Oxygen bleaching of lignocellulose

Details Oxygen bleaching of lignocellulose Oxygen bleaching of lignocellulose

C - Chemistry, Metallurgy

08

L

204/81

C08L 97/02 (2006.01) D21C 9/147 (2006.01)

Patent

CA 1274802

Abstract of The Disclosure Delignifying bleaching of lignocellulosic materials, particularly wood pulps already partly delignified by conventional alkaline pulping processes by electrochemically generated ferricyanide in the presence of an effective amount of molecular oxygen is disclosed. Attainment of low kappa numbers employing milder temperature and pressure conditions than are employed in conventional oxygen bleaching is made possible and the process may be substituted for at least a portion of the conventional chlorine based bleaching processes which are current industry standard practice for bleaching kraft pulps.

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