Method for hydrogen peroxide bleaching of pulp
First Claim
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1. A method for pulp bleaching comprising the steps of:
- providing a pulp sample for bleaching, the pulp sample stemming from a pulp producing process;
providing a bleaching liquor comprising water and at least an organic component as solvent components constituting a bleaching medium, dissolved within are at least a bleaching agent and at least a basic agent; and
subjecting the pulp sample to the bleaching liquor for a predefined amount of time at predefined bleaching conditions;
wherein the at least an organic component amounts to at least 5% in weight of the bleaching medium.
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Abstract
Disclosed is a method for pulp bleaching. The method comprises the steps of providing a pulp sample for bleaching, the pulp sample stemming from a pulp producing process, providing a bleaching liquor comprising water and an organic component as solvent components constituting a bleaching medium, dissolved within are at least a bleaching agent, and a basic agent; and subjecting the pulp sample to the bleaching liquor for a predefined amount of time at predefined bleaching conditions. A preferred bleaching agent is hydrogen peroxide. The organic component amounts to at least 5% in weight of the bleaching medium.
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16 Claims
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1. A method for pulp bleaching comprising the steps of:
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providing a pulp sample for bleaching, the pulp sample stemming from a pulp producing process;
providing a bleaching liquor comprising water and at least an organic component as solvent components constituting a bleaching medium, dissolved within are at least a bleaching agent and at least a basic agent; and
subjecting the pulp sample to the bleaching liquor for a predefined amount of time at predefined bleaching conditions;
wherein the at least an organic component amounts to at least 5% in weight of the bleaching medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification