Alkylation process

Claim 1

THE PROCESS OF SELECTIVELY ALKYLTING AN AROMATIC HYDROCARBON WITH AN OLEFIN HAVING MORE THAN 2 CARBON ATOMS IN THE PRESENCE OF ETHYLENE BY (1) BRINGING INTO INITIAL INTIMATE CONTACT AROMATIC HYDROCARBON HAVING INTO 1 TO 6 SIX-MEMBERED AROMATIC RINGS AND FROM 0 TO 10 NON-AROMATIC HYDROCARBYL SUBSTITUENTS, SAID SUBSTITUENTS INDEPENDENTLY HAVING FROM 1 TO 8 CARBON ATOMS, AND HYDROCARBON MONOOLEFIN HAVING MORE THAN 2 CARBON ATOMS, BUT NO MORE THAN 12 CARBON ATOMS, IN CONTACT WITH A CATALYTIC AMOUNT OF ALKYL ALUMINUM DICHLORIDE WHEREIN THE ALKYL IS ALKYL OF 1 TIO 8 CARBON ATOMS; AND (2) BRINGING INTO SUBSEQUENT CONTINUED INITIMATE CONTACT SAID AROMATIC HYDROCARBON WITH A MUXTURE OF SAID OLEFIN AND ETHYLENE IN CONTACT WITH SAID ALKYL ALYMINUM CHLORIDE AT A TEMPERATURE FROM ABOUT -10*C. TO ABOUT 120*C AND A PRESSURE FROM ABOUT 0.1 ATMOSPHERE TO ABOUT 50 ATMOSPHERES, IN THE LIQUID PHASE, TO SELECIVELY ALKYLATE SAID AROMATIC HYDROCARBON WITH SAID OLEFIN TO THE SUBSTANTIAL EXCLUSION OF THE ALKYLATION OF SAID AROMATIC HYDROCARBON WITH ETHYLENE.