US5486313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of carbon monoxide and/or hydrogen
Assignee: Shell USA Inc
•
Filing: 1994-12-21
•
Granted: 1996-01-23
•
Expires: 2014-12-21
Abstract
Abstract The present invention provides a process for the preparation of carbon monoxide and/or hydrogen from a hydrocarbon feedstock. The hydrocarbon feedstock is subjected in a first stage to a catalytic partial oxidation process in which it is contacted, as a gaseous mixture comprising the hydrocarbon feedstock and an oxygen-containing gas, which gaseous mixture also comprises nitrogen, with a catalyst comprising as a catalytically active metal rhodium, iridium or platinum. At least a portion of the products of the first stage is subjected in a second stage to a process in which ammonia and/or hydrogen cyanide is removed.
Inventors
- 👤 Krijn P. de Jong
- 👤 Peter W. Lednor
- 👤 Anna E. M. Oud
- 👤 Ronald J. Schoonebeek
- 👤 Koert A. Vonkeman
- 👤 Gerardus P. Van Der Zwet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:03
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/386; C01B3/40; C01B3/50; C01B3/52; C01B3/56; C01B2203/00; C01B2203/04; C01B2203/0415; C01B2203/0465; C01B2203/10; C01B2203/1005; C01B2203/1011; C01B2203/1023; C01B2203/1029; C01B2203/1041; C01B2203/1047; C01B2203/1064; C01B2203/107; C01B2203/1082; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
A process for the preparation of carbon monoxide and/or hydrogen from a hydrocarbon feedstock, which process comprises subjecting the hydrocarbon feedstock in a first stage to a catalytic partial oxidation process comprising contacting a gaseous mixture comprising the hydrocarbon feedstock and an oxygen-containing gas, which gaseous mixture also comprises nitrogen, with a catalyst comprising as a catalytically active metal rhodium, iridium or platinum and subjecting at least a portion of the products of the first stage in a second stage to a process in which ammonia and/or hydrogen cyanide is removed.
Claim 2
Dependent Claim
91 words
A process for the preparation of carbon monoxide and/or hydrogen from a hydrocarbon feedstock, which process comprises subjecting the hydrocarbon feedstock in a first stage to a catalytic partial oxidation process comprising contacting a gaseous mixture comprising the hydrocarbon feedstock and an oxygen-containing gas, which gaseous mixture also comprises nitrogen, with a catalyst comprising as a catalytically active metal rhodium, iridium or platinum and subjecting at least a portion of the products of the first stage in a second stage to a process in which ammonia and/or hydrogen cyanide is removed.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein in the first stage the hydrocarbon feedstock comprises methane, natural gas, associated gas or a source of light hydrocarbons.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein in the first stage the oxygen-containing gas is substantially pure oxygen.
Claim 5
Dependent Claim
31 words
The process of claim 1 wherein in the first stage the feed comprises the hydrocarbon feedstock and the oxygen-containing gas in amounts giving an oxygen-to-carbon ratio of from 0.3 to 0.8.
Claim 6
Dependent Claim
28 words
The process of claim 1 wherein in the first stage the feed is contacted with the catalyst at a pressure in the range of up to 150 bar.
Claim 7
Dependent Claim
29 words
The process of claim 1 wherein in the first stage the feed is contacted with the catalyst at a temperature in the range of from 950° to 1300° C.
Claim 8
Dependent Claim
32 words
The process of claim 1 wherein in the first stage the feed is contacted with the catalyst at a gas hourly space velocity in the range of from 20,000 to 100,000,000 Nl/kg/hr.
Claim 9
Dependent Claim
16 words
The process of claim 1 wherein in the first stage the catalyst comprises rhodium or iridium.
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein in the first stage the catalyst is retained in a fixed arrangement.
Claim 11
Dependent Claim
24 words
The process of claim 9 wherein the fixed arrangement of the catalyst has a tortuosity in the range of from 1.1 to about 10.0.
Claim 12
Dependent Claim
23 words
The process of claim 9 wherein the fixed arrangement of the catalyst has from about 1000 to about 15000 pores per square centimeter.
Claim 13
Dependent Claim
21 words
The process of claim 1 wherein in the first stage the feed is contacted with the catalyst under substantially adiabatic conditions.
Claim 14
Dependent Claim
20 words
The process of claim 1 wherein in the second stage ammonia and/or hydrogen cyanide are removed by absorption or adsorption.
Claim 15
Dependent Claim
119 words
A process for the preparation of carbon monoxide and/or hydrogen, which process comprises: a) in a first stage, contacting at elevated temperature and pressure a mixture comprising oxygen, nitrogen and a feedstock selected from the group consisting of methane, natural gas, associated gas and light hydrocarbons oxygen and nitrogen with a catalyst comprising a catalytically active amount of a metal selected from rhodium or iridium, which catalyst is retained in a fixed arrangement having a high tortuosity, to yield a product comprising carbon monoxide, hydrogen, ammonia and hydrogen cyanide; and b) in a second stage, contacting at least a portion of the product with an absorbent or an adsorbent active in removing ammonia and/or hydrogen cyanide from the product.
Claim 16
Dependent Claim
119 words
A process for the preparation of carbon monoxide and/or hydrogen, which process comprises: a) in a first stage, contacting at elevated temperature and pressure a mixture comprising oxygen, nitrogen and a feedstock selected from the group consisting of methane, natural gas, associated gas and light hydrocarbons oxygen and nitrogen with a catalyst comprising a catalytically active amount of a metal selected from rhodium or iridium, which catalyst is retained in a fixed arrangement having a high tortuosity, to yield a product comprising carbon monoxide, hydrogen, ammonia and hydrogen cyanide; and b) in a second stage, contacting at least a portion of the product with an absorbent or an adsorbent active in removing ammonia and/or hydrogen cyanide from the product.
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) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |