Patent US5858030A successfully refreshed from Google Patents.
US5858030A
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Diesel fuel composition comprising dialkoxy alkanes for increased cetane number
Assignee: Air Products and Chemicals Inc
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Filing: 1997-09-23
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Granted: 1999-01-12
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Expires: 2017-09-23
Abstract
Abstract A diesel fuel composition is set forth for an increased cetane number vis-a-vis conventional diesel fuel compositions. The composition generally comprises one or more compounds selected from the dialkoxy alkane (DAAK) chemical family. In a preferred embodiment of the present invention, the diesel fuel composition consists of moderate amounts of dimethoxy propane (DMPP) and dimethoxy ethane (DMET) blended into a conventional diesel fuel.
Inventors
- 👤 Francis J. Waller
- 👤 Edward L. Weist, Jr.
- 👤 Dennis M. Brown
- 👤 Petrus J. A. Tijm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:22
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/185; C10L1/1852; C10L1/02; C10L1/026; C10L1/182; C10L1/1822; C10L1/1824
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A diesel fuel composition for increased cetane number comprising one or more compounds selected from the group consisting of: (a) dimethoxy propane (DMPP) as represented by CH 3 --O--C 3 H 6 --O--CH 3 ; and (b) dimethoxy ethane (DMET) as represented by CH 3 --O--C 2 H 4 --O--CH 3 wherein the concentration of the DMET in said diesel fuel composition is either: (i) any concentration less than 100 volume % if the DMET is used in combination with DMPP in said diesel fuel composition; or (ii) any concentration greater than or equal to 25 volume % but less than 100 volume % if the DMET is not used in combination with DMPP in said diesel fuel composition.
Claim 2
Dependent Claim
119 words
A diesel fuel composition for increased cetane number comprising one or more compounds selected from the group consisting of: (a) dimethoxy propane (DMPP) as represented by CH 3 --O--C 3 H 6 --O--CH 3 ; and (b) dimethoxy ethane (DMET) as represented by CH 3 --O--C 2 H 4 --O--CH 3 wherein the concentration of the DMET in said diesel fuel composition is either: (i) any concentration less than 100 volume % if the DMET is used in combination with DMPP in said diesel fuel composition; or (ii) any concentration greater than or equal to 25 volume % but less than 100 volume % if the DMET is not used in combination with DMPP in said diesel fuel composition.
Claim 3
Dependent Claim
34 words
The diesel fuel composition of claim 1 which further comprises a conventional diesel fuel consisting of a hydrocarbon distillate having a boiling point between 150° C. and 380° C. (302° F. and 716° F.).
Claim 4
Dependent Claim
25 words
The diesel fuel composition of claim 2 which consists of 12.5 volume % DMPP, 12.5 volume % DMET and 75 volume % conventional diesel fuel.
Claim 5
Dependent Claim
35 words
The diesel fuel composition of claim 2 which further comprises one or more compounds selected from the group consisting of methanol and dimethoxy methane (DMMT) as represented by CH 3 --O--CH 2 --O--CH 3 .
Claim 6
Dependent Claim
29 words
The diesel fuel composition of claim 4 wherein the compounds comprising DMET, DMMT and methanol are produced as liquid reaction products from the oxidative coupling of dimethyl ether (DME).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-01-11 | 2002-07-13 | 2003-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-11 | 2006-07-13 | 2007-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-11 | 2010-07-13 | 2011-01-12 | $7700.00 | Window Closed / Lapsed |