Separating phenols from alkaline pulping spent liquors
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United States of America Patent
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Jun 17, 1980
Grant Date -
N/A
app pub date -
Mar 6, 1978
filing date -
Mar 6, 1978
priority date (Note) -
Expired
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Abstract
Phenol, ortho-cresol, meta- and para-cresols, guaiacol, vanillin, acetovanillone and other phenols are separated from alkaline pulping spent liquors by extracting the alkaline liquors with a lower aliphatic alcohol having from 2-5 carbon atoms inclusive, separating the solvent and aqueous phases, and thereafter separating the phenols from the solvent phase.
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