Patent US3853749A successfully refreshed from Google Patents.
US3853749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of hydrocracked lube oil by contacting said oil with a catalyst of the zsm-5 type
Assignee: Mobil Oil AS
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Filing: 1973-07-06
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Granted: 1974-12-10
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Expires: 1993-07-06
Abstract
Abstract A process for stabilizing a hydrocracked lube oil against deterioration attributable to exposure to light and/or air by contacting such hydrocracked lube oil containing a substantial proportion of paraffins with a catalyst of the ZSM-5 type under specified conditions.
Inventors
- 👤 W Espenscheid
- 👤 T Yan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:10
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/12; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A PROCESS FOR STABILIZING A HYDROCRACKED LUBE OIL AGAINST DETERIORATION ATTRIBUTABLE TO EXPOSURE TO LIGHT AND/OR AIR WHICH COMPRISES CONTACTING A HYDROCRACKED LUBE OIL WITH A CATALYST OF ZMS-5 TYPE IN THE PRESENCE OF A SMALL AMOUNT, GENERALLY AT LEAST ABOUT 1 WEIGHT PERCENT OF PARAFFINS, WHICHA RE NORMAL PARAFFINS OR THOSE HAVING SLIGHTLY BRANCHED CHAINS, CAPABLE OF ENTERING THE PORE STRUCTURE OF SAID CATALYST, SAID CONTACTING TAKING PLACE AT A TEMPERATURE IN THE APPROXIMATE RANGE OF 400* TO 650*F. A LIQUID HOURLY SPACE VELOCITY OF 0.1 TO 10 AND A PRESSURE FROM ABOUT ATOMOSPHERIC TO 2,000 PSIG AND RECOVERING A LUBRICATING OIL OF IMPROVED STABILITY CHARACTERISTICS.
Claim 2
Dependent Claim
107 words
A PROCESS FOR STABILIZING A HYDROCRACKED LUBE OIL AGAINST DETERIORATION ATTRIBUTABLE TO EXPOSURE TO LIGHT AND/OR AIR WHICH COMPRISES CONTACTING A HYDROCRACKED LUBE OIL WITH A CATALYST OF ZMS-5 TYPE IN THE PRESENCE OF A SMALL AMOUNT, GENERALLY AT LEAST ABOUT 1 WEIGHT PERCENT OF PARAFFINS, WHICHA RE NORMAL PARAFFINS OR THOSE HAVING SLIGHTLY BRANCHED CHAINS, CAPABLE OF ENTERING THE PORE STRUCTURE OF SAID CATALYST, SAID CONTACTING TAKING PLACE AT A TEMPERATURE IN THE APPROXIMATE RANGE OF 400* TO 650*F. A LIQUID HOURLY SPACE VELOCITY OF 0.1 TO 10 AND A PRESSURE FROM ABOUT ATOMOSPHERIC TO 2,000 PSIG AND RECOVERING A LUBRICATING OIL OF IMPROVED STABILITY CHARACTERISTICS.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said contacting is conducted in the presence of hydrogen.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein said hydrocracked lube oil is a waxy hydrocracked lube oil and said parafFins are contained therein.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said paraffins are added to the hydrocracked lube oil.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein said catalyst is HZSM-5.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein said temperature is between about 450*F. and about 550*F.
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein said catalyst of the ZSM-5 type is combined with a binder.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |