Method of reducing brightness reversion and yellowness (B*) of b

Details Method of reducing brightness reversion and yellowness (B*) of b Method of reducing brightness reversion and yellowness (B*) of b

1997-09-23

2000-05-09

Alvo, Steven

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 90, D21C 320, D21C 910

Patent

active

060599278

ABSTRACT:
A method for reducing brightness reversion and yellowness (b*) of bleached mechanical wood pulps. The pulp is digested in an aqueous formaldehyde solution containing carbonate, preferably in an amount up to 30% by weight of pulp. Paper made from the digested pulp can be further improved by treating with a reversion inhibitor such as a polyethylene glycol bisthiol.

REFERENCES:
patent: 2071305 (1937-02-01), Hirschkind et al.
patent: 2071309 (1937-02-01), Hirschkind et al.
patent: 2298260 (1942-10-01), Kantorowier et al.
patent: 3124503 (1964-03-01), Zachariasen et al.
patent: 3479249 (1969-11-01), Kalisch et al.
patent: 3617435 (1971-11-01), Ealisch
patent: 4004967 (1977-01-01), Swan et al.
patent: 4016029 (1977-04-01), Samuelson
patent: 4481073 (1984-11-01), Sakai et al.
patent: 5080754 (1992-01-01), Francis et al.

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