Methods of deinking secondary fibers

Details Methods of deinking secondary fibers Methods of deinking secondary fibers

D - Textiles, Paper

21

B

9/1

D21B 1/32 (2006.01) D21C 5/02 (2006.01)

Patent

CA 1151812

Abstract of the Disclosure Washing methods of deinking secondary cellulose fiber (i.e., removing unwanted non-cellulose materials therefrom) are disclosed. These washing methods (as opposed to flotation methods) generally involve deinking the fiber with surface active agent (surfactant) comprising: an oxyethylene glycol chain, wherein one terminal hydroxyl of the chain has been replaced with an ether group selected from the group consisting of an aliphatic ether group and an alkylaromatic ether group, and the other terminal hydroxyl of the chain has been replaced with an ether group selected from the group consisting of a polyoxypropylene group and a benzyl ether group. The present washing method of deinking reduces or eliminates objectionable foam, potentially provides energy savings yet maintains or improves the quality of the deinked fiber.

364507

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