Removal of nitrogen and sulfur from oil-shale
This patent describes a process for enhancing the removal of nitrogen and sulfur from oil-shale. The process consists of: (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. Also necessary is an amount sufficient to form a two-phase liquid, solid system, a temperature from about 50/sup 0/C to about 350/sup 0/C., and 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/sup 0/C to about 550/sup 0/C.
- Assignee:
- Exxon Research and Eng. Co., Florham Park, NJ
- Patent Number(s):
- US 4566965
- OSTI ID:
- 6129872
- Resource Relation:
- Patent File Date: Filed date 13 Jul 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NITROGEN
REMOVAL
OIL SHALES
DENITRIFICATION
DESULFURIZATION
SULFUR
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
GASEOUS WASTES
HIGH TEMPERATURE
HYDROXIDES
MEDIUM TEMPERATURE
PRESSURE DEPENDENCE
SHALE OIL
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DISPERSIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
MATERIALS
MINERAL OILS
MIXTURES
NONMETALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SOLUTIONS
WASTES
040404* - Oil Shales & Tar Sands- Purification