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Process for producing low-sulfur boiler fuel by hydrotreatment of solvent deashed SRC

Patent ·
OSTI ID:865550
;
In this invention, a process is disclosed characterized by heating a slurry of coal in the presence of a process-derived recycle solvent and passing same to a dissolver zone, separating the resultant gases and liquid/solid products therefrom, vacuum distilling the liquid/solids products, separating the portions of the liquid/solids vacuum distillation effluent into a solid ash, unconverted coal particles and SRC material having a boiling point above 850.degree. F. and subjecting same to a critical solvent deashing step to provide an ash-free SRC product. The lighter liquid products from the vacuum distillation possess a boiling point below 850.degree. F. and are passed through a distillation tower, from which recycled solvent is recovered in addition to light distillate boiling below 400.degree. F. (overhead). The ash-free SRC product in accompanyment with at least a portion of the process derived solvent is passed in combination to a hydrotreating zone containing a hydrogenation catalyst and in the presence of hydrogen is hydroprocessed to produce a desulfurized and denitrogenized low-sulfur, low-ash boiler fuel and a process derived recycle solvent which is recycled to slurry the coal in the beginning of the process before heating.
Research Organization:
International Coal Refining Company, Allentown, PA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-78OR03054
Assignee:
International Coal Refining Company (Allentown, PA)
Patent Number(s):
4,534,847
Application Number:
06/571,311
OSTI ID:
865550
Country of Publication:
United States
Language:
English

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