INFLUENCE OF PERACETIC DELIGNIFICATION ON BIOMASS LIGNOCELLULOSIC COMPLEX. (English)

The process of delignification of plant biomass with peracetic acid was studied and the effect of the duration of peracetic delignification on the degree of delignification and the degree of removal of the carbohydrate complex in the final cellulose products was established. The treatment of different representatives of plant biomass was performed with peracetic acid at a concentration of 8% and at different time of the process. The study was focused on the process of chemical treatment of six different representatives of non-wood plant raw materials in the form of straw, agricultural waste, as well as stems of fast-growing industrial and fodder crops. Cellulose products were obtained with a yield of about 50% and a whiteness of greater than 60%. It was shown that an increase in the duration of processing naturally leads to a decrease in the yield of the final product, which is associated with the intensive oxidation and removal of lignin, as well as partial destruction of the polysaccharide component of biomass. The investigated method of delignification proved to be effective for the removal of more than 90% of lignin in the entire studied time interval, but the selectivity of the removal of lignin and carbohydrates depended significantly on the type of plant material. By an increase in the efficiency of lignin removal with peracetic acid, the studied plants are located in the following row: sverbiga (bunias orientalis)>shchavnat>lavatera>rapeseed>wheat straw>amaranth. Conducted research work gives grounds to claim that peracetic delignification is an effective method of chemical treatment of plant biomass; it allows obtaining cellulose products that can be used in the production of paper products for various purposes, as well as for the chemical industry. [ABSTRACT FROM AUTHOR]

Copyright of Issues of Chemistry & Chemical Technology / Voprosy Khimii & Khimicheskoi Tekhnologii is the property of Ukrainian State University of Chemical Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)