US4589979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upgrading heavy gas oils
Assignee: Nalco Exxon Energy Chemicals LP
•
Filing: 1985-08-22
•
Granted: 1986-05-20
•
Expires: 2005-08-22
Abstract
Abstract A method of neutralizing the organic acidity in heavy gas oils 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 heavy gas oil 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
2026-11-04 06:26
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
88 words
A method of neutralizing the organic acidity in heavy gas oils 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 heavy gas oils with a neutralizing amount of monoethanolamine to form an amine salt with the organic acids and then heating the thus-neutralized heavy gas oil 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
88 words
A method of neutralizing the organic acidity in heavy gas oils 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 heavy gas oils with a neutralizing amount of monoethanolamine to form an amine salt with the organic acids and then heating the thus-neutralized heavy gas oil 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
24 words
The method of claim 1 wherein the neutralized heavy gas oil is heated at a temperature of about 400°-500° F. for between 1-2 hours.
References Cited (Backward Citations)
US2152720A
Cited
US2152723A
Cited
US2279277A
Cited
US2424158A
Cited
US2701783A
Cited
US2769767A
Cited
US2797188A
Cited
US2769768A
Cited
US2808431A
Cited
US2878181A
Cited
US2956946A
Cited
US3176041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |