US4419220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic dewaxing process
Assignee: Mobil Oil AS
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Filing: 1982-05-18
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Granted: 1983-12-06
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Expires: 2002-05-18
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
- 👤 Randall D. Partridge
- 👤 Nai Y. Chen
- 👤 Steven S. Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:17
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G45/00; C10G45/58; C10G45/60; C10G45/64; C10G29/00; C10G29/06; Y; Y10; Y10S; Y10S208/00; Y10S208/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
37 words
A process for dewaxing a hydrocarbon feedstock containing straight chain paraffins, which comprises contacting the feedstock with a catalyst comprising zeolite beta having a silica:alumina ratio of at least 30:1 and a hydrogenation component under isomerization conditions.
Claim 2
Dependent Claim
37 words
A process for dewaxing a hydrocarbon feedstock containing straight chain paraffins, which comprises contacting the feedstock with a catalyst comprising zeolite beta having a silica:alumina ratio of at least 30:1 and a hydrogenation component under isomerization conditions.
Claim 3
Dependent Claim
20 words
A process according to claim 1 in which the feedstock includes aromatic components in addition to the straight chain paraffins.
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 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 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 pressure 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 .
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |