Patent ID: 7420098
Filing Date: 2008-09-02
Classification: B01J,C07C,Y02P

Abstract:
1. A process for the catalytic alkylation of an aromatic substrate with an alkylating agent in first and second sequential alkylating zones, the process comprising: (a) contacting the aromatic substrate and the alkylating agent with a first catalyst in the first alkylation zone to obtain a first effluent, wherein the first catalyst comprises a microporous crystalline zeolite having a layered framework of AlO wherein M is at least one exchangeable cation, “m” is the mole ratio of M to (Al+E) and varies from 0 to about 2, R is at least one organoammonium cation selected from the group consisting of quaternary ammonium cations, diquaternary ammonium cations, protonated amines, protonated diamines, protonated alkanoamines and quaternized alkanolammonium cations, “r” is the mole ratio of R to (Al+E) and has a value of about 0.05 to about 5.0, “n” is the weighted average valence of M and has a value of about 1 to about 2, “p” is the weighted average valence of R and has a value of about 1 to about 2, E is an element selected from the group consisting of gallium, iron, boron, chromium, indium and mixtures thereof, “x” is the mole fraction of E and has a value from 0 to about 1.0, “y” is the mole ratio of Si to (Al+E) and varies from about 6.5 to about 35 and “z” is the mole ratio of 0 to (Al+E) and has a value determined by the equation: and (b) contacting at least a portion of the first effluent with a second catalyst comprising beta zeolite in the second alkylation zone at second alkylation conditions to obtain a second effluent comprising an alkylaromatic.