Patent US4364528A successfully refreshed from Google Patents.
US5114434A
Expired / Lapsed
US
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Viscoreduced diesel fuels having improved cetane numbers
Assignee: Arkema France SA
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Filing: 1990-02-05
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Granted: 1992-05-19
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Expires: 2010-02-05
Abstract
Abstract The cetane numbers of viscoreduced 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; the final product diesel fuels are also effectively deodorized and decolorized.
Inventors
- 👤 Michele Praulus
- 👤 Bernard Dubreux
- 👤 Philippe Mulard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:04
CPC Classifications
C; C10; C10G; C10G55/00; C10G55/02; C10G55/04; C10G27/00; C10G27/04; C10G27/12; F; F02; F02B; F02B3/00; F02B3/06; F02B47/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
59 words
A process for improving the cetane number of a viscoreduced diesel fuel, comprising intimately contacting said viscoreduced diesel fuel with an effective amount of hydrogen peroxide 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 peroxide.
Claim 2
Dependent Claim
59 words
A process for improving the cetane number of a viscoreduced diesel fuel, comprising intimately contacting said viscoreduced diesel fuel with an effective amount of hydrogen peroxide 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 peroxide.
Claim 3
Dependent Claim
32 words
The process as defined by claim 1, comprising intimately contacting said viscoreduced diesel fuel with an effective amount of hydrogen peroxide in the presence of formic acid, acetic acid or propionic acid.
Claim 4
Dependent Claim
26 words
The process as defined by claim 1, comprising intimately contacting said viscoreduced diesel fuel with an effective amount of performic acid, peracetic acid or perpropionic acid.
Claim 5
Dependent Claim
32 words
The process as defined by claim 3, comprising intimately contacting said viscoreduced diesel fuel with an effective amount of performic acid, peracetic acid or perpropionic acid in the presence of hydrogen peroxide.
Claim 6
Dependent Claim
32 words
The process as defined by claim 3, comprising intimately contacting said viscoreduced diesel fuel with an effective amount of performic acid, peracetic acid or perpropionic acid in the absence of hydrogen peroxide.
Claim 7
Dependent Claim
25 words
The process as defined by claim 2, wherein the effective amount of hydrogen peroxide is less than 300 g per kilogram of viscoreduced diesel fuel.
Claim 8
Dependent Claim
25 words
The process as defined by claim 6, wherein the effective amount of hydrogen peroxide is at least 10 g per kilogram of viscoreduced diesel fuel.
Claim 9
Dependent Claim
27 words
The process as defined by claim 7, wherein the effective amount of hydrogen peroxide ranges from 25 g to 100 g per kilogram of viscoreduced diesel fuel.
Claim 10
Dependent Claim
19 words
The process as defined by claim 2, wherein the molar ratio acid/hydrogen peroxide ranges from about 0.01 to 1.
Claim 11
Dependent Claim
15 words
The process as defined by claim 1, said molar ratio ranging from 0.3 to 0.5.
Claim 12
Dependent Claim
18 words
The process as defined by claim 1, carried out at a temperature ranging from 50° to 100° C.
Claim 13
Dependent Claim
25 words
The process as defined in claim 1, carried out for such extent as to assure essentially complete disappearance of the hydrogen peroxide and/or percarboxylic acid.
Claim 14
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 |