Development of dissolving pulp from Phyllostachys pubescens stem by prehydrolysis soda cooking with 2-methylanthraquinone

Moso bamboo (Phyllostachys pubescens) is a non-wood and non-edible biorefinery resource extremely important for the development of dissolving pulp as material regenerated cellulose fiber. However, contains high amount xylan compared to hardwoods. This study aimed at finding suitable conditions producing good quality from moso stem using combination prehydrolysis non-sulfur alkali cooking elemental chlorine-free bleaching, separating lignin product black liquor in process. Prehydrolysis 150 °C 7 h soda 160 3 with 28% active 0.06% 2-methylanthraquinone was found give outcome. The content reduced 4.0%, further treatment cold caustic extraction remove not required quality, although yield approximately 30%. then bleached obtain ?-cellulose 95.0%, brightness 89.9%, viscosity 8.8 mPa·s. Lignin dissolved easily precipitated by CO2 when employed 35% solid concentration provided 42%. precipitation followed purification pH 2.9 weight-average molecular weight, polydispersity, ash 1566, 2.62, 0.6%, respectively.