METHOD AND SYSTEMS FOR BLEACHING OF LIGNOCELLULOSIC MASS AFTER COOKING WITH SODA AND ANTHRAQUINONE

摘要

FIELD: textiles, paper.SUBSTANCE: method can provide whiteness corresponding to the standard in bleaching of sulphate pulp using a similar sequence of bleaching. In some cases, the bleaching sequences may be O-A-Do-Eop-D, O-A-ZDo-Eop-D, A-Do or A-ZDo.EFFECT: conformance to standards of bleaching.23 cl, 2 tbl, 1 dwg