Patent US4681701A successfully refreshed from Google Patents.
US4681701A
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Process for producing synthesis gas
Assignee: Shell USA Inc
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Filing: 1986-07-14
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Granted: 1987-07-21
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Expires: 2006-07-14
Abstract
Abstract A process for producing synthesis gas by catalytic reforming of hydrocarbons with steam in a reaction zone which is subjected to heat exchange with a combustion gas and recycling heat exchanged combustion gas to a combustion zone. The invention further relates to an apparatus suitable for said process.
Inventors
- 👤 Swan T. Sie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:46
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/384; C01B2203/00; C01B2203/08; C01B2203/0805; C01B2203/0811; C01B2203/0822; C01B2203/0827; Y; Y02; Y02P; Y02P20/00; Y02P20/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
177 words
A process for producing synthesis gas by reforming hydrocarbons with steam in a reforming reaction zone equipped with heat exchange means which comprises: (a) passing an oxygen-containing gas to a compression zone wherein said oxygen-containing gas is compressed and passed to a combustion zone; (b) combusting said compressed gas with a fuel in said combustion zone to form a hot combustion gas effluent stream; (c) passing said hot combustion gas effluent stream to a reforming zone wherein a hydrocarbon feed stream is reformed during which heat exchange takes place between said hot combustion gas effluent stream and said reformer zone to produce a synthesis gas withdrawn from said reformer zone and to form a reformer zone heat exchanged combustion gas; (d) passing at least a portion of said heat exchanged combustion gas to a turbo-expander and generating power which is used to compress said oxygen-containing gas in step (a); and (e) compressing at least another portion of said heat exchanged combustion gas and recycling said compressed heat exchanged combustion gas to said combustion zone of step (b).
Claim 2
Dependent Claim
177 words
A process for producing synthesis gas by reforming hydrocarbons with steam in a reforming reaction zone equipped with heat exchange means which comprises: (a) passing an oxygen-containing gas to a compression zone wherein said oxygen-containing gas is compressed and passed to a combustion zone; (b) combusting said compressed gas with a fuel in said combustion zone to form a hot combustion gas effluent stream; (c) passing said hot combustion gas effluent stream to a reforming zone wherein a hydrocarbon feed stream is reformed during which heat exchange takes place between said hot combustion gas effluent stream and said reformer zone to produce a synthesis gas withdrawn from said reformer zone and to form a reformer zone heat exchanged combustion gas; (d) passing at least a portion of said heat exchanged combustion gas to a turbo-expander and generating power which is used to compress said oxygen-containing gas in step (a); and (e) compressing at least another portion of said heat exchanged combustion gas and recycling said compressed heat exchanged combustion gas to said combustion zone of step (b).
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein said synthesis gas derived from reforming reaction zone is compressed by use of power generated by expanding said portion of said heat exchanged combustion gas in step (d).
Claim 4
Dependent Claim
34 words
The process of claim 1 wherein said compressed heat exchanged combustion gas of step (e) recycled to step (b) is at a temperature of form 600°-850° C. and a pressure of from 5-30 bar.
Claim 5
Dependent Claim
34 words
The process of claim 1 wherein said compressed heat exchanged combustion gas of step (e) recycled to step (b) is at a temperature of from 650°-800° C. and a pressure of from 10-20 bar.
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) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |