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Control of mechanical pulp bleaching

Control of mechanical pulp bleaching Opposite to the bleaching of chemical pulp, the target in the mechanical pulp bleaching is not to remove lignin, but to keep it in pulp and remove only the chromophoric groups, thereby brightening the pulp. Two main chemicals are used, hydrogen peroxide (H2O2) and sodium hydrosulphite (sodium dithionite, Na2S2O4). An
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This page has been updated 24.11.2020