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US 4,376,032 AGranted
Coal Liquefaction desulfurization process
AssigneeInternational Coal Refining Company
InventorEdwin N. Givens
Life of this patent
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Abstract
In a solvent refined coal liquefaction process, more effective desulfurization of the high boiling point components is effected by first stripping the solvent-coal reacted slurry of lower boiling point components, particularly including hydrogen sulfide and low molecular weight sulfur compounds, and then reacting the slurry with a solid sulfur getter material, such as iron. The sulfur getter compound, with reacted sulfur included, is then removed with other solids in the slurry.
Claims11
An improved process for preparing desulfurized solvent refined coal liquefaction products comprising the steps of:
- (a) forming a slurry of comminuted coal and a hydrogen donor solvent,
- (b) reacting said slurry with hydrogen at elevated temperature and pressure to dissolve a portion of said coal and to form a reacted mixture comprising said slurry, gases and a solution containing volatile and non-volatile solvent refined coal products,
- (c) separating said gases and said volatile products having an ambient pressure boiling point below about 450.degree. F. from said reacted mixture to form a devolatilized reacted mixture,
- (d) desulfurizing the remaining portion of said devolatilized reacted mixture by contacting the same with a solvent insoluble sulfur getter, for a time and under conditions sufficient for said getter to react with sulfur in said devolatilized reacted mixture to form getter-sulfur solids and desulfurized solvent refined coal products herein, and
- (e) separating said getter-sulfur solids and other insoluble solids remaining in said devolatilized reacted mixture from said desulfurized solvent refined coal products.
2 more elements
Dependencies are inferred from the claim text.