NASA NTRS · 19760000514
Extracting lignins from mill wastes
Abstract
Addition of quaternary ammonium compound and activated charcoal to pulp and mill wastes precipitates lignins in sludge mixture. Methanol dissolves lignins for separation from resulting slurry. Mineral acid reprecipitates lignins in filtered solution. Quaternary ammonium compound, activated charcoal, as well as water may be recovered and recycled from this process.
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Humphrey, M. F.. 1977-03-01. Extracting lignins from mill wastes. https://ntrs.nasa.gov/citations/19760000514
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