Enzymes in combination with polyelectrolytes for enhancing the f

Details Enzymes in combination with polyelectrolytes for enhancing the f Enzymes in combination with polyelectrolytes for enhancing the f

1994-08-12

1996-03-26

Chin, Peter

Paper making and fiber liberation

Processes and products

162147, 162158, 1621682, 1621683, 162182, 162183, 162189, 162 9, 210606, 210632, 210728, 210928, D21H 2110

Patent

active

055017703

ABSTRACT:
A process for improving the freeness of paper pulp, which comprises the steps of adding to the pulp at least 0.05%, based on the dry weight of the pulp, of a cellulolytic enzyme, allowing the pulp to contact the cellulolytic enzyme for from about 40 minutes to about 60 minutes at a temperature of at least 40.degree. C., adding at least 0.011%, based on the dry weight of the pulp, of a water soluble cationic polymer, adding at least 0.007%, based on the dry weight of the pulp, of a water soluble anionic or nonionic polymer and forming the thus treated pulp into paper.

REFERENCES:
patent: 3406089 (1968-10-01), Yerkes
patent: 4923565 (1990-05-01), Fuentes
patent: 5169497 (1992-12-01), Sakar
patent: 5308449 (1994-05-01), Fuentes
Eriksson, "Swedish Developments in Biotechnology Related to the Pulp and Paper Industry", Tappi Journal, vol. 68, No. 7 (Jul. '85) pp. 46-55.

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