US4457832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination catalytic reforming-isomerization process for upgrading naphtha
Assignee: Chevron USA Inc
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Filing: 1983-12-06
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Granted: 1984-07-03
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Expires: 2003-12-06
Abstract
Abstract A reforming-isomerization process for realizing optimum upgrading of a naphtha feedstock is disclosed. The feedstock is reformed over a bimetallic catalyst and the reformate is separated into one or more gas fractions, a C 5 -C 6 paraffin liquid fraction and a reformate liquid product. The C 5 -C 6 fraction is isomerized to upgrade the C 5 -C 6 components and the isomerizate is separate into a light gas product and a C 5 -C 6 isomerizate liquid product with optional separation and recycle of normal paraffins. The light gas products are compressed and recycled for use in the reformation and isomerization. The C 5 -C 6 isomerizate is blended with the reformate liquid product to produce high octane motor fuel.
Inventors
- 👤 Richard C. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:49
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/02; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A combination process for upgrading a naphtha feedstock comprising: (a) catalytically reforming the naphtha feedstock; (b) separating the reformate into one or more gas fractions which combined comprise hydrogen and C 1 -C 4 hydrocarbons, a C 5 -C 6 paraffin-rich liquid fraction, and a liquid residual fraction; (c) catalytically isomerizing the C 5 -C 6 paraffin-rich liquid fraction; and (d) separating the isomerized C 5 -C 6 paraffin-rich liquid fraction into a light gas product fraction and an isomerization liquid product fraction comprising C 5 -C 6 hydrocarbons.
Claim 2
Dependent Claim
89 words
A combination process for upgrading a naphtha feedstock comprising: (a) catalytically reforming the naphtha feedstock; (b) separating the reformate into one or more gas fractions which combined comprise hydrogen and C 1 -C 4 hydrocarbons, a C 5 -C 6 paraffin-rich liquid fraction, and a liquid residual fraction; (c) catalytically isomerizing the C 5 -C 6 paraffin-rich liquid fraction; and (d) separating the isomerized C 5 -C 6 paraffin-rich liquid fraction into a light gas product fraction and an isomerization liquid product fraction comprising C 5 -C 6 hydrocarbons.
Claim 3
Dependent Claim
67 words
The combination process of claim 1 wherein step (b) is carried out in two substeps: (i) separating the reformate into a hydrogen-rich gas fraction containing a major proportion of C 1 and C 2 hydrocarbons and a liquid product fraction, and (ii) splitting the liquid product into a C 3 -C 4 gas fraction, said C 5 -C 6 paraffin-rich liquid fraction and said liquid residual fraction.
Claim 4
Dependent Claim
83 words
The combination process of claim 1 wherein step (b) is carried out in three substeps: (i) separating the reformate into a hydrogen-rich gas fraction containing a major proportion of C 1 and C 2 hydrocarbons and a liquid product fraction; (ii) fractionating the liquid product fraction into a C 3 -C 6 fraction and said liquid residual fraction; and (iii) separating the C 3 -C 6 fraction into a C 3 -C 4 fraction and said C 5 -C 6 paraffin-rich liquid fraction.
Claim 5
Dependent Claim
32 words
The process of claim 2 wherein the hydrogen-rich gas fraction and the light gas product fraction are combined and at least a portion thereof is recycled for use in the feedstock reforming.
Claim 6
Dependent Claim
32 words
The process of claim 3 wherein the hydrogen-rich gas fraction and the light gas product fraction are combined and at least a portion thereof is recycled for use in the feedstock reforming.
Claim 7
Dependent Claim
34 words
The process of claim 1 wherein at least a portion of said gas fraction fractions and at least a portion of the light gas product fraction are recycled for use in the feedstock reforming.
Claim 8
Dependent Claim
27 words
The process of claim 1 wherein the normal C 5 -C 6 hydrocarbons are separated from the isomerizate liquid product fraction and recycled to the isomerization reaction.
Claim 9
Dependent Claim
21 words
The process of claim 1 including the step of (e) blending the isomerizate liquid product fraction with the liquid residual fraction.
References Cited (Backward Citations)
US2958644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |