Patent ID: 9199892
Filing Date: 2015-12-01
Classification: C07C,C10G,Y02P

Abstract:
1. In a process for catalytic conversion of a feedstock comprising at least one alkylatable aromatic compound comprising benzene and an alkylating agent comprising ethylene or propylene to form a conversion product comprising an alkylaromatic compound, the process comprising the step of contacting said feedstock in at least partial liquid phase under catalytic conversion conditions including a reactor outlet pressure and an alkylating agent feed supply pressure, with a catalyst composition comprising a porous crystalline material having a MWW structure selected from the group consisting of MCM-22, MCM-36, MCM-49, MCM-56, ITQ-1, ITQ-2, ITQ-30, PSH-3, SSZ-25, ERB-1, UZM-8, UZM-8HS and mixtures thereof, the improvement comprising the steps of: (a) modifying said catalyst composition to have a Relative Activity measured as an RA (i) increasing the zeolite content of said catalyst composition or steaming the catalyst composition to increase the Alpha Value, or (ii) decreasing the zeolite content of said catalyst composition or steaming the catalyst composition to decrease the Alpha Value; and (b) lowering said reactor pressure to about 370 psig (3102 kPa) or less or said alkylating agent feed supply pressure from about 370 psig (3102 kPa) or less, wherein said Relative Activity is the percent temperature rise in an adiabatic pipe reactor having one or more thermocouples divided by the percentage bed length based on the position of said thermocouples in said reactor.