Patent ID: 8242041
Filing Date: 2012-08-14
Classification: B01J,C07C

Abstract:
1. A method for impregnating a molecular sieve primary catalyst with an aromatic co-catalyst, the method comprising: contacting the molecular sieve primary catalyst having a porous framework structure with a combination of from at least 50 wt % to about 99.9 wt % of an aromatic co-catalyst and from about 0.1 wt % to less than 50 wt % of a polar impregnation agent containing one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, phosphorus, and boron, under conditions sufficient to impregnate the porous framework structure of the primary catalyst with the aromatic co-catalyst, thus forming an integrated catalyst system, removing at least a portion of the polar impregnation agent from the porous framework structure by further thermally treating the integrated catalyst system at a treatment temperature from about 275° C. to about 500° C., but higher than the temperature sufficient to impregnate the porous framework structure, for a treatment time of at least about 10 minutes; wherein the molecular sieve primary catalyst (i) has an 8-membered ring porous framework structure, (ii) has a porous framework structure that is defined by a pore size not greater than 5.0 Angstroms and that exhibits an AEI framework type, a CHA framework type, or both, or (iii) has both (i) and (ii); and wherein the integrated catalyst system contains within its porous framework structure at least 85 wt % of the aromatic co-catalyst and not more than 15 wt % of the polar impregnation agent, based on thermally programmed oxidation analysis, carbon nuclear magnetic resonance analysis, or both.