Patent US4343692A successfully refreshed from Google Patents.
US4343692A
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Catalytic dewaxing process
Assignee: Shell USA Inc
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Filing: 1981-03-27
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Granted: 1982-08-10
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Expires: 2001-03-27
Abstract
Abstract An improved process for catalytically hydrodewaxing a petroleum feedstock selected from a petroleum distillate or residual fraction, by contact of the feedstock and hydrogen with a catalyst is disclosed where the catalyst is a synthetic ferrierite zeolite having incorporated therewith at least one metal selected from the group consisting of Group VI B, Group VII B and Group VIII metals.
Inventors
- 👤 Bruce H. C. Winquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:52
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/10; B01J29/12; B01J29/40; B01J29/48; B01J29/65; B01J29/66; B01J29/67
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
In the process for catalytically hydrodewaxing a pretroleum feedstock selected from the group consisting of distillates and residual fractions by contact of said feedstock and hydrogen with a catalyst, the improvement wherein said catalyst is a synthetic ferrierite zeolite having incorporated therewith at least one metal selected from the group consisting of Group VI B, Group VII B and Group VIII metals.
Claim 2
Dependent Claim
62 words
In the process for catalytically hydrodewaxing a pretroleum feedstock selected from the group consisting of distillates and residual fractions by contact of said feedstock and hydrogen with a catalyst, the improvement wherein said catalyst is a synthetic ferrierite zeolite having incorporated therewith at least one metal selected from the group consisting of Group VI B, Group VII B and Group VIII metals.
Claim 3
Dependent Claim
23 words
The process according to claim 1 wherein said metal is selected from the group consisting of Pt, Pd, Mo, W, Co and Ni.
Claim 4
Dependent Claim
19 words
The process according to claim 1 wherein said metal is selected from the group consisting of Pt and Pd.
Claim 5
Dependent Claim
29 words
The process according to claim 1 or claim 3 wherein said synthetic ferrierite has a SiO 2 to Al 2 O 3 molar ratio of greater than about 10:1.
Claim 6
Dependent Claim
22 words
The process according to claim 4 wherein said SiO 2 to Al 2 O 3 molar ratio is greater than about 80:1.
Claim 7
Dependent Claim
37 words
The process according to claim 1 or claim 3 wherein the amount of metal incorporated with the synthetic ferrierite is about 0.01 to about 10.0 percent by weight based on the total weight of metal plus ferrierite.
Claim 8
Dependent Claim
41 words
The process according to claim 1 wherein the hydrodewaxing conditions comprise a hydrogen pressure of about 500 to about 3,000 psig, a temperature of about 200° to about 425° C., and a space velocity of about 0.10 to about 10.0 LHSV.
Claim 9
Dependent Claim
23 words
The process according to claim 1 wherein the boiling range of the petroleum feedstock is between about 200° C. and about 800° C.
Claim 10
Dependent Claim
27 words
The process according to claim 8 wherein said petroleum feedstock is a petroleum distillate having a boiling range of between about 200° C. and about 550° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |