Catalyst for selective conversion of oxygenates to aromatics
AssigneeExxonMobil Research and Engineering Company
InventorsStephen J. McCarthy, Rohit Vijay, Brett Loveless
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Abstract
A catalyst composition comprises a self-bound zeolite and a Group 12 transition metal selected from the group consisting of Zn, Cd, or a combination thereof, the zeolite having a silicon to aluminum ratio of at least about 10, the catalyst composition having a micropore surface area of at least about 340 m2/g, a molar ratio of Group 12 transition metal to aluminum of about 0.1 to about 1.3, and at least one of: (a) a mesoporosity of greater than about 20 m2/g; (b) a diffusivity for 2,2-dimethylbutane of greater than about 1×10−2 sec−1 when measured at a temperature of about 120° C. and a 2,2-dimethylbutane pressure of about 60 torr (about 8 kPa).
Claims15
A catalyst composition comprising a self-bound zeolite and a Group 12 transition metal selected from the group consisting of Zn, Cd, or a combination thereof,
- the zeolite having a silicon to aluminum ratio of at least about 10,
- the catalyst composition having a micropore surface area of at least about 340 m2/g, a molar ratio of Group 12 transition metal to aluminum of about 0.1 to about 1.3, and at least one of:
- (a) a mesoporosity of greater than about 20 m2/g;
- and
- (b) a diffusivity for 2,2-dimethylbutane of greater than 1×10−2 sec−1 when measured at a temperature of about 120° C. and a 2,2-dimethylbutane pressure of about 60 torr (about 8 kPa).
A catalyst composition comprising a self-bound zeolite and a Group 12 transition metal selected from the group consisting of Zn, Cd, or a combination thereof,
- the zeolite having a silicon to aluminum ratio of at least about 20, and
- the catalyst composition having a micropore surface area of at least about 340 m2/g, a molar ratio of Group 12 transition metal to aluminum of about 0.1 to about 1.3, a mesoporosity of greater than about 20 m2/g, and a diffusivity for 2,2-dimethylbutane of greater than 1×10−2 sec−1 when measured at a temperature of about 120° C. and a 2,2-dimethylbutane pressure of about 60 torr (about 8 kPa).
Dependencies are inferred from the claim text.