Patent ID: 8865958
Filing Date: 2014-10-21
Classification: C07C,Y02P

Abstract:
1. A method of producing an alkylaromatic by the alkylation of an aromatic with an alkylating agent, the method comprising: providing a preliminary alkylation system containing a preliminary alkylation catalyst, wherein the preliminary alkylation catalyst comprises a first mixed catalyst load that includes a portion of a regenerated H-beta zeolite catalyst and at least one other catalyst; providing an alkylation reactor having at least one reaction zone, wherein the at least one reaction zone contains an alkylation catalyst, wherein the alkylation reactor is in fluid communication with the preliminary alkylation system and wherein the alkylation catalyst comprises a second mixed catalyst load that includes a portion of the regenerated H-beta zeolite catalyst and at least one other catalyst, wherein the mixed catalyst loads are layerings of various catalysts or a physical mixings of the various catalysts, and wherein the preliminary alkylation catalyst and the alkylation catalyst are the same; introducing a feed stream comprising an aromatic and an alkylating agent to the preliminary alkylation system; and reacting at least a portion of the aromatic under alkylation conditions in the at least one reaction zone to produce an alkylaromatic; wherein the regenerated H-beta zeolite catalyst is produced by heating an at least partially deactivated H-beta zeolite catalyst to a series of temperatures ranging from about 200° C. to about 500° C., said heating comprising: heating the at least partially deactivated H-beta zeolite catalyst to a first temperature with a gas containing nitrogen and 2 mol % or less oxygen for a period of time for a time sufficient to provide an output stream having an oxygen content of about 0.1 mol %; heating up the at least partially deactivated H-beta zeolite catalyst at a second temperature higher than the first temperature for a period of time sufficient to provide an output stream having a certain oxygen content.