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US4474579A
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Process for improving the combustion of diesel engine fuels
Assignee: Wenzel and Weidmann GmbH
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Filing: 1982-11-15
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Granted: 1984-10-02
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Expires: 2002-11-15
Abstract
Abstract In order to improve the combustion of diesel engine fuels, mixtures of neutral salts of carboxylic acids and metals of Atomic Nos. 57 to 71 and free carboxylic acids are added thereto.
Inventors
- 👤 Manfred Wilderson
- 👤 Werner DeWin
- 👤 Bela Tihanyi
- 👤 Jurgen Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:55
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/02; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/188; C10L1/1881; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
66 words
A process for improving the combustion of diesel engine fuels comprising adding an effective amount of a mixture of (a) neutral metal salts of carboxylic acids and (b) free carboxylic acids to said fuels, wherein said salts are metals of atomic numbers 57-71 and aliphaitic monocarboxylic acids having 4-10 carbon atoms, and said free carboxylic acids are selected from aliphatic monocarboxylic acids having 4-10 carbon atoms.
Claim 2
Dependent Claim
66 words
A process for improving the combustion of diesel engine fuels comprising adding an effective amount of a mixture of (a) neutral metal salts of carboxylic acids and (b) free carboxylic acids to said fuels, wherein said salts are metals of atomic numbers 57-71 and aliphaitic monocarboxylic acids having 4-10 carbon atoms, and said free carboxylic acids are selected from aliphatic monocarboxylic acids having 4-10 carbon atoms.
Claim 3
Dependent Claim
51 words
A process for improving the combustion of diesel engine fuels comprising adding an effective amount of a mixture of (a) neutral metal salts of carboxylic acids and (b) free carboxylic acids to said fuels, wherein said salts are metals of atomic numbers 57-71 and aliphatic monocarboxylic acids having 4-10 carbon atoms.
Claim 4
Dependent Claim
51 words
A process for improving the combustion of diesel engine fuels comprising adding an effective amount of a mixture of (a) neutral metal salts of carboxylic acids and (b) free carboxylic acids to said fuels, wherein said salts are metals of atomic numbers 57-71 and aliphatic monocarboxylic acids having 4-10 carbon atoms.
Claim 5
Dependent Claim
36 words
A diesel engine fuel comprising a mixture of free carboxylic acids and carboxylic acid salts wherein said carboxylic acid salts are salts of metals of atomic numbers 57-71 and aliphatic monocarboxylic acids having 4-10 carbon atoms.
Claim 6
Dependent Claim
36 words
A diesel engine fuel comprising a mixture of free carboxylic acids and carboxylic acid salts wherein said carboxylic acid salts are salts of metals of atomic numbers 57-71 and aliphatic monocarboxylic acids having 4-10 carbon atoms.
Claim 7
Dependent Claim
51 words
A diesel engine fuel comprising a mixture of free carboxylic acids and carboxylic acid salts wherein said carboxylic acid salts are salts of metals of atomic numbers 57-71 and aliphatic monocarboxylic acids having 4-10 carbon atoms, and said free carboxylic acids are selected from aliphatic monocarboxylic acids having 4-10 carbon atoms.
Claim 8
Dependent Claim
51 words
A diesel engine fuel comprising a mixture of free carboxylic acids and carboxylic acid salts wherein said carboxylic acid salts are salts of metals of atomic numbers 57-71 and aliphatic monocarboxylic acids having 4-10 carbon atoms, and said free carboxylic acids are selected from aliphatic monocarboxylic acids having 4-10 carbon atoms.
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein the aliphatic monocarboxylic acids are singly or multiply branched.
Claim 10
Dependent Claim
15 words
The process of claim 5 wherein the aliphatic monocarboxylic acids are branched in the α-position.
Claim 11
Dependent Claim
18 words
The process of claim 1 wherein the aliphatic monocarboxylic acids are 2-ethylbutyric acid, 2-ethylhexanoic acid and/or isooctanoic acid.
Claim 12
Dependent Claim
19 words
The process of claim 1 wherein the salts contain the metals individually or in the form of mixtures thereof.
Claim 13
Dependent Claim
17 words
The process of claim 8 wherein the salt mixtures are derived from the naturally occurring cerite earths.
Claim 14
Dependent Claim
15 words
The process of claim 9 wherein the salt mixtures are derived from the mineral bastnasite.
Claim 15
Dependent Claim
22 words
The process of claim 1 wherein 0.1 to 1 mol of said free carboxylic acids is used per mol of said salt.
Claim 16
Dependent Claim
22 words
The process of claim 11 wherein 0.2 to 0.4 mols of said free carboxylic acid is used per mol of said salt.
Claim 17
Dependent Claim
12 words
The process of claim 1 wherein the fuel comprises a natural oil.
Claim 18
Dependent Claim
15 words
The process of claim 13 wherein the natural oil is sunflower oil and/or rapeseed oil.
Claim 19
Dependent Claim
17 words
The process of claim 1 wherein the fuel is a mixture of mineral oil and natural oil.
Claim 20
Dependent Claim
26 words
The process of claim 1 wherein 5 to 200 mg of a lanthanoid metal or a lanthanoid metal mixture is added per kg of said fuel.
Claim 21
Dependent Claim
26 words
The process of claim 1 wherein 10 to 50 mg of a lanthanoid metal or a metal mixture is added per kg of mineral oil-based fuel.
Claim 22
Dependent Claim
26 words
The process of claim 1 wherein 10 to 100 mg of a lanthanoid metal or a metal mixture is added per kg of natural oil-based fuel.
Claim 23
Dependent Claim
14 words
The fuel of claim 4 wherein said monocarboxylic acids are singly or multiply branched.
Claim 24
Dependent Claim
14 words
The fuel of claim 19 wherein said monocarboxylic acids are branched in the α-position.
Claim 25
Dependent Claim
17 words
The fuel of claim 4 wherein said monocarboxylic acids are 2-ethylbutyric acid, 2-ethylhexanoic acid, and/or isooctanoic acid.
Claim 26
Dependent Claim
16 words
The fuel of claim 4 wherein the salts contain said metals individually or as mixtures thereof.
Claim 27
Dependent Claim
16 words
The fuel of claim 22 wherein the salt mixtures are derived from naturally occurring cerite earths.
Claim 28
Dependent Claim
13 words
The fuel of claim 22 wherein said salt mixtures are derived from bastnastite.
Claim 29
Dependent Claim
23 words
The fuel of claim 4 wherein there is present 0.1 to 1.0 mol of said free carboxylic acids per mol of said salt.
Claim 30
Dependent Claim
23 words
The fuel of claim 25 wherein there is present 0.2 to 0.4 mols of said free carboxylic acid per mol of said salt.
Claim 31
Dependent Claim
10 words
The fuel of claim 4 which comprises a natural oil.
Claim 32
Dependent Claim
12 words
The fuel of claim 27 which comprises sunflower oil and/or rapeseed oil.
Claim 33
Dependent Claim
15 words
The fuel of claim 4 which comprises a mixture of mineral oil and natural oil.
Claim 34
Dependent Claim
22 words
The fuel of claim 4 which comprises 5 to 200 mg of a lanthanoid metal or a lanthanoid metal mixture per kg.
Claim 35
Dependent Claim
24 words
The fuel of claim 4 which comprises 10 to 50 mg of said lanthanoid metal or metal mixture per kg of mineral oil-based fuel.
Claim 36
Dependent Claim
24 words
The fuel of claim 4 which comprises 10 to 100 mg of a lanthanoid metal or metal mixture per kg of natural oil-based fuel.
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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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |