Process and materials for trim dewaxing of distillates
AssigneeExxonMobil Technology and Engineering Company
InventorsMadelyn Stalzer, Joseph Gatt, Chuansheng Bai, Christopher Oliveri
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Abstract
Described herein are novel and inventive dewaxing processes that employ dewaxing catalysts which are co-extrusions of two different zeolites, particularly two different 10MR zeolites or a co-extrusion of a 10MR zeolite and a 12MR zeolite in combination with a hydrogenation component. The hydrogenation component can be a mixture of non-noble metal components or a mixture of noble metal components. This novel and inventive process demonstrated a significant activity boost (as measured by increased cloud point reduction) and/or selectivity boost (as measured by reduced diesel loss) compared to either single zeolite component.
Claims18
A process for trim dewaxing a distillate boiling range feed, comprising:
- contacting at least a portion of a distillate boiling range feed with a dewaxing catalyst under effective dewaxing conditions to form an a diesel boiling range product, the dewaxing catalyst includes
- (a) a co-extrusion of two different zeolites selected from two different 10-membered ring zeolites, or a 10-membered ring zeolite and a 12-membered ring zeolite, and
- (b) a metal hydrogenation component comprising a first metal selected from the group consisting of nickel, cobalt and mixtures thereof, and a second metal selected from the group consisting of chromium, molybdenum, tungsten and mixtures thereof.
A method comprising:
- (a) forming a mixture which comprises a first zeolite, a second zeolite and a binder, wherein the first zeolite and the second zeolite are two different zeolites;
- (b) mulling the mixture to form an extrudable paste;
- (c) extruding the extrudable paste to form an extrudate;
- and
- (c) drying the extrudate at a temperature of about 80° C. to about 200° C. to form a dried extrudate;
- (d) impregnating the dried extrudate with a solution comprising a source of a metal hydrogenation component;
- and
- (e) drying the metal-containing extrudate at a temperature of about 80° C. to about 200° C. to form a dewaxing catalyst, wherein the dewaxing catalyst includes
- (a) a co-extrusion of the two different zeolites selected from two different 10-membered ring zeolites, or a 10-membered ring zeolite and a 12-membered ring zeolite, and
- (b) the metal hydrogenation component comprising a first metal selected from the group consisting of nickel, cobalt and mixtures thereof, and a second metal selected from the group consisting of chromium, molybdenum, tungsten and mixtures thereof.
A dewaxing catalyst, comprising:
- (a) a co-extrusion of two different zeolites selected from two different 10-membered ring zeolites, or a 10-membered ring zeolite and a 12-membered ring zeolite;
- and
- (b) a metal hydrogenation component comprising a first metal selected from the group consisting of nickel, cobalt and mixtures thereof, and a second metal selected from the group consisting of chromium, molybdenum, tungsten and mixtures thereof.
Dependencies are inferred from the claim text.