Patent US4877550A successfully refreshed from Google Patents.
US4877550A
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Synthesis gas preparation and catalyst therefor
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1989-01-09
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Granted: 1989-10-31
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Expires: 2009-01-09
Abstract
Abstract Light hydrocarbons, e.g., methane are converted to synthesis gas at elevated temperatures and pressures in the presence of a particulate catalyst, e.g., Ni/Al2O3. The conversion of feed to synthesis gas is preserved by rapidly cooling the reaction production to a temperature below that which favors the back reaction of carbon monoxide and hydrogen to form methane.
Inventors
- 👤 Duane A. Goetsch
- 👤 Geoffrey R. Say
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:38
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/42
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
165 words
In a process for the production of a hydrogen and carbon monoxide containing synthesis gas which comprises (i) reacting in a fluidized reaction zone a light hydrocarbon feed with steam and oxygen at elevated temperature in the presence of catalyst containing nickel on a support, (ii) recovering a product gas comprised of carbon monoxide, hydrogen and entrained catalyst, and (iii) cooling in a cooling zone the product gas to a temperature below that which favors the reaction of carbon monoxide and hydrogen to form methane in the presence of entrained catalyst; THE IMPROVEMENT WHICH COMPRISES (a) cooling the product gas rapidly by indirect means with boiling water forming high pressure steam and at a rate sufficient to preserve at least about 85% of the feed converted to hydrogen and carbon monoxide as hydrogen and carbon monoxide; (b) recovering high pressure steam from the cooling zone; and (c) preheating the light hydrocarbon feed with at least a portion of the steam recovered from the cooling zone.
Claim 2
Dependent Claim
165 words
In a process for the production of a hydrogen and carbon monoxide containing synthesis gas which comprises (i) reacting in a fluidized reaction zone a light hydrocarbon feed with steam and oxygen at elevated temperature in the presence of catalyst containing nickel on a support, (ii) recovering a product gas comprised of carbon monoxide, hydrogen and entrained catalyst, and (iii) cooling in a cooling zone the product gas to a temperature below that which favors the reaction of carbon monoxide and hydrogen to form methane in the presence of entrained catalyst; THE IMPROVEMENT WHICH COMPRISES (a) cooling the product gas rapidly by indirect means with boiling water forming high pressure steam and at a rate sufficient to preserve at least about 85% of the feed converted to hydrogen and carbon monoxide as hydrogen and carbon monoxide; (b) recovering high pressure steam from the cooling zone; and (c) preheating the light hydrocarbon feed with at least a portion of the steam recovered from the cooling zone.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein cooling is effected at a rate of at least about 300° F./second until the temperature of the product gas is less than about 1200° F.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the temperature in the reaction zone is at least about 1750° F.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein at least 5% of the recovered steam is used for preheating the feed.
Claim 6
Dependent Claim
140 words
A process for the production of hydrogen and carbon monoxide which comprises (i) reacting in a fluidized reaction zone a light hydrocarbon feed with steam and oxygen at elevated temperatures in the presence of a catalyst containing nickel on a support; (ii) recovering from the reaction zone a product gas comprising hydrogen, carbon monoxide, and entrained catalyst; (iii) cooling, by indirect means with boiling water forming high pressure steam in a cooling zone, the product gas at a rate of ar least about 300° F./second thereby minimizing the reaction of carbon monoxide with hydrogen to form methane (iv) recovering high pressure steam from the cooling zone; (v) preheating the hydrocarbon feed with at least a portion of the steam recovered in step (iv); and (vi) maintaining a net conversion of feed to carbon monoxide and hydrogen of at least 80%.
Claim 7
Dependent Claim
140 words
A process for the production of hydrogen and carbon monoxide which comprises (i) reacting in a fluidized reaction zone a light hydrocarbon feed with steam and oxygen at elevated temperatures in the presence of a catalyst containing nickel on a support; (ii) recovering from the reaction zone a product gas comprising hydrogen, carbon monoxide, and entrained catalyst; (iii) cooling, by indirect means with boiling water forming high pressure steam in a cooling zone, the product gas at a rate of ar least about 300° F./second thereby minimizing the reaction of carbon monoxide with hydrogen to form methane (iv) recovering high pressure steam from the cooling zone; (v) preheating the hydrocarbon feed with at least a portion of the steam recovered in step (iv); and (vi) maintaining a net conversion of feed to carbon monoxide and hydrogen of at least 80%.
Claim 8
Dependent Claim
17 words
The process of claim 5 wherein the temperature in the reaction zone is at least 1750° F.
Claim 9
Dependent Claim
28 words
The process of claim 5 wherein the formation of carbon in the cooling zone is less than about 0.2 moles carbon per 100 moles carbon monoxide and hydrogen.
Claim 10
Dependent Claim
18 words
The process of claim 5 wherein the cooling is effected at a rate of at least 400° F./second.
Claim 11
Dependent Claim
21 words
The process of claim 8 wherein the net conversion of feed to carbon monoxide and hydrogen is at least about 90%.
Claim 12
Dependent Claim
16 words
The process of claim 5 wherein cooling is effected to a temperature below about 900° F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |