Waste paper treatment process

Details Waste paper treatment process Waste paper treatment process

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) D21H 11/14 (2006.01)

Patent

CA 2137236

2137236 9324702 PCTABS00028 A waste paper treatment process for the recycle and re-use of waste paper, which process comprises treating the waste paper , in a repulper, with a surfactant, preferably in the absence of traditional repulper chemicals such as silicate, caustic and peroxide. The surfactant is preferably a copolymer of ethylene oxide and propylene oxide, and is used in a sufficient concentration to form ink agglomerates which are retained on the paper as essentially non-visible agglomerates, rather than being removed from the recycled pulp as in traditional waste paper deinking. The process permits the elimination of normal repulper chemicals, and reduces the amount of ink sludge generated, while providing acceptable brightness levels for the recycled pulp.

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