ANALYSIS OF THE FACTORS INFLUENCING THE ULTRAFILTRATION OF AQUEOUS LARCH WOOD EXTRACTS
UDC 542.61:66.081.63:674.032.14
Abstract
The main water-extractable component of larch wood is arabinogalactan (AG). Despite a wide range of possible applications as a valuable biological product and high content in wood (up to 25% and higher), its diverse use is hampered by relatively high costs associated with isolation and purification. A significant reduction in the cost of AG can be achieved by using modern membrane technologies (in particular, ultrafiltration) in the complex processing of wood raw materials, including existing sawmill waste. Therefore, an urgent task of optimizing the AG extraction process is to analyze the factors that determine the ultrafiltration conditions of aqueous larch wood extracts and affect the AG yield and the process rate. In this paper, we studied the effect of raw material origin, membrane type and pH on the main ultrafiltration characteristics. It turned out that the origin of the raw material affects both the initial and final ultrafiltration rates. The AG yield for Siberian larch is higher than for Dahurian larch, and the highest yield was observed for secondary wood processing waste. An increase in the pH of the extract increases the ultrafiltration rate. Comparison of hydrophilic membranes based on polysulfonamide and based on a mixture of cellulose acetates, which have close pore sizes, showed the practical similarity of the main characteristics of ultrafiltration, and hydrophobic membranes based on fluoroplastic are not applicable for concentrating aqueous solutions of AG due to the low ultrafiltration rate. The results obtained will allow optimizing the process of obtaining AG in the case of its industrial implementation.
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Milyutin L.I. Khvoynyye boreal'noy zony, 2003, no. 1, pp. 6–9. (in Russ.).
Antonovskiy S.D., Kulakova V.N., Chochiyeva A.F. Khimiya drevesiny, 1971, no. 8, pp. 147–154. (in Russ.).
Patent 2002756 (RU). 1993. (in Russ.).
Patent 2143437 (RU). 1999. (in Russ.).
Patent 2620013 (RU). 2017. (in Russ.).
Patent 2256668 (RU). 2005. (in Russ.).
Patent 2413432 (RU). 2011. (in Russ.).
Patent 2384587 (RU). 2010. (in Russ.).
Patent 2447086 (RU). 2012. (in Russ.).
Patent 2454429 (RU). 2012. (in Russ.).
Malkov Yu.A., Medvedeva E.N., Babkin V.A. Khimiya rastitel'nogo syr'ya, 2018, no. 2, pp. 183–189. https://doi.org/10.14258/jcprm.2018023435. (in Russ.).
Levdanskiy V.A., Levdanskiy A.V., Kuznetsov B.N. Khimiya rastitel'nogo syr'ya, 2022, no. 4, pp. 107–113. https://doi.org/10.14258/jcprm.20220411959. (in Russ.).
Patent 2184561 (RU). 2002. (in Russ.).
Patent 2255750 (RU). 2005. (in Russ.).
Patent 2318528 (RU). 2008. (in Russ.).
Kuznetsova S.A., Danilov V.G., Kuznetsov B.N., Yatsenkova O.V., Zhizhayev A.M. Khvoynyye boreal'noy zony, 2003, no. 1, pp. 96–100. (in Russ.).
Khol'kin Yu.I. Tekhnologiya gidroliznykh proizvodstv: uchebnik dlya vuzov. [Technology of hydrolysis production: textbook for universities]. Moscow, 1989, 496 p. (in Russ.).
Patent 2114631 (RU). 1998. (in Russ.).
Medvedeva Ye.N., Fedorova T.Ye., Vanina A.S., Rokhin A.V., Yes'kova L.A., Babkin V.A. Khimiya rastitel'nogo syr'ya, 2006, no. 1, pp. 25–32. (in Russ.).
Patent 2246301 (RU). 2005. (in Russ.).
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