US4854939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatization and etherification process integration
Assignee: Mobil Oil AS
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Filing: 1987-12-08
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Granted: 1989-08-08
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Expires: 2007-12-08
Abstract
Abstract An integrated process for the production of aromatics rich an MTBE and TAME rich high octane gasoline fractions is described. Etherifications of iso-olefins is conducted in the presence of excess methanol. Unreacted methanol is passed to a fixed, fluid or moving bed aromatization zone in contact with ZSM-5 catalyst and olefin and paraffin feedstream to produce high octane gasoline.
Inventors
- 👤 Mohsen N. Harandi
- 👤 Hartley Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:31
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/185; C10L1/1852; C10G; C10G3/00; C10G3/42; C10G3/44; C10G3/45; C10G3/48; C10G3/49; C10L1/02; C10L1/023; C10G2300/00; C10G2300/10; C10G2300/1088; C10G2300/40; C10G2300/4006; C10G2300/4012; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P30/00; Y02P30/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A continuous process for the production of aromatics-rich high octane gasoline and ether-rich high octane gasoline, comprising the steps of: (a) contacting a C 4 + hydrocarbon feedstream containing iso-olefins and excess methanol based on said iso-olefins with an acid etherification catalyst under etherification conditions in an etherification zone whereby an effluent stream is produced comprising methyl tertiary alkyl ethers, unreacted methanol and hydrocarbons; (b) distilling said effluent stream whereby a distillate bottom stream is produced comprising high octane ether-rich C 5 + gasoline and a distillate overhead stream comprising unreacted methanol and C 5 - hydrocarbons; (c) passing said distillate overhead stream and an aromatization hydrocarbon feedstream comprising an ethene rich gas feedstream and C 3 hydrocarbons to an olefins and paraffins fixed, fluid or moving bed aromatization zone under aromatization conditions in contact with medium pore size shape selective metallosilicate catalyst having the structure of ZSM-5 whereby a high octane aromatics-rich C 5 + gasoline is produced and hydrogen-rich fuel gas.
Claim 2
Dependent Claim
163 words
A continuous process for the production of aromatics-rich high octane gasoline and ether-rich high octane gasoline, comprising the steps of: (a) contacting a C 4 + hydrocarbon feedstream containing iso-olefins and excess methanol based on said iso-olefins with an acid etherification catalyst under etherification conditions in an etherification zone whereby an effluent stream is produced comprising methyl tertiary alkyl ethers, unreacted methanol and hydrocarbons; (b) distilling said effluent stream whereby a distillate bottom stream is produced comprising high octane ether-rich C 5 + gasoline and a distillate overhead stream comprising unreacted methanol and C 5 - hydrocarbons; (c) passing said distillate overhead stream and an aromatization hydrocarbon feedstream comprising an ethene rich gas feedstream and C 3 hydrocarbons to an olefins and paraffins fixed, fluid or moving bed aromatization zone under aromatization conditions in contact with medium pore size shape selective metallosilicate catalyst having the structure of ZSM-5 whereby a high octane aromatics-rich C 5 + gasoline is produced and hydrogen-rich fuel gas.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein said methanol feed stream comprises a stochiometric excess of methanol between 2 to 200 wt.% based on iso-olefins in said hydrocarbon feed stream.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein said excess methanol is about 20 wt.%.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein said metallosilicate catalyst comprises gallium, iron or aluminum containing metallosilicate.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein said metallosilicate catalyst comprises ZSM-5.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein said aromatization zone conditions comprise temperature between 530° to 850° C. and pressure between 0 and 2000 kPa.
Claim 8
Dependent Claim
19 words
The process of claim 1 wherein said aromatization conditions comprise temperature about 600° C. and pressure about 600 kPa.
Claim 9
Dependent Claim
21 words
The process of claim 1 wherein said methyl tertiary alkyl ethers comprise methyl tertiary butyl ether and methyl tertiary amyl ether.
Claim 10
Dependent Claim
24 words
The process of claim 1 wherein said aromatization feedstream comprises olefins in an amount sufficient to provide an overall exothermic aromatization heat of reaction.
Claim 11
Dependent Claim
25 words
The process of claim 9 comprising feeding said olefins to a middle portion of a moving bed aromatization reactor whereby alkylation of aromatics is increased.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein said aromatization feedstream consists essentially of paraffins and said aromatization zone comprises a moving bed aromatization zone.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |