The paper presents a mathematical description of the process of obtaining isovaleric acid by the method of extraction of roots and rhizomes of valerian, taking into account its chemical structure and the nature of the extractant. The traditional case of the extraction process, the straight line of equilibrium in the case of using an aqueous alcohol solution as an extractant and the unconventional case of using desalinated water as an extractant, which is represented by a convex equilibrium line, is substantiated. The cause of the unconventional case is the phenomenon of formation of associations between diphilic molecules of isovaleric acid and dipole molecules with water. The possibility of using ion exchange was investigated to isolate isovaleric acid from the extract of biologically active compounds. The identity of isovaleric acid obtained in this way by the gas method was confirmed chromatography.
1. Lebeda, A. F., Dzhurenko, N. Y., Ysaikyna, A. P., Sobko, V. H. (2010). Lekarstvennye rastenyia. Samaia polnaia entsyklopedyia. M.: AST-PRESS KNYHA, 496.
2. Savelieva, O. V., Vladymyrova, I. M. (2015). Analiz nomenklatury sedatyvnykh ta snodiinykh prepa-rativ v Ukraini. Farmatsevtychnyi chasopys, 3, 40-43.
3. Kovalenko, V. N., Vyktorov, A. P. (2016). Kom¬pendyum - lekarstvennye preparaty. K.: MORYON, 2270.
4. Nykytiuk, Yu. A. (2015). Ekoloho-ekono¬mich-nyi analiz suchasnoho stanu rynku likarskoi roslynnoi syrovyny v Ukraini. Zbalansovane pryrodokorystu¬vannia, 1, 12-15.
5. Yuecheng, Lv., Liang, Yi. (2014). Application of FMEA based on fuzzy multi-criteria decision making for HVAC in a pharmaceutical plant. Journal of Chemical and Pharmaceutical Research,6 (6), 1116- 1123.
6. Pavliuk, I., Dyachok, V., Novikov, V., Ilkiv, N. (2017). Kinetics of biologically active compound extraction from hops strobiles extraction cake. Chemistry & chemical technology, 11, No. 4, 487-491.
https://doi.org/10.23939/chcht11.04.487
7. Diachok, I. L., Piniazhko, O. R. (2016). Roz-roblennia metodu kilkisnoho vyznachennia orhanichnykh kyslot v kompleksnomu fitopoliekstrakti. Aktualni pytannia farmatsevtychnoi i medychnoi nauky ta prak-tyky, № 2, 52-57.
8. Derzhavna farmakopeia Ukrainy: v 3 t. DP (2014). Ukr. nauk. farmakopeinyi tsentr yakosti likars¬kykh zasobiv. 2-he vyd. Kharkiv. 416.
9. Korotkova, T. H., Kozlova, M. O. (2017). Fa-zovoe ravnovesye smesy "voda-yzovaleryanovaia kyslota". Sovershenstvovanye metodolohyy poznanyia v tseliakh razvytyia nauky: sb. statei mezhdunar. nauchno-prakt. konferentsyy: v 3 chastiakh, 2, 84-87.
10. Derzhavna farmakopeia Ukrainy (2001). Der-zhavne pidpryiemstvo "Naukovo-ekspertnyi farmako-peinyi tsentr". Pershe vyd. Kharkiv: RIREH. 556 s.