Aromatic alkylation process using UZM-5 and UZM-6 aluminosilicates
AssigneeUop LLC
InventorsDeng-Yang Jan, Gregory J. Lewis, Jaime G. Moscoso, Mark A. Miller
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Abstract
A process for alkylation of aromatic compounds using a new family of related crystalline aluminosilicate zeolites has been developed. These zeolites are represented by the empirical formula: Mmn+Rrp+Al(1−x)ExSiyOz where M is an alkali or alkaline earth metal such as lithium and strontium, R is a nitrogen containing organic cation such as tetramethyl-ammonium and E is a framework element such as gallium.
Claims20
A process for monoalkylating aromatic compounds comprising reacting under alkylation conditions and under at least partial liquid phase conditions an olefin with an alkylatable aromatic compound in the presence of a catalyst to provide an alkylated compound, the catalyst comprising a crystalline aluminosilicate 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(1−x)ExSiyOz
- where M is at least one exchangeable cation selected from the group consisting of alkali and alkaline earth metals, “m” 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, “r” 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 Cr, In and B, “x” is the mole fraction of E and varies from 0 to 0.5, “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 +1 to about +2, “y” is the mole ratio of Si to (Al+E) and varies from about 5 to about 12 and “z” is the mole ratio of O to (Al+E) and has a value determined by the equation:
- z=(m·n+r·p+3+4·y)/2
- the zeolite characterized in that it has at least two x-ray diffraction peaks, one at a d-spacing of 3.9±0.12 Å and one at 8.6±0.2 Å.
A process for preparing cumene by the alkylation of benzene with propylene comprising reacting propylene with benzene at a temperature between about 90° C. and about 200° C. at a pressure sufficient to maintain at least a partial liquid phase in the presence of a catalyst comprising a crystalline aluminosilicate 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(1−x)ExSiyOz
- where M is at least one exchangeable cation selected from the group consisting of alkali and alkaline earth metals, “m” 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, “r” 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, Cr, In and B, “x” is the mole fraction of E and varies from 0 to 0.5, “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 +1 to about +2, “y” is the mole ratio of Si to (Al+E) and varies from about 5 to about 12 and “z” is the mole ratio of O to (Al+E) and has a value determined by the equation:
- z=(m·n+r·p+3+4·y)/2
- the zeolite characterized in that it has at least two x-ray diffraction peaks, one at a d-spacing of 3.9±0.12 Å and one at 8.6±0.2 Å.
Dependencies are inferred from the claim text.