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2018, N3, pp. 109-113

A.D. Ivakhnov, N.V. Ulyanovskii, S.A. Pokryshkin, I.S. Shavrina, I.I. Pikovskoi, D.S. Kosyakov

Perspective Solvents for Lignin Depolimerization: Stability under Supercritical Conditions

Thermal stability under supercritical conditions of methanol, ethanol, 2-propanol and acetic acid, most suitable as solvents in depolymerization of technical lignins to lowmolecular aromatic compounds, was studied. Among them at 450 °C 2-propanol is the most stable. Acetic acid is almost completely decomposed within 4 h, while the addition of water significantly increases its thermal stability. Chemical composition of gaseous and liquid products of thermal decomposition of solvents was studied using gas chromatography-mass spectrometry.

Key words: monohydric alcohols, acetic acid, lignin, stability, supercritical state

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