Ozone/peroxymonosulfate process for delignifying a lignocellulos

Details Ozone/peroxymonosulfate process for delignifying a lignocellulos Ozone/peroxymonosulfate process for delignifying a lignocellulos

1993-03-22

1995-05-02

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Gas, vapor or mist contact

162 76, 162 78, 162 89, D21C 9153, D21C 916

Patent

active

054116350

ABSTRACT:
A process for delignifying a lignocellulosic material comprising exposing the material to a mixture of peracid and ozone. Preferred peracids include Caro's acid and peracetic acid. Also disclosed is a kraft pulp delignification mixture comprising in combination: (a) water; (b) a kraft pulp at 1-40% consistency; (c) a peracid; and (d) from 0.1 to 5.0% ozone on pulp.

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Patt et al. "Einsatz von Ozon zur Zellstoffbleiche" Das papier 42, V14-V23 (1988).
Hammann et al. "Bleachability and chlorine free bleaching--Bleaching of sulfite pupls--Mill experiences" International Pulp Beaching Conference, Production of Beached Chemical Pulp in the Future, Stockholm, Sweden 3 185-200 (1991).

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