Journal of Siberian Federal University. Chemistry / Isolation, Study and Application of Organosolv Lignins (Review)

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Issue
Journal of Siberian Federal University. Chemistry. 2016 9 (4)
Authors
Kuznetsov, Boris N.; Malyar, Yuriy N.; Kuznetsova, Svetlana A.; Grishechko, Lyudmila I.; Kazachenko, Alexander S.; Levdansky, Alexander V.; Pestunov, Andrey V.; Boyandin, Anatoly N.; Celzard, Alan
Contact information
Kuznetsov, Boris N.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; ; Malyar, Yuriy N.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Grishechko, Liudmila I.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Kazachenko, Alexander S.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036 Russia; Levdansky, Alexander V.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036 Russia; Pestunov, Andrey V.: Institute of Chemistry and Chemical Technology SB RAS FRC “Krasnoyarsk Science Center SB RAS” 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia; Boyandin, Anatoly N.: Institute of Biophysics SB RAS, FRC “Krasnoyarsk Science Center SB RAS” 50/50 Akademgorodok, Krasnoyarsk, 660036, Russia; Celzard, Alan: Institut Jean Lamour, UMR CNRS – Universit´e de Lorraine no. 7198. ENSTIB 27 rue Philippe S´eguin, CS 60036, 88026 Epinal cedex, France
Keywords
organosolv lignin; isolation; structure; catalytic depolymerization; molecular weight; application; liquid hydrocarbons; aerogels
Abstract

The analysis of the literature on the methods of soluble organosolv lignins isolation, their physicalchemical study and on the method of their processing to porous aerogels and liquid hydrocarbons was carried out. A review of the literature allowed us to choice of the most important areas of research. For isolation from wood the soluble lignins free from sulfur the methods of catalytic peroxide delignification at mild conditions (temperature ≤ 100 °C, atmospheric pressure) and methods of lignin extraction by supercritical organic solvents were used. Molecular mass and molecular-mass distribution of ethanol-lignin samples isolated from aspenwood and abies-wood were studied by gel-permeation chromatography. Weighted molecular mass of ethanol-lignin from abies wood is 478 Da and that from aspen wood ethanol-lignin – 750 Da. Thus, the studied samples of ethanol-lignin have rather low molecular mass, what should facilitate their further processing to liquid hydrocarbons and aerogels. For the depolymerization of organosolv lignins to liquid hydrocarbons the processes of their catalytic conversion in supercritical alcohols have good prospects for the use. In the processes of lignin thermal conversion alcohols can to extract the products of lignin depolymerization and to alkylate these products, preventing their repolymerization to high molecular mass substances. To obtain a new class of nanoporous materials based on lignin the methods of organic aerogels synthesis from mixtures of lignin with other natural polymers and crosslinking agents were applied. It was found that the structure and properties of porous materials of aerogel type depend not only from the reaction mixture composition but from the method of drying. Drying in subcritical conditions leads to the formation of xerogels, in supercritical conditions – to the formation aerogels and the freezdrying – of cryogels. Obtained porous materials can have very low density (around 0.2 g/cm3), high specific surface area (to 500 m2/g) and the pore volume near 5 cm3/g

Pages
454-482
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/32103