Method of making molecular sieve catalyst
AssigneeExxonMobil Chemical Patents Inc.
InventorsYun-Feng Chang, Stephen N. Vaughn, Jeffery W. Sprinkle, Fran A. Shipley, Kenneth R. Clem
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Abstract
Disclosed is a method for making molecular sieve catalyst particles. Dried molecular sieve catalyst particles are used to make the catalyst. The dried molecular sieve catalyst particles are put into an aqueous solution and stirred to make a slurry. The slurry is dried to make the molecular sieve catalyst particles. Optionally, the dried molecular sieve catalyst particles made from the slurry are calcined.
Claims54
A method of making molecular sieve catalyst particles, comprising
- a) providing a first dried molecular sieve catalyst;
- b) combining the first dried molecular sieve catalyst with water to form a water-catalyst composition;
- c) mixing the water-catalyst composition to form a slurry;
- and
- d) drying the slurry to form particles of a second dried molecular sieve catalyst.
A method of recycling molecular sieve catalyst particles having undesired properties, comprising
- (i) mixing a composition comprising molecular sieve, binder and water;
- (ii) drying the composition to form a first dried molecular sieve catalyst;
- (iii) combining at least a portion of the first dried molecular sieve catalyst with water to form a water-catalyst composition;
- (iv) mixing the water-catalyst composition to form a slurry;
- (v) drying the slurry to form particles of a second dried molecular sieve catalyst.
A method of making a molecular sieve catalyst composition, comprising:
- providing first dried molecular sieve catalyst particles, wherein the first dried molecular sieve catalyst particles yield, upon calcining, a calcined molecular sieve composition having greater than 5 wt % catalyst particles having an average particle diameter greater than or equal to 250 microns;
- combining the dried molecular sieve catalyst particles with water to form a slurry;
- and
- drying the slurry to form the molecular sieve catalyst composition.
A calcined molecular sieve catalyst composition comprising catalyst particles, wherein the catalyst particles, after being submitted to calcination, have an EMARI of equal or less than 0.7 wt %/hr, preferably less than 0.3 wt %/hr.
Dependencies are inferred from the claim text.