Process for improving soluble coal yield in a coal deashing process
- Oklahoma City, OK
Coal liquefaction products are contacted with a deashing solvent and introduced into a first separation zone. The first separation zone is maintained at an elevated temperature and pressure, determined to maximize the recovery of soluble coal products, to cause said coal liquefaction products to separate into a first light phase and a first heavy phase. Under these conditions the heavy phase while still fluid-like in character is substantially non-flowable. Flowability is returned to the fluid-like heavy phase by the introduction of an additional quantity of deashing solvent into the first separation zone at a location below the interface between the first light and heavy phases or into the heavy phase withdrawal conduit during withdrawal of the first heavy phase and prior to any substantial pressure reduction. The first heavy phase then is withdrawn from the first separation zone for additional downstream processing without plugging either the withdrawal conduit or the downstream apparatus. The first light phase comprising the soluble coal products is withdrawn and recovered in an increased yield to provide a more economical coal deashing process.
- Research Organization:
- Catalytic, Inc., Wilsonville, AL (USA)
- DOE Contract Number:
- EX-76-C-01-2270
- Assignee:
- Kerr-McGee Corporation (Oklahoma City, OK)
- Patent Number(s):
- US 4225420
- OSTI ID:
- 863668
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
improving
soluble
coal
yield
deashing
liquefaction
products
contacted
solvent
introduced
separation
zone
maintained
elevated
temperature
pressure
determined
maximize
recovery
separate
light
phase
heavy
conditions
fluid-like
character
substantially
non-flowable
flowability
returned
introduction
additional
quantity
location
below
interface
phases
withdrawal
conduit
prior
substantial
reduction
withdrawn
downstream
processing
plugging
apparatus
comprising
recovered
increased
provide
economical
phase comprising
coal products
coal product
location below
liquefaction products
pressure reduction
elevated temperature
coal liquefaction
separation zone
substantial pressure
stream apparatus
liquefaction product
increased yield
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