A green one-step process of obtaining microcrystalline cellulose by catalytic oxidation of wood

• Published in: Reaction kinetics, mechanisms and catalysis Vol. 104; no. 2; pp. 337 - 343
• Main Authors: Kuznetsov, Boris N., Kuznetsova, Svetlana A., Danilov, Vladimir G., Yatsenkova, Olga V., Petrov, Andrey V.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.12.2011
• Subjects: Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Physical Chemistry; H; Wood; Combined oxidation-hydrolysis; SO; catalyst; Microcrystalline cellulose
• ISSN: 1878-5190; 1878-5204
• DOI: 10.1007/s11144-011-0354-8

A green one-step catalytic process of obtaining microcrystalline cellulose (MCC) from wood in the medium “acetic acid–hydrogen peroxide–water” in the presence 2% wt. sulfuric acid catalyst is described. The influence of wood nature and conditions of the process on the yield, composition and structure of obtained samples of MCC was investigated. For hardwood (aspen wood and birch wood) the minimal content of residual lignin (<1% wt.) was achieved under the following conditions: temperature 130 °C, the concentration of H 2 O 2 4% wt., the concentration of CH 3 COOH ~ 26% wt., liquor ratio of 10 and the process time of 3 h. At these conditions, the degree of delignification of softwood (spruce wood and larch wood) is lower than for hardwood. According to X-ray and FTIR data, the structure of MCC samples obtained from wood is close to that of MCC Avicel and MCC from cotton linter.