Process for forming a coalate solution in-situ

Details Process for forming a coalate solution in-situ Process for forming a coalate solution in-situ

1976-08-23

1978-02-28

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166272, 166266, E21B 4324, E21B 4328

Patent

active

040760782

ABSTRACT:
This invention is a process for mining an underground formation of coal having high oxygen content by contacting the coal with a heated basic aqueous solution for a time sufficient to dissolve at least a portion of the coal formation to produce a coalate. Periodically or continuously, some of the dissolved material is removed to facilitate or improve access to the coal formation. The dissolved coal or coalate is then treated with a regenerating agent to recover basic aqueous solution from the coalate.

REFERENCES:
patent: 1532826 (1925-04-01), Lessing
patent: 2813583 (1957-11-01), Marx et al.
patent: 3734184 (1973-05-01), Scott
patent: 3775073 (1973-11-01), Rhoades
patent: 3815826 (1974-06-01), Aldrich et al.
patent: 3850477 (1974-11-01), Aldrich et al.
patent: 3858654 (1975-01-01), Walker
patent: 3973628 (1976-08-01), Colgate
Dryden, "Solvent Power for Coals at Room Temperature", Chemistry and Industry, 6-7-52, pp. 502-508.

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