Patent US4067797A successfully refreshed from Google Patents.
US4067797A
Expired / Lapsed
US
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Hydrodewaxing
Assignee: Mobil Oil AS
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Filing: 1976-01-16
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Granted: 1978-01-10
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Expires: 1996-01-16
Abstract
Abstract A hydrocarbon fuel oil composition comprising a blend of untreated low pour-point distillate oil and a higher pour-point catalytically hydrodewaxed distillate oil. The blend has an unexpectedly low pour point and cloud point. Dewaxing is effected with a ZSM-5 type catalyst.
Inventors
- 👤 Nai Yuen Chen
- 👤 Bernard M. Gillespie
- 👤 Henry R. Ireland
- 👤 Thomas R. Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:43
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/46; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A blended hydrocarbon fuel oil comprising an untreated distillate oil having a pour point of about -21° to 30° F combined with a hydrodewaxed oil produced by hydrodewaxing a high pour hydrocarbon distillate having a pour point greater than about 30° F with a ZSM-5 type catalyst under a hydrogen pressure of about 100 to 1500 p.s.i.g., at a space velocity of about 0.5 to 10 L.H.S.V., and at a temperature of about 500° F to about 850° F, said hydrodewaxed oil having a pour point higher than said untreated distillate oil.
Claim 2
Dependent Claim
92 words
A blended hydrocarbon fuel oil comprising an untreated distillate oil having a pour point of about -21° to 30° F combined with a hydrodewaxed oil produced by hydrodewaxing a high pour hydrocarbon distillate having a pour point greater than about 30° F with a ZSM-5 type catalyst under a hydrogen pressure of about 100 to 1500 p.s.i.g., at a space velocity of about 0.5 to 10 L.H.S.V., and at a temperature of about 500° F to about 850° F, said hydrodewaxed oil having a pour point higher than said untreated distillate oil.
Claim 3
Dependent Claim
16 words
The blended hydrocarbon fuel oil claimed in claim 1, wherein said ZSM-5 type catalyst is ZSM-5.
Claim 4
Dependent Claim
40 words
The blended hydrocarbon fuel oil claimed in claim 2 wherein said untreated distillate oil has an end point of about 550° to 750° F, and said high pour hydrocarbon distillate has an end point of about 600° to 900° F.
Claim 5
Dependent Claim
27 words
The blended hydrocarbon fuel oil claimed in claim 1 wherein said untreated distillate oil and said high pour hydrocarbon distillate are both distilled from the same stock.
Claim 6
Dependent Claim
24 words
The blended hydrocarbon fuel oil claimed in claim 2 wherein said hydrodewaxed oil constitutes from about 10 to 70 volume percent of said blend.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |