FIELD: cellulose industry. SUBSTANCE: cellulose-containing material and cooking solution are loaded into a cooking boiler and cooked therein, while hot worked out cooking solution is replaced with a liquid pumped in into the boiler under pressure and column of cellulose mass is maintained constant. Cellulose mass is further deligninified and bleached by pumping a chlorine-free bleacher through cellulose column in the boiler resulting in obtaining material suitable for production of paper ware. EFFECT: improved process. 5 cl, 1 tbl
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