Method of reducing fluorescence in deinked pulp

Details Method of reducing fluorescence in deinked pulp Method of reducing fluorescence in deinked pulp

D - Textiles, Paper

21

C

D21C 9/153 (2006.01) D21C 5/02 (2006.01)

Patent

CA 2147204

Provided herewith is a process for reducing the fluorescence of pulp fibers. The process comprises contacting the pulp fibers with ozone in two or more stages, with an intermediate washing stage or bleaching stage preferably being conducted in between the ozone contacting stages. It has been discovered that splitting the total ozone charge into two or more stages provides a much more efficient and effective process for reducing fluorescence.

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