US4390409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Co-processing of residual oil and coal
Assignee: Mobil Oil AS
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Filing: 1981-06-05
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Granted: 1983-06-28
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Expires: 2001-06-05
Abstract
Abstract Coal and metals-containing residual oil are coprocessed under conditions whereby the coal is volatilized and solubilized, the residual oil is demetallized and substantially no coking of the residual oil occurs. The products obtained include metals-free distillates and metals-containing solid fuel.
Inventors
- 👤 Costandi A. Audeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:15
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/02; C10G31/00; C10G31/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
190 words
A process for the volatilization and solubilization of coal and the demetallization of residual oil which comprises: providing coal at a temperature of about 650° to about 750° F. and a metals containing residual oil at a temperature of about 900° to about 950° F. but below the incipient coking temperature of said residual oil to a processing zone maintained under conditions effective to volatilize and solubilize said coal, demetallize said residual oil and substantially prevent coking of said residual oil whereby a first volatile hydrocarbon fraction and a first non-volatile residue are produced, separating volatilized hydrocarbon from said first non-volatile residue, contacting the first non-volatile residue with superheated steam at a temperature of about 1150° F. to 1250° F. under stripping conditions effective to substantially prevent coking of any remaining residual oil and to provide a second volatile hydrocarbon fraction and a second non-volatile residue comprising 1150° F.+residual oil, metals from said residual oil and coal residue, and fractionally distilling the first and second volatile hydrocarbon fractions to provide normally gaseous hydrocarbons, naphtha, gas oil and a bottoms product having a metals content substantially lower than the residual oil.
Claim 2
Dependent Claim
190 words
A process for the volatilization and solubilization of coal and the demetallization of residual oil which comprises: providing coal at a temperature of about 650° to about 750° F. and a metals containing residual oil at a temperature of about 900° to about 950° F. but below the incipient coking temperature of said residual oil to a processing zone maintained under conditions effective to volatilize and solubilize said coal, demetallize said residual oil and substantially prevent coking of said residual oil whereby a first volatile hydrocarbon fraction and a first non-volatile residue are produced, separating volatilized hydrocarbon from said first non-volatile residue, contacting the first non-volatile residue with superheated steam at a temperature of about 1150° F. to 1250° F. under stripping conditions effective to substantially prevent coking of any remaining residual oil and to provide a second volatile hydrocarbon fraction and a second non-volatile residue comprising 1150° F.+residual oil, metals from said residual oil and coal residue, and fractionally distilling the first and second volatile hydrocarbon fractions to provide normally gaseous hydrocarbons, naphtha, gas oil and a bottoms product having a metals content substantially lower than the residual oil.
Claim 3
Dependent Claim
46 words
A process according to claim 1 including the following additional steps: oxidizing the second non-volatile residue in a combustion zone, passing water through the combustion zone in indirect heat exchange relationship thereto to provide the superheated stem and, removing ash comprising metals from the combustion zone.
Claim 4
Dependent Claim
188 words
A process for the volatilization and solubilization of coal and the demetallization of residual oil which comprises: (a) providing a mixture of coal and metals-containing residual oil at a temperature of about 850° to about 875° F. but below the incipient coking temperature of said residual oil to a processing zone maintained under conditions effective to volatilize and solubilize said coal, demetallize said residual oil and substantially prevent coking of said residual oil whereby a first volatile hydrocarbon fraction and a first non-volatile residue are produced, (b) removing volatilized hydrocarbon produced in step (a) from the first non-volatile residue and contacting the first non-volatile residue with steam superheated to a temperature of about 1150° F. to 1250° F. under stripping conditions effective to substantially prevent coking of any remaining residual oil and to provide a second volatile hydrocarbon fraction and a second non-volatile residue comprising residual oil, metals from said residual oil and coal residue, and (c) fractionally distilling the first and second volatile hydrocarbon fractions to provide normally gaseous hydrocarbons, naphtha, gas oil and a bottoms product having a metals content substantially lower than the residual oil.
Claim 5
Dependent Claim
188 words
A process for the volatilization and solubilization of coal and the demetallization of residual oil which comprises: (a) providing a mixture of coal and metals-containing residual oil at a temperature of about 850° to about 875° F. but below the incipient coking temperature of said residual oil to a processing zone maintained under conditions effective to volatilize and solubilize said coal, demetallize said residual oil and substantially prevent coking of said residual oil whereby a first volatile hydrocarbon fraction and a first non-volatile residue are produced, (b) removing volatilized hydrocarbon produced in step (a) from the first non-volatile residue and contacting the first non-volatile residue with steam superheated to a temperature of about 1150° F. to 1250° F. under stripping conditions effective to substantially prevent coking of any remaining residual oil and to provide a second volatile hydrocarbon fraction and a second non-volatile residue comprising residual oil, metals from said residual oil and coal residue, and (c) fractionally distilling the first and second volatile hydrocarbon fractions to provide normally gaseous hydrocarbons, naphtha, gas oil and a bottoms product having a metals content substantially lower than the residual oil.
Claim 6
Dependent Claim
52 words
A process according to claim 3 including the following additional steps: (d) oxidizing the second non-volatile residue in a combustion zone, (e) passing water through the combustion zone in indirect heat exchange relationship thereto to provide the superheated steam of step (b) and, (f) removing ash comprising metals from the combustion zone.
Claim 7
Dependent Claim
21 words
A process according to claim 4, including the following additional step: (g) recovering the metals from the ash of step (f).
Claim 8
Dependent Claim
24 words
A process according to claim 3 wherein the weight ratio of coal to oil in step (a) is between about 0.1 to about 1.0.
Claim 9
Dependent Claim
21 words
A process according to claim 3 wherein the processing zone conditions of step (a) include a temperature of about 825°-875° F.
Claim 10
Dependent Claim
42 words
A process according to claim 3 wherein the superheated steam of step (b) is at a temperature of about 1175° F. to about 1225° F. and the effective conditions of step (b) include a temperature of about 1000° to about 1100° F.
Claim 11
Dependent Claim
42 words
A process according to claim 4, including the following additional step: (h) passing fresh coal through the combustion zone in indirect heat exchange relationship thereto to provide the coal of step (a) at a temperature of about 650° to about 750° F.
Claim 12
Dependent Claim
55 words
A process according to claim 4, including the following additional step: (i) passing a metals-containing residual oil through the combustion zone in indirect heat exchange relationship thereto to provide the residual oil of step (a) at a temperature of about 900° to about 950° F. but below the incipient coking temperature of said residual oil.
Claim 13
Dependent Claim
62 words
A process according to claim 4 including the following additional step: (j) passing a mixture of coal and residual oil through the combustion zone in indirect heat exchange relationship thereto to provide the mixture of coal and residual oil of step (a) at a temperature of about 850° to about 875° F. but below the incipient coking temperature of said residual oil.
Claim 14
Dependent Claim
18 words
A process according to claim 3 wherein the residual oil of step (a) is a 1000° F.+residual oil.
Claim 15
Dependent Claim
29 words
A process according to claim 3 wherein the residual oil of step (a) has a metals content of about 60 to about 6000 ppm (expressed as nickel plus vanadium).
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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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |