Mining or in situ disintegration of hard material – In situ conversion of solid to fluid – Dissolving or chemical reaction
Patent
1980-12-02
1983-01-18
Purser, Ernest R.
Mining or in situ disintegration of hard material
In situ conversion of solid to fluid
Dissolving or chemical reaction
166307, E21B 4328
Patent
active
043689221
ABSTRACT:
Underground coal is mined by sinking a hole into the coal, passing a coal solvent to the coal, and recovering a coal solution and/or dispersion products from the resulting solution or suspension.
REFERENCES:
patent: 3850477 (1974-11-01), Aldrich et al.
patent: 3990513 (1976-11-01), Perch
patent: 4032193 (1977-06-01), Drinkard et al.
Hemphill Adley W.
Lundquist, Jr. Joseph T.
McDaniel Carl V.
McDowell, Jr. William W.
McGreal Michael J.
Purser Ernest R.
W. R. Grace & Co.
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