Process for producing regenerated humic acids from coal

Details Process for producing regenerated humic acids from coal Process for producing regenerated humic acids from coal

1992-09-11

1993-09-28

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562465, 562478, 568761, C07C 6500

Patent

active

052488144

ABSTRACT:
Process for preparing regenerated humic acids from coal by means of the continuous oxidation on fluidized bed, characterized in that a coal of lignite, sub-bituminous or bituminous type is submitted to a preliminary oxidation under mild conditions in order to reduce the hydrogen content of said coal by an amount of 5 to 25% of hydrogen initially present in the starting coal, and that the resulting coal is subsequently submitted to an oxidation in order to produce the desired humic acids.

REFERENCES:
patent: 4788360 (1988-11-01), Calemma et al.
Industrial and Engineering Chemistry, vol. 42, No. 12 (1950), pp. 2525-2529; L. D. Friedman et al., "Humic Acids From Coal".
R. S. Montgomery et al., U.S. Bureau of Miner Information Circular: "The Caustic-Oxygen Oxidation of Bituminous Coal", No. 8234, pp. 74-98 (1963).

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