Patent ID: 7297829

Claim:
A process for producing a monoalkylaromatic compound comprising the steps of: (a) contacting an alkylation catalyst with mixture of steam and air at a temperature of up to about 1000° F. (538° C.), said alkylation catalyst comprising a porous crystalline inorganic oxide material of MCM-49 and 0.1 to about 0.5 weight percent phosphorous to produce a regenerated alkylation catalyst; (b) supplying a reactor with an alkylatabic alkylaromatic compound and an alkylating agent in the presence of said regenerated alkylation catalyst to produce said monoalkylaromatic compound under alkylation conditions; wherein said regenerated alkylation catalyst has a higher activity and higher selectivity towards said monoalkylaromatic compound than said regenerated alkylation catalyst that is unmodified by phosphorus under equivalent alkylation conditions.