Stable, catalytically active and coke selective zeolite

Details Stable, catalytically active and coke selective zeolite Stable, catalytically active and coke selective zeolite

B - Operations, Transporting

01

J

196/100, 252/5

B01J 29/08 (2006.01) C10G 11/02 (2006.01) C10G 11/05 (2006.01)

Patent

CA 1052365

Abstract of the Disclosure A stable rare earth exchanged zeolite having high catalytic activity and improved coke selectivity is pre- pared by a series of exchange steps whereby the rare earth is introduced into the zeolite in a multi-step e.g., two step manner. The method comprises exchanging a sodium zeolite to less that 4.0 weight percent Na2O, exchanging with rare earth to give an initial rare earth oxide content of 0.3 to 5 weight percent, calcining, and further rare earth exchanging the zeolite to give a final rare earth content of 1.0 to 10 weight percent.

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