Production of oxidized humic acids by an oxygen-alkali process
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United States of America Patent
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Nov 18, 1997
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N/A
app pub date -
Jan 26, 1996
filing date -
Jan 26, 1996
priority date (Note) -
Expired
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Abstract
A method is disclosed for the production of oxidized humic acids. The process of the invention comprises reacting humic acid bearing ores with oxygen under alkaline conditions at a temperature between 100.degree. C. and 200.degree. C. for at least 1/2 hour, but usually for 1-2 hours, to produce oxidized humic acids which are soluble at pH as low as 2.9 and which are formed in yields of at least 70%. The oxidized humic acids produced according to the process of the invention are also superior viscosity reducers.
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