| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a dissolved pulp from a lignocellulosic substance where the pulp viscosity and ash content are controlled to the desired ones by one-step treatment at the last after bleaching.SOLUTION: Provided is a dissolved pulp using a lignocellulosic substance as raw material and produced by a pre-hydrolysis-alkali vapor deposition method, and also provided is a method for producing a dissolved pulp where the pulp after the pre-hydrolysis-alkali digestion-alkali digestion is bleached, a peroxide is added under acid, the same is treated, bleaching is performed preferably to 85 to 92%ISO, thereafter, hydrogen peroxide is added under acid, and treatment is performed.SELECTED DRAWING: None |
