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AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsPeter Daute, Berthold Schreck, Klaus Hornfeck
Estimating the term…
A process for removing printing inks from printed wastepaper in the presence of a deinking chemical is provided. In this process printed wastepaper is disintegrated to form a paper stock suspension and the detached printing ink particles are removed in known manner by flotation or washing in another stage. In this process, alkoxylates of blown oils are used as the deinking chemical. The deinking chemical is added during disintegration and/or before the flotation or washing step. Preferably, the printed wastepaper is disintegrated in the presence of 0.02 to 2% by weight and preferably 0.1 to 0.8% by weight, based on air-dry paper stock, of alkoxylates of blown oils. This deinking chemical also removed printing inks from paper circuit waters.
A process for removing printing inks from printed wastepaper comprising in disintegrating printed wastepaper to form a paper stock suspension containing detached printing ink particles and then removing said detached printing ink particles from said paper stock suspension, wherein an alkoxylate of a blown oil is present in said paper stock suspension in an amount effective to deink said paper stock suspension.
A process for removing printing inks from printed wastepaper comprising disintegrating printed wastepaper in the presence of an alkoxylate of a blown oil selected from the group consisting of ethoxylates and/or propoxylates of a blown oil in an amount of 0.02 to 2% by weight, based on air-dry paper stock to form a paper stock suspension containing detached printing ink particles and then removing said detached printing ink particles from said paper stock suspension.
A process of removing printing ink particles from paper circuit waters comprising adding an alkoxylate of a blown oil to a paper circuit water containing ink particles in an amount effective to remove said ink particles from said paper circuit water and then removing said ink particles from said paper circuit water.
Dependencies are inferred from the claim text.