| US 7,517,825 B2 | ||
| Aromatic transalkylation using a LZ-210 zeolite | ||
| Thomas M. Reynolds, Mobile, Ala. (US); Christopher J. Garrett, Mobile, Ala. (US); Deng-Yang Jan, Elk Grove Village, Ill. (US); Robert J. Schmidt, Barrington, Ill. (US); and Mathias P. Koljack, Gilberts, Ill. (US) | ||
| Assigned to UOP LLC, Des Planies, Ill. (US) | ||
| Filed on Jan. 12, 2007, as Appl. No. 11/622,925. | ||
| Prior Publication US 2008/0171901 A1, Jul. 17, 2008 | ||
| Int. Cl. B01J 29/06 (2006.01) | ||
| U.S. Cl. 502—60 [502/64; 502/79] | 22 Claims |
| 1. A process for producing a modified Y zeolite, comprising:
a) treating a Y zeolite with an aqueous solution of a fluorosilicate salt to give a first LZ-210 zeolite having a first bulk
Si/Al2 molar ratio and a first unit cell size;
b) hydrothermally steaming the first LZ-210 zeolite at a temperature of from about 550° C. to about 850° C. to produce a second
LZ-210 zeolite having a bulk Si/Al2 molar ratio about the same as the first bulk Si/Al2 molar ratio and having second unit cell size less than the first unit cell size,
c) contacting the second LZ-210 zeolite, with a sufficient amount of an aqueous solution of ammonium ions having a pH of less
than about 4 for a sufficient time to exchange at least some of the sodium cations in the second LZ-210 zeolite for ammonium
and hydrogen ions; and
d) producing a modified LZ-210 zeolite having a second bulk Si/Al2 molar ratio greater than the first bulk Si/Al2 ratio and ranging from about 6.5 to about 27,
wherein 63% to 95% of aluminum in the modified LZ-210 zeolite is framework aluminum.
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