PEROXIDE CELLULOSE FROM WHEAT STRAW

Abstract

The stalks of wheat straw (triticum sh,), stored up in Еmеlyanovsk region of the Krasnoyarsk hand edge in the form of segment in 2–3 cm treated by the water solution of hydrogen peroxide and acetic acid with the catalytic amount of the sulfuric acid under hydromodule 6. The acetic acid is oxidated to peracetic acid, which, in turn, oxidizes lignin with forming of the dissolved products. The variable technological factors and ranges of their variation: initial concentration of the acetic acid (4–8-mol/l), hydrogen peroxide (3–5-mol/l); the sulfuric acid (0.25–0.65 mass.%); the temperature (80–90 °C) and cooking duration (240–330 min). The dependencies of the dissolved lignin part, output and whiteness of the cellulose from variable factor aproximated by the regression equations of the second order. The equations used for graphic presentation results and calculation of the optimum conditions of the process. On the leading indexes (output 49–63%, whiteness before 89%, explosive length before 8700 m, forcing through resistance before 240 кPа, tear resistance 420 mN) peroxide cellulose from wheat straw with the degree of the grind 30 °ShR does not concession by specified characteristic of the sulphate unbleached cellulose from hard wood. The possibility of the cellulose reception with high whiteness after cooking will allow in the row account to refuse from high-priced following bleaching.