US4806699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of aromatic hydrocarbons incorporating by-product utilization
Assignee: BP PLC
•
Filing: 1987-11-05
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Granted: 1989-02-21
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Expires: 2007-11-05
Abstract
Abstract Aromatic hydrocarbons are produced from a feedstock comprising ethane and/or propane and/or butane by the steps of: (A) reacting the feedstock in the presence of a dehydrocyclodimerization catalyst to produce a product comprising aromatic hydrocarbons, hydrogen and methane, (B) separating the product of step (A) into an aromatic hydrocarbon fraction, a methane-rich gaseous fraction and a hydrogen-rich gaseous fraction, (C) feeding all or part of the methane-rich gaseous fraction separated in step (B) to a synthesis gas production unit, thereby to produce synthesis gas, and (D) contacting the synthesis gas from step (C) together with all or part of the hydrogen-rich gaseous fraction separated in step (B), thereby increasing the hydrogen to carbon monoxide ratio of the synthesis gas, with a Fischer-Tropsch conversion catalyst to produce a hydrocarbon product.
Inventors
- 👤 David J. H. Smith
- 👤 William T. Woodfin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:31
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0485; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/24; C01B3/26; C01B3/32; C01B3/34; C01B3/38; C01B3/42; C07C2/00; C07C2/76; C01B2203/00; C01B2203/02; C01B2203/025; C01B2203/04; C01B2203/0415; C01B2203/0465; C01B2203/0475; C01B2203/0495; C01B2203/06; C01B2203/062; C01B2203/12; C01B2203/1205; C01B2203/1211; C01B2203/1235; C01B2203/1241; C01B2203/1258; C01B2203/14; C01B2203/142; C07C2523/00; C07C2523/06; C07C2523/10; C07C2523/38; C07C2523/40; C07C2523/46; C07C2523/54; C07C2523/56; C07C2523/63; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/76; C07C2523/80; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
155 words
A process for the production of aromatic hydrocarbons from a feedstock comprising ethane and/or propane and/or butane which process comprises the steps of: (A) reacting the feedstock in the presence of a dehydrocyclodimerisation catalyst to produce a product comprising aromatic hydrocarbons, hydrogen and methane, (B) separating the product of step (A) into an aromatic hydrocarbon fraction, a methane-rich gaseous fraction and a hydrogen-rich gaseous fraction, (C) feeding all or part of the methane-rich gaseous fraction separated in step (B) to a synthesis gas production unit, thereby to produce synthesis gas comprising hydrogen and carbon monoxide in a ratio less than or equal to 2:1, and (D) contacting the synthesis gas from step (C) together with all or part of the hydrogen-rich gaseous fraction separated in step (B), thereby increasing the hydrogen to carbon monoxide ratio of the synthesis gas to a value greater than 2:1, with a Fischer-Tropsch conversion catalyst to produce a hydrocarbon product.
Claim 2
Dependent Claim
155 words
A process for the production of aromatic hydrocarbons from a feedstock comprising ethane and/or propane and/or butane which process comprises the steps of: (A) reacting the feedstock in the presence of a dehydrocyclodimerisation catalyst to produce a product comprising aromatic hydrocarbons, hydrogen and methane, (B) separating the product of step (A) into an aromatic hydrocarbon fraction, a methane-rich gaseous fraction and a hydrogen-rich gaseous fraction, (C) feeding all or part of the methane-rich gaseous fraction separated in step (B) to a synthesis gas production unit, thereby to produce synthesis gas comprising hydrogen and carbon monoxide in a ratio less than or equal to 2:1, and (D) contacting the synthesis gas from step (C) together with all or part of the hydrogen-rich gaseous fraction separated in step (B), thereby increasing the hydrogen to carbon monoxide ratio of the synthesis gas to a value greater than 2:1, with a Fischer-Tropsch conversion catalyst to produce a hydrocarbon product.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein the synthesis gas production unit is an oxidative synthesis gas production unit.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein additional methane-containing hydrocarbon gas is fed to the synthesis gas production unit in step (C).
Claim 5
Dependent Claim
19 words
A process according to claim 1 wherein the feedstock reacted in step (A) is LPG separated from natural gas.
Claim 6
Dependent Claim
23 words
A process according to claim 4 wherein methane recovered from the separation of the LPG from natural gas is fed to step (C).
Claim 7
Dependent Claim
21 words
A process according to claim 1 wherein the dehydrocyclodimerisation catalyst of step (A) is a gallium loaded ZSM-5 type aluminosilicate zeolite.
Claim 8
Dependent Claim
25 words
A process according to claim 1 wherein the oxidative synthesis gas production unit of step (C) is either a catalysed or uncatalysed partial oxidation unit.
Claim 9
Dependent Claim
45 words
A process according to claim 2 wherein the partial oxidation unit is a catalytic partial oxidation unit which takes the form of either a fluidised bed or a spouted bed of reforming catalyst to which is fed the methane-containing feedstock, steam and an oxygen-containing gas.
Claim 10
Dependent Claim
28 words
A process according to claim 1 wherein carbon monoxide is produced in step (C) and in an additional step (C') carbon dioxide is removed from the synthesis gas.
Claim 11
Dependent Claim
35 words
A process according to claim 1 wherein the amount of hydrogen-rich gaseous fraction admixed with the synthesis gas in step (D) is sufficient to produce a hydrogen to carbon monoxide molar ratio greater than 2:1.
Claim 12
Dependent Claim
22 words
A process according to claim 10 wherein the hydrogen to carbon monoxide molar ratio is in the range from 2.05 to 2.2:1.
Claim 13
Dependent Claim
14 words
A process according to claim 1 wherein the Fischer-Tropsch catalyst comprises ruthenium and ceria.
Claim 14
Dependent Claim
14 words
A process according to claim 1 wherein the Fischer-Tropsch catalyst further incorporates a zeolite.
Claim 15
Dependent Claim
20 words
A process according to claim 1 wherein the Fischer-Tropsch catalyst is one capable of converting synthesis gas to waxy hydrocarbons.
Claim 16
Dependent Claim
15 words
A process according to claim 14 wherein the Fischer-Tropsch catalyst comprises cobalt and zinc oxide.
Claim 17
Dependent Claim
14 words
A process according to claim 15 wherein the Fischer-Tropsch catalyst further incorporates a zeolite.
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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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |