Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1988-07-07
1990-03-27
Killos, Paul J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562475, 562478, C07C 5900
Patent
active
049122568
ABSTRACT:
This invention relates to the production of a solid oxidized coal containing humic acids. Coal with a mean particle size of less than 3 mm is slurried with water and then oxidized with oxygen or mixtures of oxygen and air at temperatures ranging from 100.degree. to 300.degree. C., at partial oxygen pressures ranging from 0,1 to 10 MPa and reaction periods ranging from 5 to 600 minutes. In the absence of catalysts, e.g. alkaline bases, the main product of oxidation is humic acids. These humic acids are not dissolved because the pH of this slurry is in the range 4 to 9. Small amount of fulvic acids are formed and these are soluble in the water of the slurry.
The coal-derived humic acids may for example find application as soil conditioners, organic fertilisers, briquette and pellet binders, drilling fluid dispersants and viscosity control agents, while the coal-derived fulvic acids may be utilized for the production of fuel extenders, plasticizers and petrochemicals.
REFERENCES:
patent: 4788360 (1988-11-01), Calemma et al.
Killos Paul J.
National Energy Council
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