US3852189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shape-selective conversion in the liquid phase
Assignee: Mobil Oil AS
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Filing: 1972-05-30
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Granted: 1974-12-03
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Expires: 1992-05-30
Abstract
Abstract Straight-chain hydrocarbons and slightly branched-chain hydrocarbons are selectively converted in the liquid phase utilizing novel crystalline zeolites having unique molecular sieving properties. The catalyst preferably contains acidic cations and can also contain a component having a hydrogenation/dehydrogenation function. The process of this invention is particularly useful for the shape selective dewaxing of hydrocarbon oils including removal of high freezing point paraffins from jet fuel to lower freezing point, improving the octane rating of naphtha fractions, and lowering the pour point of high pour stocks, all with long catalyst life.
Inventors
- 👤 N Chen
- 👤 W Garwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/16; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2876
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
14 words
9 $ 0.2 M2/NO : AL2O3 : 5 - 100 SIO2 : Z H2O
Claim 2
Dependent Claim
92 words
A PROCESS FOR DEWAXING PETROLEUM CHARGE STOCKS BOILING ABOVE 350*F WHICH COMPRISES CONTACTING SAID CHARGE IN THE ABSENCE OF ADDED HYDROGEN AND AT A TEMPERATURE OF 400*-900*F AND A PRESSURE SUFFICIENT TO MAINTAIN SAID CHARGE IN THE LIQUID PHASE, SAID PRESSURE RANGING FROM ABOUT 100-3,000 PSIG WITH A CRYSTALLINE ALUMINOSILICATE ZEOLITE HAVING AN X-RAY DIFFRACTION PATTERN SET FORTH IN TABLE 1 SO AS TO SELECTIVELY CRACK STRAIGHT-CHAIN HYDROCARBONS AND BRANCHEDCHAIN HYDROCARBONS FREE FROM QUATERNARY CARBON ATOMS IN THEIR STRUCTURE, SAID ALUMINOSILICATE HAVING A COMPOSITION, IN TERMS OF OXIDE MOL RATIOS AS FOLLOWS:
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the zeolite has been base exchanged with ammonium ions, hydrogen ions, metal ions or mixtures thereof.
Claim 4
Dependent Claim
123 words
A process for dewaxing petroleum charge stocks boiling above 350*F which comprises contacting said charge in the absence of added hydrogen and at a temperature of 400*-900*F and a pressure sufficient to maintain said charge in the liquid phase, said pressure ranging from about 100-3,000 psig with a crystalline aluminosilicate zeolite having an X-ray diffraction pattern set forth in Table 4 so as to selectively crack straight-chain hydrocarbons and branched-chain hydrocarbons free from quaternary carbon atoms in their structure, said aluminosilicate having a composition, in terms of oxide mol ratios as follows: 0.9 + or -0.2 M2/nO: Al2O3 : 5-100 SiO2 : z H2O wherein M is a cation, n is the valence of said cation and z is from 0 to 40.
Claim 5
Dependent Claim
22 words
The process of claim 3 wherein the zeolite has been base exchanged with ammonium ions, hydrogen ions, metal ions or mixtures thereof.
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |