Claims
- 1. A process for enhancing the removal of nitrogen and sulfur from oil-shale, which process comprises:
- (a) contacting the oil-shale with a sufficient amount of an aqueous base solution comprised of at least a stoichiometric amount of one or more alkali metal or alkaline-earth metal hydroxides based on the total amount of nitrogen and sulfur present in the oil-shale, and in an amount sufficient to form a two phase liquid, solid system, at a temperature from about 50.degree. C. to about 350.degree. C., and at pressures sufficient to maintain the solution in liquid form,
- (b) separating the effluents from the treated oil-shale, wherein the resulting liquid effluent contains nitrogen moieties and sulfur moieties from the oil-shale and any resulting gaseous effluent contains nitrogen moieties from the oil-shale, and
- (c) converting organic material of the treated oil-shale to shale-oil at a temperature from about 450.degree. C. to about 550.degree. C.
- 2. The process of claim 1 wherein the solution is comprised of sodium hydroxide or potassium hydroxide.
- 3. The process of claim 1 wherein the solution is comprised of calcium hydroxide.
- 4. The process of claim 1 wherein the temperature is from about 75.degree. C. to about 300.degree. C.
- 5. The process of claim 3 wherein the temperature is from about 75.degree. C. to about 300.degree. C.
- 6. The process of claim 2 wherein 50 or less parts of base solution per part of oil-shale, by weight, is employed.
- 7. The process of claim 5 wherein 50 or less parts of calcium hydroxide solution per part of oil-shale, by weight, is employed.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of U.S. Ser. No. 453,729, filed Dec. 27, 1982 now abandoned.
US Referenced Citations (4)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
453729 |
Dec 1982 |
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