Oxidative delignification of wheat straw: peroxide cooking and alkaline extraction

Abstract

The object of the study – the wheat straw cane Triticum sh., stored up in Emelianovsk region of Krasnoyarsk of the edge. The chemical composition (the mass parts): cellulose (nitro-acid method Kiurshner–Hoffer) 46.8 %; lignin (sulfur-acid method Klasson–Komarov) 22.6 %; the extractive substances (ethanol-toluene azeotrop, Sukslet apparatus) 1,22 %. The wheat straw cane was deligtnificated by the reaction mixture «acetic acid – hydrogen peroxide – sulfuracidс catalyst – water» at the sulfur acid concentration 0,45 %, liquid module 6 and temperature 85 ºC . The cellulose was grinded up to 34…36 ºShR and mixed in different relationship with the grinded up to the same degree of the grind sulfate bleached soft-wood and hard-wood cellulose of industrial production on OAS “group ILIM” (g. Bratsk, RF). The influence of the of mixed compositions compound on the main mechanical properties paper casting was studied. There are conclusion was made that technical cellulose, got from the wheat straw stated by way, can be used instead of soft-wood sulfate cellulose for production of the paper product in composition with by sulfate hard-wood cellulose without deterioration of the paper product properties.