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US 9,815,749 B2Granted
Hydrocarbon dehydrocyclization
AssigneeExxonMobil Chemical Patents Inc.
InventorsPaul F. Keusenkothen, Mohsen N. Harandi, John S. Buchanan, Mayank Shekhar
Life of this patent
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Abstract
The invention relates to the production of aromatic hydrocarbon by the conversion of a feed comprising saturated hydrocarbon. At least a portion of the saturated hydrocarbon is converted to olefinic hydrocarbon. Aromatic hydrocarbon is produced from at least a portion of the olefinic hydrocarbon using at least one dehydrocyclization catalyst comprising dehydrogenation and molecular sieve components.
Claims30
A process for producing aromatic hydrocarbon, comprising:
- (a) providing a feed comprising ≧1 wt. % of methane;
- (b) producing an olefinic product by converting ≧10 wt. % of the feed's methane to C2-C4 olefinic hydrocarbon in a first conversion zone;
- (c) providing a dehydrocyclization catalyst having catalytic activity for hydrocarbon dehydrocyclization, wherein the dehydrocyclization catalyst includes a molecular sieve component and a dehydrogenation component;
- (d) producing an aromatic product by converting ≧10 wt. % of the olefinic product's C2-C4 olefinic hydrocarbon to aromatic hydrocarbon in the presence of the dehydrocyclization catalyst in a second conversion zone, wherein
- (i) the conversion is carried out under conversion conditions which include a temperature in the range of from 400° C. to 700° C., a pressure in the range of from 0 psig (101 kPa) to 300 psig (2170 kPa) and
- (ii)the dehydrocyclization catalyst has an average residence time in the conversion zone under the conversion conditions of ≦90 seconds;
- and
- (e) recovering at least a portion of the aromatic product's aromatic hydrocarbon.
5 more elements
A process for upgrading non-aromatic hydrocarbon, comprising:
- (a) providing a feed comprising ≧5 wt. % of C2-C4 paraffinic hydrocarbon;
- (b) producing an olefinic product by converting ≧10 wt. % of the feed's C2-C4 paraffinic hydrocarbon to C2-C4 olefinic hydrocarbon in a first conversion zone;
- (c) providing a dehydrocyclization catalyst which includes (i) ≧25 wt. % of a molecular sieve component, the molecular sieve component comprising ≧90 wt. % of one or more of MCM-22, ZSM-5, ZSM-11, ZSM-12, ZSM-22, ZSM-23, ZSM-35, and ZSM-48, and (ii) ≧0.05 wt. % of a dehydrogenation component, the dehydrogenation component comprising ≧90 wt. % of one or more of Ga, Zn, Cu, Re, Mo, W, La, Fe, Ag, Pt, and Pd;
- (d) producing an aromatic product by converting ≧10 wt. % of the olefinic product's C2-C4 olefinic hydrocarbon to aromatic hydrocarbon in the presence of the dehydrocyclization catalyst in a second conversion zone, wherein
- (i) the conversion is carried out under conversion conditions which include a temperature in the range of from 400° C. to 700° C., a pressure in the range of from 0 psig (101 kPa) to 300 psig (2170 kPa) and
- (ii) the dehydrocyclization catalyst has an average residence time in the conversion zone under the conversion conditions of ≦90 seconds;
- and
- (e) recovering at least a portion of the aromatic product's aromatic hydrocarbon.
5 more elements
A process for producing aromatic hydrocarbon, comprising:
- (a) providing a feed comprising ≧10 wt. % of C5+ hydrocarbon;
- (b) producing an olefinic product by converting ≧10 wt. % of the feed's hydrocarbon to C2-C4 olefinic hydrocarbon in a first conversion zone;
- (c) providing a second conversion zone which includes a dehydrocyclization catalyst having catalytic activity for dehydrocyclization of the C2-C4 olefinic hydrocarbon,
- (d) producing an aromatic product by converting ≧10 wt. % of the olefinic product's C2-C4 olefinic hydrocarbon to aromatic hydrocarbon in the presence of the dehydrocyclization catalyst in a second conversion zone, wherein
- (i) the conversion is carried out under conversion conditions which include a temperature in the range of from 400° C. to 700° C., a pressure in the range of from 0 psig (101 kPa) to 300 psig (2170 kPa) and
- (ii) the dehydrocyclization catalyst has an average residence time in the conversion zone under the conversion conditions of ≦90 seconds;
- and
- (e) recovering at least a portion of the product's aromatic hydrocarbon.
5 more elements
A process for producing aromatic hydrocarbon, comprising:
- (a) providing a feed comprising ≧1 wt. % of paraffinic hydrocarbon;
- (b) producing an olefinic product by converting ≧10 wt. % of the feed's paraffinic hydrocarbon to C2-C4 olefinic hydrocarbon in a first conversion zone, wherein the olefinic product includes at least portion of the C2-C4 olefinic hydrocarbon;
- (c) providing a fluidized catalyst having catalytic activity for hydrocarbon dehydrocyclization,
- (d) producing an aromatic product by converting ≧10 wt. % of the olefinic product's C2-C4 olefinic hydrocarbon to aromatic hydrocarbon in the presence of the fluidized catalyst in a second conversion zone, wherein:
- (i) the aromatic product includes at least a portion of the aromatic hydrocarbon and
- (ii) the conversion is carried out in a under turbulent fluidized bed conversion conditions which include a temperature in the range of from 400° C. to 700° C., a pressure in the range of from 0 psig (101 kPa) to 300 psig (2170 kPa);
- and
- (e) recovering at least a portion of the aromatic product's aromatic hydrocarbon.
5 more elements
Dependencies are inferred from the claim text.