Refiner bleaching with magnesium oxide and hydrogen peroxide

Details Refiner bleaching with magnesium oxide and hydrogen peroxide Refiner bleaching with magnesium oxide and hydrogen peroxide

2005-04-19

2005-04-19

Boyer, Charles (Department: 1751)

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

C162S055000, C162S026000, C162S071000, C162S024000, C162S090000, C008S109000, C008S110000, C008S111000

Reexamination Certificate

active

06881299

ABSTRACT:
Methods of bleaching mechanical pulp under alkaline conditions with hydrogen peroxide. The methods include introducing a source of magnesium ions and hydroxyl ions to a refiner. The wood particulates are refined into a pulp in the presence of the magnesium ions and hydroxyl ions, and optionally perhydroxyl ions to simultaneously refine and bleach the pulp in a refiner.

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