Method for treating a paper pulp with an enzyme solution

Details Method for treating a paper pulp with an enzyme solution Method for treating a paper pulp with an enzyme solution

1992-07-20

1994-05-03

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

435277, 435278, D21H 1721

Patent

active

053084497

ABSTRACT:
An enzyme preparation containing cellulases and/or hemicellulases is reacted on a homogeneous aqueous suspension of paper pulp having a Schopper-Riegler (SR) degree determined in accordance with standard NFQ 50 003 of at least equal to 25. A paper pulp based on recycled fibers is treated.

REFERENCES:
patent: 3041246 (1962-06-01), Bolaski et al.
patent: 3406089 (1968-10-01), Yerkes
patent: 3616222 (1971-10-01), Dashinger
patent: 3972775 (1976-08-01), Wilke et al.
patent: 4451567 (1984-05-01), Ishibashi et al.
Rilon et al.; "Increasing Water Retention of Mechanical Pulps By Biological Treatments", Tappi, Jun. 1982, pp. 93-96.
McGill "Measurement and Control in Papermaking"; Adam Hilger Ltd, Bristol p. 238, 1980.
MacDonald et al. "Pulp and Paper Manufacture, Vol. II"; McGraw Hill Book Company, Sect. 9-46-9-48, 1969.

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