Barbash V.A.

Obtaining of Cellulose from Rape Straw by the Oxide-Organosolv Method of Delignification

The paper studies the cooking process of cellulose from rape straw by the oxide-organosolv method of delignification. We investigate the influence of the basic technological parameters of the process (duration, temperature, liquor/raw material ratio, concentration of peracetic acid and hydrogen peroxide, type of catalyst) on the pulp yield and properties of pulp. Crucially, we determine that application of catalysts in the process of rape straw cooking by the liquors of peracetic acid allows reducing lignin content in the pulp.

Optimization of organosolvent methods for obtaining straw pulp

The present paper considers the adequate statistical models of delignification of the wheat straw by alkaline–sylphite–alcohol, ammonium–sylphite– alcohol and double-stage alkaline–alcohol methods, using anthraguinone, obtained as a result of mathematical treatment and full factorial experiment of 22 type. Furthermore, using Harrington criterion, we carry out the search for optimal values of technological parameters. Specifically, we establish that the alkaline sulphite–alcohol method turns out to be the most suitable for obtaining straw pulp.