Solvent recovery in pulp bleaching with ozone

Details Solvent recovery in pulp bleaching with ozone Solvent recovery in pulp bleaching with ozone

1994-12-05

1996-04-16

Lacey, David L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 65, 162 77, D21C 9153

Patent

active

055079130

ABSTRACT:
A process for bleaching pulp by impregnating the pulp with an aqueous organic solvent medium and then bleaching in an ozone stage (Z stage) to form a bleached pulp characterized in that organic solvent in the organic solvent medium accompanying the pulp through the ozone stage is neutralized and stripped from the bleached pulp leaving the ozone stage and the separated organic solvent is recovered for reuse.

REFERENCES:
patent: 4100016 (1978-07-01), Diebold et al.

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