EP0237214A2
Expired / Lapsed
EP
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Process for enhancing the cetane number of diesel fuel
Assignee: ENSR Corp (A DELAWARE CORPORATION)
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Filing: 1987-02-20
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Granted: —
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Expires: 2007-02-20
Abstract
Abstract A process for enhancement of the cetane number of a diesel fuel which in one embodiment comprises: (1) treating a diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, to about 10 weight percent or less of the diesel oil feed; (2) removing unreacted nitrogenous treating agent from the diesel oil of step (1) to produce a treated diesel oil, and; (3) blending the treated diesel oil of step (2) with an untreated diesel oil to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is (a) about 300 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from virgin diesel oil stock; or (b) about 450 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from hydrotreated diesel oil stock.
Inventors
- 👤 Hossein Zarrineghbal
- 👤 Saeed T. Darian
- 👤 James R. Kittrell
- 👤 Charles W. Quinlan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 18:13
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/08; C10G; C10G17/00; C10G17/02; C10G27/00; C10G27/04; C10G27/12; C10G29/00; C10G29/02
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
147 words
A process for enhancement of the cetane number of a diesel fuel comprising: (1) treating a diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, of about 10 weight percent or less of the diesel oil feed; (2) removing unreacted nitrogenous treating agent from the diesel oil of step (1) to produce a treated diesel oil; and (3) blending the treated diesel oil of step (2) with an untreated diesel oil to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is (a) about 300 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from virgin diesel oil stock; or (b) about 450 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from hydrotreated diesel oil stock.
Claim 2
Dependent Claim
147 words
A process for enhancement of the cetane number of a diesel fuel comprising: (1) treating a diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, of about 10 weight percent or less of the diesel oil feed; (2) removing unreacted nitrogenous treating agent from the diesel oil of step (1) to produce a treated diesel oil; and (3) blending the treated diesel oil of step (2) with an untreated diesel oil to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is (a) about 300 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from virgin diesel oil stock; or (b) about 450 ppm or less of nitrogen added when the diesel oil treated in step (1) is obtained from hydrotreated diesel oil stock.
Claim 3
Dependent Claim
16 words
The process of claim 1, wherein said nitrogenous treating agent is a gaseous nitrogenous treating agent.
Claim 4
Dependent Claim
16 words
The process of claim 1, wherein said nitrogenous treating agent is a liquid nitrogenous treating agent.
Claim 5
Dependent Claim
18 words
The process of claim 3, wherein said liquid nitrogenous treating agent is an aqueous solution of nitric acid.
Claim 6
Dependent Claim
25 words
The process of claim 1, wherein said step (1) and/or step (2) is conducted in the presence of an organic acid or an inorganic acid.
Claim 7
Dependent Claim
37 words
The process of claim 1, wherein the weight ratio of said nitrogenous treating agent in an amount equivalent on a 100% HNO 3 basis, to said diesel feed of step (1) is about 0.0002 to about 0.1.
Claim 8
Dependent Claim
22 words
The process of claim 1, wherein the removing of the excess nitrogenous treating agent is by decanting, water washing or clay treatment.
Claim 9
Dependent Claim
20 words
The process of claim 1. wherein said blended diesel fuel obtained is a fuel meeting specifications for automotive diesel use.
Claim 10
Dependent Claim
20 words
The process of claim 1. wherein said blended diesel fuel obtained is a fuel meeting specifications for railroad diesel use.
Claim 11
Dependent Claim
21 words
The process of claim 1, wherein said blended diesel fuel obtained is a fuel meeting specifications for motor truck diesel use.
Claim 12
Dependent Claim
20 words
The process of claim 1, wherein said blended diesel fuel obtained is a fuel meeting specifications for marine diesel use.
Claim 13
Dependent Claim
137 words
A process for the enhancement of the cetane number of a non-fungible diesel fuel comprising (1) treating a first diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, of about 10 weight percent or less of the diesel oil feed; (2) removing unreacted nitrogenous treating agent from the diesel oil of step (1); and (3) blending the treated diesel oil of step (2) with a second diesel oil which has not been treated as in step (1) above to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is about 1000 ppm or less of nitrogen added, and wherein the first diesel oil treated in step (1) and/or the second diesel oil blended in step (3) is a non-fungible diesel fuel.
Claim 14
Dependent Claim
137 words
A process for the enhancement of the cetane number of a non-fungible diesel fuel comprising (1) treating a first diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, of about 10 weight percent or less of the diesel oil feed; (2) removing unreacted nitrogenous treating agent from the diesel oil of step (1); and (3) blending the treated diesel oil of step (2) with a second diesel oil which has not been treated as in step (1) above to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is about 1000 ppm or less of nitrogen added, and wherein the first diesel oil treated in step (1) and/or the second diesel oil blended in step (3) is a non-fungible diesel fuel.
Claim 15
Dependent Claim
16 words
The process of claim 12, wherein said nitrogenous treating agent is a gaseous nitrogenous treating agent.
Claim 16
Dependent Claim
16 words
The process of claim 12, wherein said nitrogenous treating agent is a liquid nitrogenous treating agent.
Claim 17
Dependent Claim
18 words
The process of claim 14, wherein said liquid nitrogenous treating agent is an aqueous solution of nitric acid.
Claim 18
Dependent Claim
25 words
The process of claim 12, wherein said step (1) and/or step (2) is conducted in the presence of an organic acid or an inorganic acid.
Claim 19
Dependent Claim
46 words
h'he process of claim 12, wherein the weight ratio of said nitrogenous treating agent to said diesel oil fuel of step (1) is an amount of nitrogenous treating agent equivalent to a nitric acid weight ratio of about 0.0002 to about 0.1 to said diesel oil.
Claim 20
Dependent Claim
22 words
The process of claim 12, wherein the removing of the unreacted nitrogenous treating agent is by decanting, water washing or clay treatment.
Claim 21
Dependent Claim
158 words
A process for enhancement of the cetane number of a diesel fuel comprising: (1) treating a diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, of about 10 weight percent or less of the diesel oil feed; (2) separating unreacted nitrogenous treating agent from the diesel oil of step (1); (3) treating the diesel oil of step (2) with an inorganic alkali to produce a treated . diesel oil; and (4) blending the treated diesel oil of step (3) with an untreated diesel oil to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is (a) about 300 ppm or less nitrogen added when the diesel oil treated in step (1) is obtained from virgin diesel oil stock; or (b) about 450 ppm or less nitrogen added when the diesel oil treated in step (1) is obtained from hydrotreated diesel oil stock.
Claim 22
Dependent Claim
158 words
A process for enhancement of the cetane number of a diesel fuel comprising: (1) treating a diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100% nitric acid basis, of about 10 weight percent or less of the diesel oil feed; (2) separating unreacted nitrogenous treating agent from the diesel oil of step (1); (3) treating the diesel oil of step (2) with an inorganic alkali to produce a treated . diesel oil; and (4) blending the treated diesel oil of step (3) with an untreated diesel oil to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is (a) about 300 ppm or less nitrogen added when the diesel oil treated in step (1) is obtained from virgin diesel oil stock; or (b) about 450 ppm or less nitrogen added when the diesel oil treated in step (1) is obtained from hydrotreated diesel oil stock.
Claim 23
Dependent Claim
16 words
The process of claim 19, wherein said nitrogenous treating agent is a gaseous nitrogenous treating agent.
Claim 24
Dependent Claim
16 words
The process of claim 19, wherein said nitrogenous treating agent is a liquid nitrogenous treating agent.
Claim 25
Dependent Claim
18 words
The process of claim 21, wherein said liquid nitrogenous treating agent is an aqueous solution of nitric acid.
Claim 26
Dependent Claim
17 words
The process of claim 19, wherein the inorganic alkali is sodium hydroxide, potassium hydroxide or ammonium hydroxide.
Claim 27
Dependent Claim
12 words
The process of claim 19, wherein the inorganic alkali is ammonium hydroxide.
Claim 28
Dependent Claim
25 words
The process of claim 19, wherein the inorganic alkali is an aqueous solution of a concentration of about 0.01 to about 5 M inorganic alkali.
Claim 29
Dependent Claim
24 words
The process of claim 19, wherein the weight ratio of inorganic alkali to diesel oil of step (2) is about 0.01:1 to about 1:1.
Claim 30
Dependent Claim
23 words
The process of claim 19, wherein said treatment step (1) is conducted in the presence of an organic acid or an inorganic acid.
Claim 31
Dependent Claim
37 words
The process of claim 19, wherein the weight ratio of said nitrogenous treating agent, in an amount equivalent on a 100x HN03 basis, to said diesel oil feed of step (1) is about 0.0002:1 to about 0.1:1.
Claim 32
Dependent Claim
21 words
The process of claim 19, wherein the separating of unreacted nitrogenous treating agent in step (2) is by decanting or stripping.
Claim 33
Dependent Claim
35 words
The process of claim 19, wherein said process includes water washing the treated diesel oil of step (3) prior to blending the treated diesel oil of step (3) with untreated diesel oil in step (4).
Claim 34
Dependent Claim
82 words
The process of claim 19, wherein said process includes blending a stability additive with said blended fuel obtained in step (4) to achieve a particular level of stability and the amount of stability additive blended is about 25% to about 75% of the amount of stability additive necessary to be blended with a diesel fuel blend obtained by producing a diesel fuel blend by conducting only steps (1), (2) and (4) of claim 1 and achieve substantially said particular level of stability.
Claim 35
Dependent Claim
20 words
The process of claim 19, wherein said blended diesel fuel obtained is a fuel meeting specifications for automotive diesel use.
Claim 36
Dependent Claim
20 words
The process of claim 19, wherein said blended diesel fuel obtained is a fuel meeting specifications for railroad diesel use.
Claim 37
Dependent Claim
21 words
The process of claim 19, wherein said blended diesel fuel obtained is a fuel meeting specifications for motor truck diesel use.
Claim 38
Dependent Claim
20 words
The process of claim 19, wherein said blended diesel fuel obtained is a fuel meeting specifications for marine diesel use.
Claim 39
Dependent Claim
161 words
A process for the enhancement of the cetane number of a non-fungible diesel fuel comprising (1) treating a first diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100x nitric acid basis, of about 10 weight percent or less of the diesel oil feed; (2) separating unreacted nitrogenous treating agent from the diesel oil of step (1); (3) treating the diesel oil of step (2) with an inorganic alkali to produce a treated diesel oil; and (4) blending the treated diesel oil of step (3) with a second diesel oil which has not been treated as in step (1) above to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is about 1000 ppm or less, and wherein the first diesel oil treated in step ( 1 ) and/or the second diesel oil blended in step (4) and/or the blended product of step (4) is a non-fungible diesel fuel.
Claim 40
Dependent Claim
161 words
A process for the enhancement of the cetane number of a non-fungible diesel fuel comprising (1) treating a first diesel oil with a nitrogenous treating agent in a nitrogen amount, equivalent on a 100x nitric acid basis, of about 10 weight percent or less of the diesel oil feed; (2) separating unreacted nitrogenous treating agent from the diesel oil of step (1); (3) treating the diesel oil of step (2) with an inorganic alkali to produce a treated diesel oil; and (4) blending the treated diesel oil of step (3) with a second diesel oil which has not been treated as in step (1) above to produce a blended diesel fuel such that the added nitrogen content in the blended diesel fuel is about 1000 ppm or less, and wherein the first diesel oil treated in step ( 1 ) and/or the second diesel oil blended in step (4) and/or the blended product of step (4) is a non-fungible diesel fuel.
Claim 41
Dependent Claim
16 words
The process of claim 36, wherein said nitrogenous treating agent is a gaseous nitrogenous treating agent.
Claim 42
Dependent Claim
16 words
The process of claim 36, wherein said nitrogenous treating agent is a liquid nitrogenous treating agent.
Claim 43
Dependent Claim
18 words
The process of claim 38, wherein said liquid nitrogenous treating agent is an aqueous solution of nitric acid.
Claim 44
Dependent Claim
17 words
The process of claim 36, wherein the inorganic alkali is sodium hydroxide, potassium hydroxide or ammonium hydroxide.
Claim 45
Dependent Claim
12 words
The process of claim 36, wherein the inorganic alkali is ammonium hydroxide.
Claim 46
Dependent Claim
25 words
The process of claim 36, wherein the inorganic alkali is an aqueous solution of a concentration of about 0.01 to about 5 molar inorganic alkali.
Claim 47
Dependent Claim
24 words
The process of claim 36, wherein the weight ratio of inorganic alkali to diesel oil of step (2) is about 0.01:1 to about 1:1.
Claim 48
Dependent Claim
23 words
The process of claim 36, wherein said treatment step (1) is conducted in the presence of an organic acid or an inorganic alkali.
Claim 49
Dependent Claim
38 words
The process of claim 36, wherein the weight ratio of said nitrogenous treating agent to said diesel oil feed of step (1), in an amount equivalent on a 100% HN0 3 basis, of about 0.0002:1 to about 0.1:1.
Claim 50
Dependent Claim
18 words
The process of claim 36, wherein the separating of unreacted nitrogenous treating agent is by decanting or stripping.
Claim 51
Dependent Claim
35 words
The process of claim 36, wherein said process includes water washing the treated diesel oil of step (3) prior to blending the treated diesel oil of step (3) with untreated diesel oil in step (4).
Claim 52
Dependent Claim
82 words
The process of claim 32, wherein said process includes blending a stability additive with said blended fuel obtained in step (4) to achieve a particular level of stability and the amount of stability additive blended is about 25% to about 75% of the amount of stability additive necessary to be blended with a diesel fuel blend obtained by producing a diesel fuel blend by conducting only steps (1), (2) and (4) of claim 32 and achieve substantially said particular level of stability.
References Cited (Backward Citations)
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