Natural Colorants from Cosmos Sulphureus Cav. and Tagetes Erecta L.: Extraction And Characterization

Edia Rahayuningsih(1*), Dyah A Wikansari(2), Hendrik Setiawan(3)

(1) Chemical Engineering Department, Engineering Faculty, Universitas Gadjah Mada, Jl. Grafika no. 2 Kampus UGM, Yogyakarta, Indonesia 55281
(2) Chemical Engineering Department, Engineering Faculty, Universitas Gadjah Mada, Jl. Grafika no. 2 Kampus UGM, Yogyakarta, Indonesia 55281
(3) Chemical Engineering Department, Engineering Faculty, Universitas Gadjah Mada, Jl. Grafika no. 2 Kampus UGM, Yogyakarta, Indonesia 55281
(*) Corresponding Author


Ionic liquids demonstrated successful potential applications in the industry most specifically as the new generation of solvents for catalysis and synthesis in chemical processes, thus knowledge of their physico-chemical properties is of great advantage. The present work presents a mathematical correlation that predicts density of binary mixtures of ionic liquids with various alcohols (ethanol/methanol/1-propanol). The artificial neural network algorithm was used to predict these properties based on the variations in temperature, mole fraction, number of carbon atoms in the cation, number of atoms in the anion, number of hydrogen atoms in the anion and number of carbon atoms in the alcohol. The data used for the calculations were taken from ILThermo Database. Total experimental data points of 1946 for the considered binaries were used to train the algorithm and to test the network obtained. The best neural network architecture determined was found to be 6-6-10-1 with a mean absolute error of 48.74 kg/m3. The resulting correlation satisfactorily represents the considered binary systems and can be used accurately for solvent related calculations requiring properties of these systems.


Carotenoid, Extraction, Cosmos sulphureus Cav., Tagetes erecta L., Optimization

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ASEAN Journal of Chemical Engineering  (print ISSN 1655-4418; online ISSN 2655-5409) is published by Chemical Engineering Department, Faculty of Engineering, Universitas Gadjah Mada.