PERFORMIC PULP FROM WHEAT STRAW

This paper presents an efficient method for obtaining pulp from wheat straw. The influence of the chemical reagents used and of the duration of cooking in the formic acid-hydrogen peroxide solution on the quality of performic pulp was investigated. The selectivity indexes of lignin extraction from wheat straw by performic acid were calculated. The regression equations that described adequately the dependences of the straw pulp quality indexes on the key technological parameters were calculated. The optimal values of the technological parameters for the delignification process using performic acid were determined. The mechanical properties of organosolv straw pulp confirmed its suitability for being used in the production of paper and cardboard. A lignin-carbohydrate diagram, indicating the efficiency of different delignification methods for wheat straw, was proposed.