Use of chlorous acid for bleaching wood pulp

Details Use of chlorous acid for bleaching wood pulp Use of chlorous acid for bleaching wood pulp

1987-05-15

1989-01-31

Lacey, David L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 74, 162 76, D21C 318, D21C 320

Patent

active

048013536

ABSTRACT:
The present invention describes a novel method of bleaching wood pulp by using an aqueous solution containing a salt of lactic acid or citric acid and chlorous acid wherein the aqueous solution is obtained by reacting lactic acid or citric acid and sodium chlorite at a temperature ranging from about 60.degree. F. and about 80.degree. F.

REFERENCES:
patent: 1828338 (1931-10-01), Neumann
patent: 2407909 (1946-09-01), Vincent et al.

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