Process for the regeneration of waste paper
AssigneeInterox
InventorsJean De Ceuster, Georges Papageorges
Life of this patent
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Abstract
The dry waste paper is directly fed in a disintegrator, functioning with a pulp consistency, at the disintegrator outlet, of between 20 and 50%, where it is disintegrated in the presence of an aqueous phase and at least one bleaching agent.
Claims33
In a process for the regeneration of waste paper which comprises the disintegration of the waste paper in a disintegrator directly fed from dry waste paper and functioning with a pulp consistency, at the disintegrator outlet, of between 22 and 45%, in the presence of an aqueous phase, the improvement wherein at least one peroxidic bleaching agent in an amount between 0.1 and 5% by weight of the weight of the dry waste paper is introduced into the disintegrator at the same time.
In a process for the regeneration of waste paper which comprises the disintegration of waste paper in a disintegrator directly fed with dry waste paper and functioning with a pulp consistency, at the disintegrator outlet, of between 20 and 50%, in the presence of an aqueous phase, the improvement wherein at least one peroxidic bleaching agent selected from the group consisting of hydrogen peroxide and sodium peroxide, in an amount between 0.1 and 5% by weight of the weight of the dry waste paper is introduced into the disintegrator at the same time, at least one alkaline compound is also introduced into the disintegrator, at least part of the aqueous phase is in a liquid form or in the form of steam, the consistency of the pulp at the outlet of the disintegrator is between 22 and 45%, and the temperature in the disintegrator is 70.degree. to 95.degree. C.
Dependencies are inferred from the claim text.