Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1979-09-18
1981-05-19
Smith, William F.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 30R, 162 30K, 162DIG8, 210651, D21C 1100
Patent
active
042683505
ABSTRACT:
A method for cleaning effluents from bleaching plants which use ultrafiltration for cleaning, preferably after the first extraction stage, by dividing the ultrafiltration into two stages, and between them inserting an alkali treatment stage. The high molecular chlorine compounds are thereby split into innocuous sodium chloride in the permeate from the second ultrafiltration stage, which can be returned to the extraction stage so that with the alkali excess after the splitting, it can cover all or part of its alkali requirement.
REFERENCES:
patent: 4155845 (1979-05-01), Ancelle et al.
Empire State Paper Research Institute, Research Report No. 69, 10/1/78.
Revue ATIP, vol. 28, No. 1, 1974, p. 9-15.
Eka Aktiebolag
Smith William F.
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