Process for improving the drainage capacity of a paper pulp usin

Details Process for improving the drainage capacity of a paper pulp usin Process for improving the drainage capacity of a paper pulp usin

1990-10-01

1992-05-26

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 72, 435277, 435278, D21H 2502

Patent

active

051164744

ABSTRACT:
A process for treating paper pulp using an enzyme composition. An enzyme composition containing cellulases or hemicellulases selected from among those derived from the fungus Humicola insolens and from the bacterium Cellulomonas is made to act upon an aqueous suspesnion of the pulp possessing a given Schopper-Riegler level (SR) according to Standard NFQ 50 003. This procedure is particularly useful for treating a recycled fiber-based paper pulp having a pH of at least 5.

REFERENCES:
patent: 4923565 (1990-05-01), Fuentes et al.

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