Coal-aqueous mixtures
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United States of America Patent
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Nov 9, 1982
Grant Date -
N/A
app pub date -
Jan 29, 1981
filing date -
Jan 29, 1981
priority date (Note) -
Expired
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Abstract
Coal-aqueous mixture characterized by having high coal solids concentrations are provided. Selected polyalkyleneoxide nonionic surfactants are employed at low concentrations to disperse coal in an aqueous carrier medium to coal solids levels of 70% by weight, or higher. The selected polyalkyleneoxide nonionic surfactants are characterized by having a high molecular weight and a hydrophilic portion comprised of at least about 100 repeating units of ethylene oxide.
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