Patent US170991A successfully refreshed from Google Patents.
Patent US4049539A successfully refreshed from Google Patents.
US4049539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage process for upgrading naphtha
Assignee: Mobil Oil AS
•
Filing: 1975-06-13
•
Granted: 1977-09-20
•
Expires: 1995-06-13
Abstract
Abstract Naphthas are upgraded in a two-stage process to give improved yields of high octane gasoline. The first stage operates at low temperatures of 100 DEG -300 DEG F using a highly active chlorinated alumina containing a metal of the platinum group, while the second stage operates at high temperatures using a reforming catalyst.
Inventors
- 👤 Tsoung Y. Yan
- 👤 Tracy J. Huang
- 👤 Werner O. Haag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:47
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; C10G59/00; C10G59/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
A process for upgrading a naphtha feed stock comprising the stages of (1) reforming said feed stock at from about 100° F. to about 300° F. by contacting said feed stock with an alumina catalyst containing a platinum group metal selected from Group VIII of the Periodic Table and also containing from about 5% to about 15% by weight of halogen and (2) subjecting the effluent to a further reforming stage employing a platinum-containing alumina catalyst having therein less than about 1% by weight of chlorine, at a temperature of from about 850° F. to about 1000° F., at a pressure of from about 50 to about 1000 psig and at an LHSV of from about 0.5 to about 10.
Claim 2
Dependent Claim
120 words
A process for upgrading a naphtha feed stock comprising the stages of (1) reforming said feed stock at from about 100° F. to about 300° F. by contacting said feed stock with an alumina catalyst containing a platinum group metal selected from Group VIII of the Periodic Table and also containing from about 5% to about 15% by weight of halogen and (2) subjecting the effluent to a further reforming stage employing a platinum-containing alumina catalyst having therein less than about 1% by weight of chlorine, at a temperature of from about 850° F. to about 1000° F., at a pressure of from about 50 to about 1000 psig and at an LHSV of from about 0.5 to about 10.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the alumina catalyst contains from about 0.01% to about 5% by weight of the Group VIII metal.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the pressure in the first stage is from about 50 psig to about 1000 psig.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein in the first stage the liquid hourly space velocity is from about 0.1 to about 10.
Claim 6
Dependent Claim
22 words
The process of claim 1 wherein in the first stage the hydrogen to hydrocarbon ratio is from about 0.5 to about 15.
Claim 7
Dependent Claim
31 words
The process of claim 1 wherein the effluent from stage (1) is heated at from about 850° F. to about 975° F. prior to charging to the reformer for stage (2).
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein the catalyst used in stage (1) is chlorinated platinum-containing alumina catalyst.
Claim 9
Dependent Claim
26 words
The process of claim 1 wherein the catalyst used in stage (1) contains about 8.7% by weight of chlorine and about 0.55% by weight of platinum.
Claim 10
Dependent Claim
60 words
The process of claim 8 wherein in stage (1) operating conditions include a temperature of 300° F., a pressure of 300 psig, a LHSV of 0.75 and a hydrogen to hydrocarbon ratio of 3 to 1 and in stage (2) include a pressure of 200 psig, a LHSV of 1.5 and a hydrogen to hydrocarbon ratio of 3 to 1.
Claim 11
Dependent Claim
24 words
The process of claim 9 wherein the catalyst used in stage (2) contains 0.35% by weight of platinum and 0.44% by weight of chlorine.
References Cited (Backward Citations)
US2664386A
Cited
US2758064A
Cited
US2970955A
Cited
US2965560A
Cited
US3177135A
Cited
US3502569A
Cited
US3816294A
Cited
US3933619A
Cited
US3974061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |