Process for bleaching a mechanical pulp with hydrogen peroxide
First Claim
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1. A process for bleaching a mechanical pulp comprising:
- subjecting the mechanical pulp to oxygen, and treating the pulp with hydrogen peroxide, the hydrogen peroxide bleaching the mechanical pulp, and the oxygen reinforcing the bleaching power of the hydrogen peroxide.
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Abstract
Mechanical pulp is bleached by a treatment with hydrogen peroxide wherein prior to or simultaneously with said treatment the mechanical pulp is subject to an oxygen pressure.
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Citations
18 Claims
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1. A process for bleaching a mechanical pulp comprising:
- subjecting the mechanical pulp to oxygen, and treating the pulp with hydrogen peroxide, the hydrogen peroxide bleaching the mechanical pulp, and the oxygen reinforcing the bleaching power of the hydrogen peroxide.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A process for bleaching mechanical pulp comprising, in combination:
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introducing mechanical pulp into an enclosure;
directing oxygen into the enclosure to expose the mechanical pulp to an oxygen atmosphere; andwhile the pulp is exposed to said oxygen atmosphere, treating the mechanical pulp with an alkaline solution of hydrogen peroxide stabilized with a stabilizing agent; the hydrogen peroxide bleaching the mechanical pulp, and the oxygen reinforcing the bleaching power of the hydrogen peroxide. - View Dependent Claims (16, 17, 18)
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Specification