Claims
- 1. A process for treating hydrocarbon oils in order to separate nitrogenous substances, as well as other contaminants, therefrom which comprises (1) contacting the oil in the presence of water with an acid gas which has an affinity for nitrogenous substances under conditions including temperature in the range of about 20.degree. to about 90.degree. C., sufficient pressure and contacting with an immiscible phase chosen from water, immiscible solvent or mixtures thereof effective to provide removal of nitrogen-containing compounds, and (2) separating said immiscible phase containing nitrogen-containing compounds from the hydrocarbon oils.
- 2. A process according to claim 1 wherein said oil is a crude shale oil.
- 3. A process according to claim 1 wherein the amount of hydrocarbon oil per unit volume of water is in the range of from about 0.01 to about 5 volumes.
- 4. A process according to claim 1 wherein the acid gas is selected from the group consisting of carbon dioxide, hydrogen sulfide, sulfur dioxide, sulfur trioxide, hydrogen cyanide and mixtures thereof.
- 5. A process according to claim 4 wherein said pressure is an elevated pressure sufficient to provide liquid phase conditions and the gas contains at least about 20 mole percent acid gas.
- 6. A process according to claim 4 wherein the acid gas is CO.sub.2.
- 7. A process according to claim 6 wherein said CO.sub.2 is present in a CO.sub.2 -containing combustion waste stream and said hydrocarbon oil is shale oil whereby the waste stream is purified at the same time as the shale oil is upgraded.
- 8. A process according to claim 1 wherein said oil is treated at about atmospheric to about 100 atmospheres CO.sub.2 pressure.
- 9. A process according to claim 8 wherein said oil is shale oil.
- 10. A process for removing nitrogen compounds and contaminants including sulfur and metals from hydrocarbon oils which comprises contacting said compositions with aqueous acid gas which has an affinity for nitrogenous substances under extraction conditions of temperatures in a range of about 20.degree. C. to about 90.degree. C. at an elevated pressure sufficient to form a liquid water extract phase containing solubilized nitrogen-containing compounds and contaminants, removing said extract phase containing said compounds, and separating acid gas from said composition reduced in contaminants content.
- 11. A process according to claim 10 wherein said oil is shale oil and said pressure ranges from about atmospheric to about 100 atmospheres.
- 12. A process according to claim 10 wherein the acid gas is selected from the groups consisting of carbon dioxide, hydrogen sulfide, sulfur dioxide, sulfur trioxide, hydrogen cyanide and mixtures thereof.
- 13. A process according to claim 12 wherein the acid gas is CO.sub.2.
- 14. A process according to claim 13 wherein said CO.sub.2 is present in a CO.sub.2 -containing waste stream and said oil is shale oil whereby the waste stream is purified at the same time as the shale oil is upgraded.
- 15. A process according to claim 14 wherein said Co.sub.2 -containing stream contains at least about 20 mole percent Co.sub.2.
- 16. A process according to claim 13 wherein said oil is Monagas crude.
- 17. In a combination process wherein crude shale oil is contacted by the process of claim 13 with an immiscible aqueous phase containing CO.sub.2 to remove nitrogen, and other contaminants including sulfur and metals, such as arsenic, nickel and vanadium, wherein the CO.sub.2 -containing gas is thereby separated into purified streams enriched in N.sub.2 and CO.sub.2, the improvement which comprises using a CO.sub.2 -containing waste gas stream so that the waste gas stream is purified at the same time as the shale oil is upgraded.
- 18. A process according to claim 17 wherein said oil is treated at about atmospheric to about 100 atmospheres CO.sub.2 pressure.
- 19. In a combination process wherein a hydrocarbon oil containing one or more recoverable nitrogenous substances is contacted by the process of claim 13 with CO.sub.2 -containing gas in the presence of water to remove those substances and wherein the CO.sub.2 -containing gas is separated into purified streams enriched in N.sub.2 and CO.sub.2, the improvement which comprises using a CO.sub.2 -containing waste gas stream so that the waste gas stream is purified at the same time as the nitrogenous substances are recovered.
- 20. A process according to claim 16 wherein said hydrocarbon oil is treated in the presence of a water phase at about atmospheric to about 100 atmospheres CO.sub.2 pressure.
- 21. A process according to claim 20 wherein the nitrogenous substances removed include at least one selected from the group consisting of primary, secondary, and tertiary amines and nitrogen-containing heterocylic compounds.
Parent Case Info
This application is a continuation-in-part of copending application Ser. No. 304,502, filed Sept. 22, 1981 now abandoned.
US Referenced Citations (23)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1197706 |
Sep 1977 |
SUX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
304502 |
Sep 1981 |
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