Mineral oils: processes and products – By treatment of solid mineral – e.g. – coal liquefaction – etc. – Using molten additive – e.g. – heat carrier – etc.
Patent
1989-12-19
1992-02-04
Myers, Helane
Mineral oils: processes and products
By treatment of solid mineral, e.g., coal liquefaction, etc.
Using molten additive, e.g., heat carrier, etc.
44621, 44622, 44624, 44627, 44608, 44620, 208405, 423DIG12, 201 17, C10G 100
Patent
active
050857649
ABSTRACT:
In a process for reducing the sulfur and ash contents of coal, coal is sequentially contacted with fused alkali metal caustic, wash water, and acid. Contacting the coal with the caustic produces water-soluble compounds. Sufficient wash water is used to reduce the temperature of the caustic treated coal and dissolve the bulk of the water-soluble compounds before the water-soluble compounds convert to water-insoluble compounds that precipitate on the caustic-treated coal. Caustic removed from the coal by the water is recovered as anhydrous caustic for again contacting coal.
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Hart Walter D.
McClanathan Loren C.
Meyers Robert A.
Farber Michael B.
Goldstein Sol L.
Myers Helane
TRW Inc.
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