US4113607A
Expired / Lapsed
US
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Denitrification process for hydrogenated distillate oils
Assignee: Chevron USA Inc
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Filing: 1977-03-03
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Granted: 1978-09-12
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Expires: 1997-03-03
Abstract
Abstract A process is disclosed for upgrading a hydrogenated distillate oil by extracting nitrogen compounds from the oil. In the process, these compounds are selectively extracted from the oil in a liquid-liquid extraction using as the extracting medium a solution of ferric chloride in furfural. Following intimate contacting of the oil with the extracting solution, the resulting mixture is separated into an oily raffinate phase and a solvent-extract phase. The raffinate oil is especially suitable as a feedstock for a catalytic cracking or hydroprocessing stage employing an acidic catalyst. The extraction is carried out under moderate conditions of temperature and pressure.
Inventors
- 👤 Stephen J. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:33
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G29/00; C10G29/06; C10G29/12; C10G67/00; C10G67/02; C10G67/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A process for upgrading a hydrogenated distillate oil containing a residual nitrogenous component in an amount, calculated as nitrogen, in the range of from about 10 to 600 ppmw, comprising: (1) extracting a major portion of said component from said oil using a solution of ferric chloride, said extracting being under conditions including (a) a temperature in the range of from about 0° to 50° C and (b) a solution-to-oil volume ratio in the range of from about 0.1 to 5, said solution containing at least a major portion of furfural as the solvent thereof and containing said ferric chloride therein in the range of from about 0.001 to 10 weight percent thereby forming a raffinate oil phase containing a minor portion of said nitrogenous component; and (2) withdrawing said raffinate oil phase from step (1).
Claim 2
Dependent Claim
136 words
A process for upgrading a hydrogenated distillate oil containing a residual nitrogenous component in an amount, calculated as nitrogen, in the range of from about 10 to 600 ppmw, comprising: (1) extracting a major portion of said component from said oil using a solution of ferric chloride, said extracting being under conditions including (a) a temperature in the range of from about 0° to 50° C and (b) a solution-to-oil volume ratio in the range of from about 0.1 to 5, said solution containing at least a major portion of furfural as the solvent thereof and containing said ferric chloride therein in the range of from about 0.001 to 10 weight percent thereby forming a raffinate oil phase containing a minor portion of said nitrogenous component; and (2) withdrawing said raffinate oil phase from step (1).
Claim 3
Dependent Claim
35 words
A process as in claim 1 wherein at said withdrawing step (2) the temperature of said phases is below said contacting temperature by an amount in the range of from about 5° to 25° C.
Claim 4
Dependent Claim
38 words
A process as in claim 1 wherein said volume ratio is in the range of from about 0.1 to 3 and said amount of ferric chloride is in the range of from about 0.01 to 5 weight percent.
Claim 5
Dependent Claim
41 words
A process as in claim 1 wherein said temperature range is 10° to 30° C, said volume ratio range is 0.5 to 1.5 and said amount of ferric chloride is in the range of from about 0.1 to 1 weight percent.
Claim 6
Dependent Claim
18 words
A process as in claim 1 wherein said solution contains at least about 80 volume percent of furfural.
Claim 7
Dependent Claim
13 words
A process as in claim 1 wherein said solvent consists essentially of furfural.
Claim 8
Dependent Claim
23 words
A process as in claim 1 wherein said raffinate oil phase has a residual nitrogenous component content which is below about 10 ppmw.
Claim 9
Dependent Claim
23 words
A process as in claim 1 wherein said raffinate oil phase has a residual nitrogenous component content which is below about 2 ppmw.
Claim 10
Dependent Claim
156 words
A process for removing at least 50 percent of a residual nitrogen component from a hydrogenated hydrocarbon distillate feedstock comprising: (1) extracting a first portion of said nitrogen component from said feedstock in a first counter-current extraction column using as the extracting liquid a first extract produced in a second counter-current extraction column, (2) as hereinafter deliniated recovering from said first column a first raffinate and a second extract; (3) extracting a second portion of said nitrogen component from said first raffinate in said second column using as the extracting liquid a solution of ferric chloride, said solution containing (a) at least a major portion of furfural as the solvent thereof and (b) an amount of ferric chloride in the range of from about 0.001 to 10 weight percent; and (4) recovering from said second column a second raffinate and said first extract, said second raffinate containing not more than 50 percent of said nitrogen component.
Claim 11
Dependent Claim
156 words
A process for removing at least 50 percent of a residual nitrogen component from a hydrogenated hydrocarbon distillate feedstock comprising: (1) extracting a first portion of said nitrogen component from said feedstock in a first counter-current extraction column using as the extracting liquid a first extract produced in a second counter-current extraction column, (2) as hereinafter deliniated recovering from said first column a first raffinate and a second extract; (3) extracting a second portion of said nitrogen component from said first raffinate in said second column using as the extracting liquid a solution of ferric chloride, said solution containing (a) at least a major portion of furfural as the solvent thereof and (b) an amount of ferric chloride in the range of from about 0.001 to 10 weight percent; and (4) recovering from said second column a second raffinate and said first extract, said second raffinate containing not more than 50 percent of said nitrogen component.
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |