US4585461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a diesel fuel additive to improve cetane rating
Assignee: Individual
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Filing: 1984-08-01
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Granted: 1986-04-29
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Expires: 2004-08-01
Abstract
Abstract A method of manufacturing a cetane improver, which includes providing a quantity of fusel oil, adding a substance which is substantially inert to a nitration process, substantially insoluble in water and soluble in fusel oil, and then separating water from the mixture and nitrating the mixture. The invention also includes the composition of matter which has application as a cetane improver which includes a mixture of from 5 to 25% ethyl nitrate and 16 to 33% isobutyl nitrate and 30 to 77% isoamyl nitrate mixed with fusel oil.
Inventors
- 👤 Jeremy W. Gorman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:05
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/23; C10L1/231; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A method of manufacturing a cetane improver, which comprises: providing a quantity of fusel oil; mixing a highly paraffinic hydrocarbon which is substantially free from aromatics and unsaturates, said hydrocarbon having a molecule which contains from 12 to 28 carbon atoms and 22 to 58 hydrogen atoms and which is (1) substantially inert to a liquid phase nitration process, (2) substantially insoluble in water, and (3) soluble in fusel oil, this mixing step causing separation of water from the fusel oil; and nitrating the mixture by the intermixing of the above mixture with a mixture of nitric and sulfuric acid in the liquid phase.
Claim 2
Independent Claim
104 words
A method of manufacturing a cetane improver, which comprises: providing a quantity of fusel oil; mixing a highly paraffinic hydrocarbon which is substantially free from aromatics and unsaturates, said hydrocarbon having a molecule which contains from 12 to 28 carbon atoms and 22 to 58 hydrogen atoms and which is (1) substantially inert to a liquid phase nitration process, (2) substantially insoluble in water, and (3) soluble in fusel oil, this mixing step causing separation of water from the fusel oil; and nitrating the mixture by the intermixing of the above mixture with a mixture of nitric and sulfuric acid in the liquid phase.
Claim 3
Independent Claim
48 words
A method of manufacturing a cetane improver, which comprises: providing a quantity of fusel oil; mixing diesel oil to separate water from the fusel oil; and nitrating the mixture by the intermixing of the above mixture with a mixture of nitric and sulfuric acid in the liquid phase.
Claim 4
Independent Claim
48 words
A method of manufacturing a cetane improver, which comprises: providing a quantity of fusel oil; mixing diesel oil to separate water from the fusel oil; and nitrating the mixture by the intermixing of the above mixture with a mixture of nitric and sulfuric acid in the liquid phase.
Claim 5
Dependent Claim
24 words
The method as described in claim 2, further including: the step of adding a salt to the mixture to precipitate water from the mixture.
Claim 6
Dependent Claim
36 words
The method as described in claim 3, wherein: the salt is insoluble in lower (C 1 -C 7 ) alcohols, but is soluble in water at least to 50% of the weight of the dissolving water.
Claim 7
Dependent Claim
13 words
The method as described in claim 4, wherein: the salt is ammonium carbonate.
Claim 8
Dependent Claim
21 words
The method as described in claim 5, wherein: a nitrating acid is added to the fusel oil instead of visa versa.
Claim 9
Dependent Claim
36 words
The method as described in claim 6, wherein: the inert hydrocarbon is added in a proportion necessary to raise the average molecular weight of the nitratable composition to an approximate range of between 88 and 100.
Claim 10
Dependent Claim
13 words
The method as described in claim 4, wherein: the salt is potassium carbonate.
Claim 11
Dependent Claim
13 words
The method as described in claim 4, wherein: the salt is diammonium phosphate.
Claim 12
Dependent Claim
13 words
The method as described in claim 4, wherein: the salt is sodium bisulphate.
References Cited (Backward Citations)
US1372465A
Cited
US2785662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |