Patent ID: 6500998
Filing Date: 2002-12-31
Classification: B01J,C01B,C07C,Y02P

Abstract:
A transalkylation process comprising reacting under transalkylation reaction conditions a polyalkylated aromatic compound with a nonalkylated aromatic compound, wherein at least one alkyl group is transferred from the polyalkylated aromatic compound to the nonalkylated aromatic compound in the presence of a microporous crystalline zeolite having a composition in the as synthesized form on an anhydrous basis in terms of mole ratios of the elements of:Mmn+Rrp+Al(1âˆ’x)ExSiyOz where M is at least one exchangeable cation selected from the group consisting of alkali and alkaline earth metals, â€œmâ€  is the mole ratio of M to (Al+E) and varies from about 0 to about 1.2, R is a nitrogen-containing organic cation selected from the group consisting of protonated amines, protonated diamines, protonated alkanolamines, quaternary ammonium ions, diquaternaryammonium ions, quaternized alkanolamines and mixtures thereof, â€œrâ€  is the mole ratio of R to (Al+E) and has a value of about 0.25 to about 3.0, E is an element selected from the group consisting of Ga, Fe, In and Cr and B, â€œxâ€  is the mole fraction of E and varies from 0 to 0.5, â€œnâ€  is the weighted average valence of M and has a value of about +1 to about +2, â€œpâ€  is the weighted average valence of R and has a value of +1 to about +2, â€œyâ€  is the mole ratio of Si to (Al+E) and varies from about 5 to about 12 and â€œzâ€  is the mole ratio of O to (Al+E) and has a value determined by the equation: z=(mÂ·n+rÂ·p+3+4Â·y)/2 the zeolite characterized in that it has at least two x-ray diffraction peaks, one at a d-spacing of 3.9Â±0.12 Ã¥ and one at 8.6Â±0.2 Ã¥.