Process for producing high yield bleached cellulose pulp

Details Process for producing high yield bleached cellulose pulp Process for producing high yield bleached cellulose pulp

D - Textiles, Paper

21

B

8/78

D21B 1/14 (2006.01) D21C 3/26 (2006.01) D21C 9/00 (2006.01) D21D 5/02 (2006.01)

Patent

CA 1266152

16-281 Case 1462 A PROCESS FOR PRODUCING HIGH YIELD BLEACHED CELLULOSE PULP ABSTRACT OF THE DISCLOSURE A process is provided for producing high yield bleached cellulose pulp, such as groundwood pulp, thermomechanical pulp, chemimechanical pulp and waste paper pulp, having a broad field of use, which comprises bleaching cellulose pulp, thinning the pulp to a low pulp consistency; mechanically working the pulp; and fractionating the cellulose pulp into a long-fiber fraction and a fine-fiber fraction, the freeness of the long-fiber fraction exceeding the freeness of the fine-fiber fraction by from about 150 to about 600 ml C. S. F. and the fine-fiber fraction constituting from about 35 to about 70% by weight of the bleached pulp.

490360

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