US4090950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing refrigeration oils
Assignee: Sun Petroleum Products Co
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Filing: 1977-04-26
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Granted: 1978-05-23
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Expires: 1997-04-26
Abstract
Abstract A process for making refrigeration oils without acid treating and clay contacting steps which comprises subjecting a naphthenic oil to a first hydrogenation step at a temperature of from about 550° to about 660° F, a hydrogen pressure of from about 500 to about 1500 psig., and in the presence of a nickel-molybdenum or cobalt-molybdenum catalyst, subjecting the hydrogenated oil to a second hydrogenation treatment under the same conditions, catalytically dewaxing the twice hydrogenated oil and percolating the dewaxed oil through bauxite.
Inventors
- 👤 Ronald W. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:32
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A process for making refrigeration oils without acid treating and clay contacting steps which comprises subjecting a high aromatic, low wax naphthenic oil to a first hydrogenating step at a temperature of from about 550° to 660° F, a hydrogen pressure of from about 500 to about 1500 psig, and in the presence of a nickel-molybdenum or cobalt-molybdenum catalyst, stripping out H 2 S and NH 3 from the hydrogenated oil from said first hydrogenating step, subjecting the hydrogenated oil to a second hydrogenating step with the same catalyst as in said first hydrogenating step and under the same conditions, catalytically dewaxing by hydrocracking the twice hydrogenated oil at a temperature of 525° F to 775° F at a hydrogen pressure of 200 to 1500 psig and in the presence of a catalyst comprising a platinum group metal on a crystalline mordenite of reduced alkali metal content, and percolating the dewaxed oil through bauxite.
Claim 2
Dependent Claim
154 words
A process for making refrigeration oils without acid treating and clay contacting steps which comprises subjecting a high aromatic, low wax naphthenic oil to a first hydrogenating step at a temperature of from about 550° to 660° F, a hydrogen pressure of from about 500 to about 1500 psig, and in the presence of a nickel-molybdenum or cobalt-molybdenum catalyst, stripping out H 2 S and NH 3 from the hydrogenated oil from said first hydrogenating step, subjecting the hydrogenated oil to a second hydrogenating step with the same catalyst as in said first hydrogenating step and under the same conditions, catalytically dewaxing by hydrocracking the twice hydrogenated oil at a temperature of 525° F to 775° F at a hydrogen pressure of 200 to 1500 psig and in the presence of a catalyst comprising a platinum group metal on a crystalline mordenite of reduced alkali metal content, and percolating the dewaxed oil through bauxite.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein said naphthenic oil is a blend of vacuum distillates from low wax naphthenic crudes.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein said hydrogenating catalyst is a nickel-molybdenum catalyst.
Claim 5
Dependent Claim
45 words
The process of claim 3 where the two hydrogenating steps are carried out at a temperature of from about 580° to about 620° F, at a pressure of from about 700 to about 1000 psig and a LHSV of from about 0.5 to about 1.0.
References Cited (Backward Citations)
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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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |