Method of producing oxidized white liquor from black liquor

Details Method of producing oxidized white liquor from black liquor Method of producing oxidized white liquor from black liquor

D - Textiles, Paper

21

C

D21C 11/04 (2006.01) D21C 11/00 (2006.01)

Patent

CA 2224765

White liquor produced from black liquor is partially or completed oxidized. The white liquor contains dregs that are utilized as a carbon based catalyst. Dregs are produced by separating the dregs from green liquor an intermediate product between the black liquor and the oxidized white liquor. After formation of the oxidized white liquor, the dregs are separated therefrom to form a waste dreg stream which can be recycled so that part of the dregs present within the dregs containing white liquor stream to be oxidized is contributed by the waste dreg stream.

Des liqueurs blanches produites à partir de liqueurs noires sont partiellement ou complètement oxydées. Les liqueurs blanches contiennent des dépôts utilisés comme catalyseur à base de carbon. Les dépôts sont produites en séparant ceux-ci des liqueurs vertes, un produit intermédiaire entre les liqueurs noires et les liqueurs blanches oxydées. Après la formation de liqueurs blanches oxydées, les dépôts sont séparés de celles-ci pour former un filet de dépôts de rebut pouvant être recyclé de façon à ce qu'une partie des dépôts contenant un filet de liqueurs blanches à oxydée soit fournie par le filet de dépôts de rebut.

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