US5114433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directly distilled diesel fuels having improved cetane numbers
Assignee: Arkema France SA
•
Filing: 1990-03-14
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Granted: 1992-05-19
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Expires: 2010-03-14
Abstract
Abstract The cetane numbers of directly distilled diesel fuels are significantly improved by intimately contacting same with an effective amount of hydrogen peroxide in the presence of a carboxylic acid, or with an effective amount of a percarboxylic acid either in the presence or absence of hydrogen peroxide.
Inventors
- 👤 Bernard Dubreux
- 👤 Jacques Kervennal
- 👤 Philippe Mulard
- 👤 Michele Pralus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:19
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04; C10G27/12; F; F02; F02B; F02B3/00; F02B3/06; F02B47/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
A process for improving the cetane number of a directly distilled diesel fuel, comprising intimately contacting such directly distilled diesel fuel with an effective amount of hydrogen perioxide in the presence of formic acid, acetic acid or propionic acid, or with an effective amount of performic acid, peracetic acid or perpropionic acid either in the presence or absence of hydrogen perioxide.
Claim 2
Dependent Claim
61 words
A process for improving the cetane number of a directly distilled diesel fuel, comprising intimately contacting such directly distilled diesel fuel with an effective amount of hydrogen perioxide in the presence of formic acid, acetic acid or propionic acid, or with an effective amount of performic acid, peracetic acid or perpropionic acid either in the presence or absence of hydrogen perioxide.
Claim 3
Dependent Claim
33 words
The process as defined by claim 1, comprising intimately contacting said directly distilled diesel fuel with an effective amount of hydrogen perioxide in the presence of formic acid, acetic acid or propionic acid.
Claim 4
Dependent Claim
27 words
The process as defined by claim 1, comprising intimately contacting said directly distilled diesel fuel with an effective amount of performic acid, peracetic acid or perpropionic acid.
Claim 5
Dependent Claim
33 words
The process as defined by claim 3, comprising intimately contacting said directly distilled diesel fuel with an effective amount of performic acid, peracetic acid or perpropionic acid in the presence of hydrogen perioxide.
Claim 6
Dependent Claim
33 words
The process as defined by claim 3, comprising intimately contacting said directly distilled diesel fuel with an effective amount of performic acid, peracetic acid or perpropionic acid in the absence of hydrogen perioxide.
Claim 7
Dependent Claim
26 words
The process as defined by claim 2, wherein the effective amount of hydrogen peroxide is less than 300 g per kilogram of directly distilled diesel fuel.
Claim 8
Dependent Claim
27 words
The process as defined by claim 6, wherein the effective amount of hydrogen peroxide is no greater than 50 g per kilogram of directly distilled diesel fuel.
Claim 9
Dependent Claim
22 words
The process as defined by claim 2, wherein the molar ratio of acid to hydrogen peroxide ranges from about 0.01 to 1.
Claim 10
Dependent Claim
15 words
The process as defined by claim 8, said molar ratio ranging from 0.1 to 0.5.
Claim 11
Dependent Claim
18 words
The process as defined by claim 1, carried out at a temperature ranging from 50° to 10° C.
Claim 12
Dependent Claim
25 words
The process as defined by claim 1, carried out to such extent as to assure essentially complete disappearance of the hydrogen peroxide and/or percarboxylic acid.
Claim 13
Dependent Claim
15 words
The process as defined by claim 2, said hydrogen peroxide comprising an aqueous solution 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) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |