US4294720A
Expired / Lapsed
US
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Process for the preparation of gas mixtures
Assignee: Shell USA Inc
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Filing: 1979-12-07
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Granted: 1981-10-13
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Expires: 1999-12-07
Abstract
Abstract A process for removing soot from synthesis gas streams is disclosed. The process is characterized by oxidation of the soot in the presence of water.
Inventors
- 👤 Pieter Visser
- 👤 Johan P. van de Water
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:52
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A process for preparing a gas mixture containing hydrogen and carbon monoxide comprising partially oxidizing a hydrocarbon feedstock with oxygen or an oxygen-containing gas in a partial oxidation reactor at elevated pressure to produce a raw product gas, contacting the raw product gas in a quench zone with water to remove soot and other contaminating material from the gas and producing a gas mixture and a soot-containing liquor, removing soot-containing liquor from the quench zone, and contacting the liquor removed with oxygen or an oxygen-containing gas in a soot oxidation reactor at a temperature between 240° C. and 375° C., and at a pressure at least equal to the vapor pressure of water at the temperature used to oxidize the soot in the liquor and producing CO 2 and a substantially soot-free water effluent.
Claim 2
Dependent Claim
134 words
A process for preparing a gas mixture containing hydrogen and carbon monoxide comprising partially oxidizing a hydrocarbon feedstock with oxygen or an oxygen-containing gas in a partial oxidation reactor at elevated pressure to produce a raw product gas, contacting the raw product gas in a quench zone with water to remove soot and other contaminating material from the gas and producing a gas mixture and a soot-containing liquor, removing soot-containing liquor from the quench zone, and contacting the liquor removed with oxygen or an oxygen-containing gas in a soot oxidation reactor at a temperature between 240° C. and 375° C., and at a pressure at least equal to the vapor pressure of water at the temperature used to oxidize the soot in the liquor and producing CO 2 and a substantially soot-free water effluent.
Claim 3
Dependent Claim
19 words
The process of claim 1, in which the liquor is contacted at a temperature between 300° and 350° C.
Claim 4
Dependent Claim
18 words
The process of claim 2, in which the liquor has a soot concentration between 0.5 and 2 %w.
Claim 5
Dependent Claim
18 words
The process of claim 3, in which the liquor has a soot concentration between 0.8 and 1.3 %w.
Claim 6
Dependent Claim
24 words
The process of claim 2 wherein the CO 2 produced in the soot oxidation reactor is sent for use in the partial oxidation reactor.
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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |