Recovery of humic acids

Details Recovery of humic acids Recovery of humic acids

1989-11-16

1991-04-02

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 6501

Patent

active

050048317

ABSTRACT:
A method of recovering humic acids from a material such as oxidised coal is provided. This method includes the steps of mixing the material with aqueous alkali, particularly aqueous sodium hydroxide, heating the mixture to a temperature above 100.degree. C. and below 180.degree. C. under sufficient pressure to prevent evaporation of the water, and maintaining the elevated temperature for a time, generally less than 2 hours, sufficient to extract a substantial amount of the available humic acids from the material.

REFERENCES:
CA 99(10):73701h 1983.
CA 89(1):5305a 1976.
CA 87(20):154679m.

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