Main > PAPER & PULP > Pulp > Bleach > Oxygen. Ozone. Bleaching

Product Sweden. A

PATENT ASSIGNEE'S COUNTRY Sweden
UPDATE 05.00
PATENT ASSIGNEE This data is not available for free
PATENT CLAIMS Method of treating cellulose pulp comprising the steps
- Delignifying the pulp by contacting the pulp with first gas
mixt comprising oxygen
- Washing the delignified pulp by contacting the pulp with a
wash liquid
- Bleaching the washed pulp by contacting the pulp with a
second gas mixt comprising ozone & oxygen
- Regenerating the second gas mixt from the bleaching step
by contacting the second gas mixt with the wash liquid from
the washing step, said regeneration of the second gas mixt
converting CO2 in the second gas mixt into a carbonate
- Delivering at least a portion of said regenerated second
gas mixt in the form of the first gas mixt to the delignifying
step, &
- Delivering at least a portion of the wash liquid from the
regenerating step to the wash step
PATENT PHOTOCOPY Available on request

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