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Process for purification of waste water produced by a Kraft process pulp and paper millThe water from paper and pulp wastes obtained from a mill using the Kraft process is purified by precipitating lignins and lignin derivatives from the waste stream with quaternary ammonium compounds, removing other impurities by activated carbon produced from the cellulosic components of the water, and then separating the water from the precipitate and solids. The activated carbon also acts as an aid to the separation of the water and solids. If recovery of lignins is also desired, then the precipitate containing the lignins and quaternary ammonium compounds is dissolved in methanol. Upon acidification, the lignin is precipitated from the solution. The methanol and quaternary ammonium compound are recovered for reuse from the remainder.
Document ID
19790009576
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Humphrey, M. F.
(JPL)
Date Acquired
September 3, 2013
Publication Date
January 16, 1979
Subject Category
Urban Technology And Transportation
Accession Number
79N17747
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,134,786|NASA-CASE-NPO-13847-2|NASA-CASE-NPO-13848-2
Patent Application
US-PATENT-APPL-SN-750798
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