Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Patent
1979-11-27
1982-04-20
Alvo, Marc S.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
423478, 423506, C01B 1102, D21C 914
Patent
active
043257836
ABSTRACT:
The adverse effects of dissolved organic material in the aqueous phase of pulp suspensions during bleaching using mixtures of chlorine dioxide and chlorine are overcome by applying the chlorine dioxide and chlorine serially to the pulp in two steps without an intermediate wash. An aqueous solution of chlorine dioxide and chlorine in which the chlorine constitutes from about 6 to about 10% of the total available chlorine of the solution is used in the first step and chlorine is used in the second step. The aqueous solutions are formed by dissolving in water chlorine dioxide and chlorine formed in a chlorine dioxide generator.
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Rapson W. Howard
Reeve Douglas W.
Alvo Marc S.
Erco Industries Limited
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