US3909390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal liquefaction process
Assignee: Universal Oil Products Co
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Filing: 1974-07-29
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Granted: 1975-09-30
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Expires: 1994-07-29
Abstract
Abstract A process for producing hydrocarbonaceous products from coal which includes contacting coal with water, a reducing gas and a catalytic sulfur compound, separating the liquefied coal phase from an aqueous phase, contacting the liquefied coal phase with water to remove ash, extracting the resulting low ash coal liquids with an aromatic hydrocarbon solvent to recover a first, ash-free, hydrocarbonaceous product, and further extracting the raffinate from the aromatic extraction operation with a solvent mixture of a polar hydrocarbonaceous solvent and an aromatic solvent to recover a second, ash-free hydrocarbonaceous solvent and an aromatic solvent to recover a second, ash-free hydrocarbonaceous product.
Inventors
- 👤 Peter Urban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:55
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; Y; Y10; Y10S; Y10S208/00; Y10S208/952
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
248 words
A PROCESS FOR PRODUCING HYDROCARBONACEOUS LIQUID PRODUCTS FROM COAL WHICH COMPRISES THE STEPS OF: A. CONTACTING THE COAL, AT A TEMPERATURE OF FROM ABOUT 15O* TO ABOUT 375*C, AND A PRESSURE OF FROM ABOUT 10 TO ABOUT 300 ATMOSPHERES FOR A CONTACT IME CORRESPONDING TO FROM ABOUT 1 TO ABOUT 600 MINUTES OR A LIQUID HOURLY SPACE VELOCITY OF FROM ABOUT 0.16 TO ABOUT 1.0, WITH FROM ABOUT 100 WEIGHT PERCENT TO ABOUT 1000 WEIGHT PERCENT OF WATER, A REDUCING GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, CARBON MONOXIDE AND MIXTURES THEREOF IN AN AMOUNT OF FROM ABOUT 0.5 TO ABOUT 175 SCF PER POUND OF CARBON IN THE COAL, AND FROM ABOUT 0.01 WEIGHT PERCENT TO ABOUT 1000 WEIGHT PERCENT OF A CATALYST CONSISTING ESSENTIALLY OF A CATALYTIC SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM SULFITES, SULFIDES AND THIOSULFATES, AND SEPARATING THE RESULTING MIXTURE TO PROVIDE A FIRST HYDROCARBONACEOUS PHASE AND A FIRST AQUEOUS PHASE, B. CONTACTING SAID FIRST HYDROCARBONACEOUS PHASE WITH FROM ABOUT 10 WEIGHT PERCENT TO ABOUT 1000 WEIGHT PERCTNT OF WATER AT A TEMPERATURE OF FROM ABOUT 10* TO ABOUT 150*C. AND A PRESSURE OF FROM ABOUT ATMOSPHERIC TO ABOUT 25 ATMOSPHERES FOR A CONTACT TIME OF FROM ABOUT 0.1 MINUTE TO ABOUT 100 MINUTES, AND SEPARATING THE RESULTING MIXTURE TO PROVIDE A SECOND HYDROCARBONACEOUS PHASE AND A SECOND AQUEOUS PHASE, C. ADMIXING SAID SECOND HYDROCARBONACEOUS PHASE WITH FROM ABOUT 10 WEIGHT PERCENT TO ABOUT 1000 WEIGHT PER-
Claim 2
Dependent Claim
248 words
A PROCESS FOR PRODUCING HYDROCARBONACEOUS LIQUID PRODUCTS FROM COAL WHICH COMPRISES THE STEPS OF: A. CONTACTING THE COAL, AT A TEMPERATURE OF FROM ABOUT 15O* TO ABOUT 375*C, AND A PRESSURE OF FROM ABOUT 10 TO ABOUT 300 ATMOSPHERES FOR A CONTACT IME CORRESPONDING TO FROM ABOUT 1 TO ABOUT 600 MINUTES OR A LIQUID HOURLY SPACE VELOCITY OF FROM ABOUT 0.16 TO ABOUT 1.0, WITH FROM ABOUT 100 WEIGHT PERCENT TO ABOUT 1000 WEIGHT PERCENT OF WATER, A REDUCING GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, CARBON MONOXIDE AND MIXTURES THEREOF IN AN AMOUNT OF FROM ABOUT 0.5 TO ABOUT 175 SCF PER POUND OF CARBON IN THE COAL, AND FROM ABOUT 0.01 WEIGHT PERCENT TO ABOUT 1000 WEIGHT PERCENT OF A CATALYST CONSISTING ESSENTIALLY OF A CATALYTIC SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM SULFITES, SULFIDES AND THIOSULFATES, AND SEPARATING THE RESULTING MIXTURE TO PROVIDE A FIRST HYDROCARBONACEOUS PHASE AND A FIRST AQUEOUS PHASE, B. CONTACTING SAID FIRST HYDROCARBONACEOUS PHASE WITH FROM ABOUT 10 WEIGHT PERCENT TO ABOUT 1000 WEIGHT PERCTNT OF WATER AT A TEMPERATURE OF FROM ABOUT 10* TO ABOUT 150*C. AND A PRESSURE OF FROM ABOUT ATMOSPHERIC TO ABOUT 25 ATMOSPHERES FOR A CONTACT TIME OF FROM ABOUT 0.1 MINUTE TO ABOUT 100 MINUTES, AND SEPARATING THE RESULTING MIXTURE TO PROVIDE A SECOND HYDROCARBONACEOUS PHASE AND A SECOND AQUEOUS PHASE, C. ADMIXING SAID SECOND HYDROCARBONACEOUS PHASE WITH FROM ABOUT 10 WEIGHT PERCENT TO ABOUT 1000 WEIGHT PER-
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein said first solvent comprises a monocyclic aromatic hydrocarbon selected from the group consisting of benzene, lower alkylbenzenes, and mixtures thereof.
Claim 4
Dependent Claim
84 words
The process of claim 1 wherein said second solvent comprises a mixture of from about 50 weight percent to about 95 weight percent of a monocyclic aromatic hydrocarbon component selected from the group consisting of benzene, lower alkylbenzene, and mixtures thereof and from about 5 weight percent to about 50 weight percent of a polar hydrocarbonaceous component selected from the group consisting of lower alkylsulfoxides, lower alkylsulfones, pyridines, quinolines, phenol, lower alkylphenols, lower alkylamines, lower alkylformamides, lower alkylethers of polyethylene glycol, and mixtures thereof.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said catalytic sulfur compound is an alkali metal sulfide.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein said catalytic sulfur compound is an alkali metal sulfite.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein said catalytic sulfur compound is an alkali metal thiosulfate.
Claim 8
Dependent Claim
50 words
The process of claim 1 wherein said coal is contacted, in Step (a), with from about 1 weight percent to about 1000 weight percent of an aromatic hydrocarbon selected from benzene, lower alkylbenzenes, naphthalene, lower alkylnaphthalenes and mixtures thereof, in addition to said water, said reducing gas and said catalyst.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |