Comparative characteristics of microcrystalline cellulose obtained from the rice waste production of Kazakhstan

Development of methods for effective processing of reconstructive biological resources and allocation of valuable materials refers to the main tasks of science and industry. The work determines the optimal hydro module and physico-chemical properties of microcrystalline cellulose (MCC), obtained by the method of organosolvent oxidation of rice husk (RH), grown in the southern (Kyzylorda region) and southeast (Almaty region) of Kazakhstan, and it was established that the yield and the qualitative indicators of the MCC depends on the climatic and geographical features of the region, where raw materials are grown to obtain cellulose. The effective hydro module for MCC obtained from Bakanas rice husk (B-RH) was found to be 1:12 g/mL and yield was 45.0%, whereas Kyzylorda rice husk (K-RH) the effective hydromodule was 1:10 g/mL and yield found to be equal to 52.58%. During organosolvent oxidation, the selected method did not require additional processing of raw materials. It was discovered that for delignification, it takes 120 minutes of time, and the yield of MCC will be 15-18% higher than the cellulose obtained by the alkali. Rice husk is a promising alternative raw material for cellulose production and the use of the organosolvent method for obtaining an MCC is an economically advantageous and environmentally friendly method.