US4501926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic dewaxing process with zeolite beta
Assignee: Mobil Oil AS
•
Filing: 1983-09-16
•
Granted: 1985-02-26
•
Expires: 2003-09-16
Abstract
Abstract Hydrocarbon feedstocks such as distillate fuel oils and gas oils are dewaxed by isomerizing the waxy components over a zeolite beta catalyst. The process may be carried out in the presence or absence of added hydrogen. Preferred catalysts have a zeolite silica:alumina ratio over 100:1.
Inventors
- 👤 Rene B. LaPierre
- 👤 Randell D. Partridge
- 👤 Nai Y. Chen
- 👤 Steven S. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06; C10G45/00; C10G45/58; C10G45/60; C10G45/64
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
48 words
A process for dewaxing a hydrocarbon feedstock comprising slightly branched chain paraffins as a waxy component, which comprises contacting the feedstock with a catalyst comprising zeolite beta having a silica:alumina ratio of at least 30:1 and a hydrogenation/dehydrogenation component under isomerization conditions, to isomerize the the waxy component.
Claim 2
Dependent Claim
48 words
A process for dewaxing a hydrocarbon feedstock comprising slightly branched chain paraffins as a waxy component, which comprises contacting the feedstock with a catalyst comprising zeolite beta having a silica:alumina ratio of at least 30:1 and a hydrogenation/dehydrogenation component under isomerization conditions, to isomerize the the waxy component.
Claim 3
Dependent Claim
13 words
A process according to claim 1 in which the feedstock includes aromatic components.
Claim 4
Dependent Claim
23 words
A process according to claim 2 in which the proportion of aromatic components is from 10 to 50 weight percent of the feedstock.
Claim 5
Dependent Claim
17 words
A process according to claim 1 in which the zeolite beta has a silica:alumina ratio over 100:1.
Claim 6
Dependent Claim
19 words
A process according to claim 1 in which the zeolite beta has a silica:alumina ratio of at least 250:1.
Claim 7
Dependent Claim
22 words
A process according to claim 1 in which the hydrogenation/dehydrogenation component comprises a noble metal of Group VIIIA of the Periodic Table.
Claim 8
Dependent Claim
13 words
A process according to claim 6 in which the hydrogenation/dehydrogenation component comprises platinum.
Claim 9
Dependent Claim
21 words
A process according to claim 1 in which the feedstock is contacted with the catalyst in the absence of added hydrogen.
Claim 10
Dependent Claim
51 words
A process according to claim 1 in which the feedstock is contacted with the catalyst in the presence of hydrogen under isomerization conditions of a temperature from 200° C. to 540° C., a pressure from atmospheric to 25,000 kPa and a space velocity (LHSV) from 0.1 to 20 hr. -1 .
Claim 11
Dependent Claim
51 words
A process according to claim 9 in which the feedstock is contacted with the catalyst in the presence of hydrogen under isomerization conditions of a temperature from 400° C. to 450° C., a pressure from 4,000 to 10,000 kPa and a space velocity (LHSV) from 0.2 to 5 hr. -1 .
Claim 12
Dependent Claim
26 words
A process according to claim 1 in which the feedstock comprises a mixture of slightly branched chain paraffins and straight chain paraffins as a waxy component.
References Cited (Backward Citations)
US3308069A
Cited
US3923641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |