Process for recovering deashing solvent from insoluble coal products
A process for effecting deashing solvent recovery from insoluble coal products and preparing a slurry of the insoluble products. An elevated temperature and pressure stream comprising insoluble coal products and deashing solvent is admixed with a makeup liquid to dilute the stream. The diluted stream is reduced in pressure and introduced into a first treatment vessel containing sufficient slurry to provide a hydrostatic pressure to prevent boiling of the diluted stream upon entry therein. The solvent then is permitted to flash and cool the remainder of the slurry. A portion of the cooled slurry is recycled to provide the makeup liquid and a second portion is introduced into a second treatment vessel to permit diffusion of solvent infused into the insoluble coal products in the slurry. The slurry of insoluble coal products in the second vessel then is introduced into a thickener to concentrate the slurry and provide a feed suitable for a gasifier.
- Assignee:
- Kerr-McGee Corp
- Patent Number(s):
- US 4313819
- OSTI ID:
- 5380291
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
CARBONACEOUS MATERIALS
COAL
DEASHING
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
LIQUEFACTION
MATERIALS
MIXTURES
RECOVERY
SEPARATION PROCESSES
SLURRIES
SOLUBILITY
SOLVENTS
SUSPENSIONS
THERMOCHEMICAL PROCESSES