Authors: A.I. Moiseev, S.Yu. Lyrshchikov, O.V. Smotrina, S.I. Zherebtsov, Z.R. Ismagilov

Title of the article: Influence of conditions of Tyulgan brown coal extraction on montan resins fragment-group composition

Year: 2019, Issue: 5, Pages: 28-36

Branch of knowledge: 05.17.07 Chemical technology of fuel and high-energy substances

Index UDK: 665.73

DOI: 10.26730/1999-4125-2019-5-28-36

Abstract: This paper is devoted to the study of resins as relatively poorly studied object. The influence of the process conditions on the fragment-group composition of the resins is investigated using the example of extraction products of Tulgansky brown coal. Resins obtained under different conditions are fractionated by sequential treatment with sodium bicarbonate and alkali solutions. The fragment-group composition of the obtained samples are investigated by ¹³C NMR spectroscopy in a solid. When extraction was carried out under more hard conditions, it was found to lead to strong destruction of the aliphatic part of the resins with the formation of short-chain fragments. In addition, as a result of the interaction of ketones and aldehydes of the resin with the alcohol of the extracting mixture, acetal groups are formed, the quantity of which reflects the balance between their synthesis and hydrolysis.
The similarity of the fragment-structural composition of resins and humic substances is noted, and on this basis an assumption is made about the possibility of resins and resin fractions to show the phytostimulating activity.

Key words: brown coal montan resins NMR-spectroscopy structural parameters humic substances

Receiving date: 25.09.2019

Publication date: 31.12.2019

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