Pulping in the presence of a protector

Details Pulping in the presence of a protector Pulping in the presence of a protector

1981-06-17

1982-07-06

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 65, 162 70, 162 76, 162 90, D21C 300, D21C 910

Patent

active

043381588

ABSTRACT:
In a two-stage cellulosic pulping and bleaching system having first-stage pulping using standard pulping chemicals and second-stage bleaching using an alkaline oxygen system, the addition of a protector occurs only in the first stage pulping instead of between the first and second stages or in the second stage bleach. A magnesium compound is normally used as the protector.

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Manouchehri et al, "Influence of Catalysts & Inhibitors Upon the Degradation of Carbohydrates During Oxygen Bleaching", Svensk Papperstidaing, Nr. 13, 1973, pp. 486-492.
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Sinkey et al, "The Function of Magnesium Compounds in an Oxygen Alkali Carbohydrate System", Papper Och Fra, No. 5, 1974, pp. 473-486.

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