODUCED PETROLEUM NAPHTHA BOILING IN THE RANGE 380* F.-450* F. INTO CONTACT, IN A PRIMARY ZONE, WITH HYDROFLUORIC ACID CATALYST, CONTAINING ABOUT 75% HYDROGEN FLUORIDE, ABOUT 15% WATER AND ABOUT 10% OF CATALYST SOLUBLE OIL, THE RATIO OF HYDROCARBON PHASE TO CATALYST PHASE BEING ABOUT 7.5 TO 1, FOR A TIME OF THE ORDER OF LESS THAN ONE MINUTE, AT A TEMPERATURE OF ABOUT 70* F.; SEPARATING SAID ADMIXTURE FROM SAID CATALYST AND PASSING IT TO A SECONDARY ZONE AND THEREIN CONTACTING IT WITH A HYDROFLUORIC ACID CATALYST, CONTAINING ABOUT 97% HYDROGEN FLUORIDE AND ABOUT 3% WATER, THE RATIO OF HYDROCARBON PHASE TO CATALYST PHASE BEING ABOUT 3 TO 1 FOR A TMIE OF THE ORDER OF ABOUT 1/3 HOUR AND AT A TEMPERATURE OF ABOUT 90* F., TO CAUSE THE ALKYLATION OF THE BENZENE TO A DESIRED EXTENT.