Composition and Application of Soluble Products
of Wheat Straw Catalytic Oxidative Delignification
B. N. KUZNETSOV1,2, I. G. SUDAKOVA1, N. V. GARYNTSEVA1 and N. M. IVANCHENKO1
1 Institute of Chemistry and Chemical Technology, Siberian Branch of the Russian Academy of Sciences Siberian Federal University,
Ul. K. Marksa 42, Krasnoyarsk 660049 (Russia),
bnk@icct.ru
2 Institute of Chemistry and Chemical Technology, Siberian Branch of the Russian Academy of Sciences,
Pr. Svobodny 79, Krasnoyarsk 664041 (Russia)
Keywords: wheat straw, oxidative delignification, soluble products, composition, application, binders, enterosorbents
Pages: 489–495
Abstract
The composition of the soluble products of wheat straw delignification in the medium acetic acid–hydrogen peroxide–water–sulphuric acid catalyst was studied by means of elemental and chemical analysis, IR spectroscopy and gas chromatography-mass spectrometry. It was established that the vat residue formed in the regeneration of spent alkali liquor contains the products of polysaccharide degradation (4.7 rel. %), esters (19.9 rel. %) and sterols (37.2 rel. %). The acetic lignin precipitated from the alkali liquor contains a substantial amount of oxygen-containing functional groups. A promising character was demonstrated experimentally for the presently unclaimed bio-renewable resource such as wheat straw as a chemical raw material for obtaining sorbents and binders in the production of wood-based panels.
UDC 547.474:543.8:676.164
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