Process for producing bleached pulp
Provided are a method for producing bleached pulp, comprising processing unbleached pulp obtained by cooking a lignocellulose substance, for alkali-oxygen bleaching followed by treatment with peroxomonosulfuric acid and thereafter by multistage chlorine-free bleaching treatment starting from chlorin...
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| creator | UESUGI WAKANA UCHIDA YOSUKE KAWAE AYANO TOMODA IORI CHO TAKAHIRO KOSHITSUKA TETSUO NAGATANI HIROYUKI |
| description | Provided are a method for producing bleached pulp, comprising processing unbleached pulp obtained by cooking a lignocellulose substance, for alkali-oxygen bleaching followed by treatment with peroxomonosulfuric acid and thereafter by multistage chlorine-free bleaching treatment starting from chlorine dioxide treatment; a method for producing bleached pulp, comprising processing the unbleached pulp for alkali-oxygen bleaching followed by chlorine-free bleaching treatment or totally chlorine-free bleaching treatment to bleach it to a degree of brightness of from 70 to 89%, and further followed by treatment with peroxomonosulfuric acid; and paper produced by the use of the bleached pulp produced according to these production methods, at a papermaking pH of at most 6. Provided are the efficient production methods for bleached pulp in which the color reversion resistance is enhanced in chlorine-free bleaching and the bleaching cost increase is prevented, and the paper produced by the use of the bleached pulp according to an acid papermaking process. |
| format | Patent |
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Provided are the efficient production methods for bleached pulp in which the color reversion resistance is enhanced in chlorine-free bleaching and the bleaching cost increase is prevented, and the paper produced by the use of the bleached pulp according to an acid papermaking process.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | APPARATUS THEREFOR PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES |
| title | Process for producing bleached pulp |
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