Solubility of high-value compounds in ethyl lactate: Measurements and modelling

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Marina S. Manic (Author) Other; David Villanueva (Author) Other; Tiziana Fornari (Author) Other; António J. Queimada (Author) Other; Eugénia A. Macedo (Author) FEUP; Vesna Najdanovic–Visak (Author) Other

Journal

Title: Journal of Chemical Thermodynamics

Vol. 48

Pages: 93-100

ISSN: 0021-9614

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 28 Citations

Scopus - 35 Citations

Scientific classification

CORDIS: Technological sciences

FOS: Engineering and technology

Associated Projects

LA 20 - Projeto Estratégico-LA 20 - 2011-2012

Other information

Authenticus ID: P-002-AYF

DOI: 10.1016/j.jct.2011.12.005

Abstract (EN): (Solid + liquid) equilibria of binary mixtures containing high-value compounds and ethyl lactate were studied. Using the gravimetric method, the solubility of various solutes such as caffeine, vanillic acid, ferulic acid, caffeic acid and thymol in ethyl lactate was measured as a function of temperature over the range of (298.2 to 343.2) K, at atmospheric pressure. The differences in solubility of a given solute in water-saturated and dry ethyl lactate were observed. The deviation of these binary systems from ideal mixture behaviour was discussed. In order to understand the solubilization process, melting properties of pure solutes were determined by differential scanning calorimetry (DSC). The solubility data obtained were represented using UNIQUAC and UNIFAC-based models as well as with the Cubic-Plus-Association (CPA) equation of state. The results of the modeling indicate that these models are the appropriate tools for representing the solubility behaviour of various solutes in ethyl lactate.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8