US4431519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for catalytically dewaxing oils
Assignee: Mobil Oil AS
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Filing: 1982-10-13
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Granted: 1984-02-14
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Expires: 2002-10-13
Abstract
Abstract The hydrodewaxing of distillate is enhanced by mixing therewith a product which will react exothermally in supplying heat necessary for the dewaxing operation.
Inventors
- 👤 Rene B. LaPierre
- 👤 Randall D. Partridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:13
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
A process for dewaxing a petroleum fraction utilizing a ZSM-5 type zeolite catalyst and an organic compound which will react exothermally in the presence of said zeolite under the same dewaxing conditions comprising: (a) mixing said petroleum fraction and said organic compound; (b) contacting the resultant mixture with said ZSM-5 type catalyst in a reaction zone under dewaxing conditions; and (c) separating from the resulting reaction mixture a dewaxed petroleum fraction.
Claim 2
Dependent Claim
71 words
A process for dewaxing a petroleum fraction utilizing a ZSM-5 type zeolite catalyst and an organic compound which will react exothermally in the presence of said zeolite under the same dewaxing conditions comprising: (a) mixing said petroleum fraction and said organic compound; (b) contacting the resultant mixture with said ZSM-5 type catalyst in a reaction zone under dewaxing conditions; and (c) separating from the resulting reaction mixture a dewaxed petroleum fraction.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein said petroleum fraction is a gas oil having a boiling point above about 350° F.
Claim 4
Dependent Claim
13 words
The process of clam 1 wherein said petroleum fraction is lubricating oil stock.
Claim 5
Dependent Claim
13 words
The process of clam 1 wherein said petroleum fraction is lubricating oil stock.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein said organic compound is selected from the group consisting of methanol, ethanol, their respective ethers or mixtures thereof.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein said organic compound is methanol.
Claim 8
Dependent Claim
22 words
The process of claim 1 wherein said zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35 and ZSM-38.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein said zeolite is ZSM-5 zeolite.
Claim 10
Dependent Claim
16 words
The process of claim 1 wherein said organic compound is added intermittently to said petroleum fraction.
Claim 11
Dependent Claim
20 words
The process of claim 1 wherein said organic compound is added at two or more locations in said reaction zone.
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) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |