Patent US4752381A successfully refreshed from Google Patents.
US4752381A
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Upgrading petroleum and petroleum fractions
Assignee: Nalco Exxon Energy Chemicals LP
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Filing: 1987-05-18
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Granted: 1988-06-21
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Expires: 2007-05-18
Abstract
Abstract A method of neutralizing the organic acidity in petroleum and petroleum fractions to produce a neutralization number less than 1.0 whereby they are rendered suitable as lube oil feed stocks which comprises treating said heavy gas oils with a neutralizing amount of monoethanolamine to form an amine salt with the organic acids and then heating the thus-neutralized petroleum or petroleum fraction at a temperature and for a time sufficient to convert the amine salts to amides.
Inventors
- 👤 Sam Ferguson
- 👤 Darrell D. Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:40
CPC Classifications
C; C10; C10G; C10G19/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A method of neutralizing the organic naphthenic acids acidity present in petroleum and petroleum fractions to produce a neutralization number less than 1.0 whereby they are rendered suitable as lube oil feed stocks which consists essentially of treating said petroleum and petroleum fractions with a neutralizing amount of monoethanolamine to form an amine salt with the organic acids and then heating the thus-neutralized petroleum and petroleum fractions at a temperature at least about 25° F. greater than the boiling point of water and for a time sufficient to convert the amine salts to amides.
Claim 2
Independent Claim
94 words
A method of neutralizing the organic naphthenic acids acidity present in petroleum and petroleum fractions to produce a neutralization number less than 1.0 whereby they are rendered suitable as lube oil feed stocks which consists essentially of treating said petroleum and petroleum fractions with a neutralizing amount of monoethanolamine to form an amine salt with the organic acids and then heating the thus-neutralized petroleum and petroleum fractions at a temperature at least about 25° F. greater than the boiling point of water and for a time sufficient to convert the amine salts to amides.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the neutralized petroleum and petroleum fractions are heated at a temperature of about 400°-500° F. for between 1-2 hours.
Claim 4
Dependent Claim
42 words
The method of claim 1 where the petroleum fraction is from the group consisting of light and heavy gas oils, transformer oils, class A and B, refrigerator oils, chain saw bar oils, ink oils, motor oils, metal cutting oils, and machine oils.
Claim 5
Dependent Claim
13 words
The method of claim 3 where the petroleum fraction is an ink oil.
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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) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |