resumo
The potential of ionic liquids for aromatic-aliphatic separation or removal of sulfur-containing compounds such as thiophene is well established but, in spite of a number of phase diagrams reported in the literature, the values of other properties required for process design, such as viscosities and densities, are poorly characterized for these mixtures. In this work, systems presenting a LLE with a LCST are studied. Experimental density and viscosity data for binary systems of benzene with [C(4)C(1)im][SCN], [C(4)D(1)im][CF3SO3] and [C(2)C(1)im][NTf2], and thiophene with [C(4)C(1)im][SCN] and [C(4)C(1)im][NTf2] are presented. Additionally, the liquid-liquid phase diagram for the binary system of thiophene with [C(4)C(1)im][NTf2] is also reported. The excess molar volumes and viscosity deviations were further estimated and correlated and their values discussed. (C) 2013 Elsevier B.V. All rights reserved.
palavras-chave
BINARY-SYSTEMS; ALIPHATIC-HYDROCARBONS; PHASE-EQUILIBRIA; DESULFURIZATION; EXTRACTION; AROMATICS; GASOLINE; SULFOLANE; WATER; BIS((TRIFLUOROMETHYL)SULFONYL)AMIDE
categoria
Chemistry; Physics
autores
Batista, MLS; Tome, LIN; Neves, CMSS; Gomes, JRB; Coutinho, JAP
nossos autores
Catarina Maia Seco Seiça Neves
Investigador Auxiliar
José R. B. Gomes
Investigador Principal
Luciana Isabel Nabais Tomé
Bolseiro de pós-Doutoramento
Marta Luísa Salsas Batista
Estudante de doutoramentoGrupos
G4 - Materiais Renováveis e Economia Circular
G6 - Materiais Virtuais e Inteligência Artificial
agradecimentos
The authors thank financial support from FCT-Fundacao para a Ciencia e Tecnologia, for project PEst-C/CTM/LA0011/2013 and for the grants SFRH/BPD/44926/2008, SFRH/BD/70641/2010 and SFRH/BD/74551/2010 awarded to Luciana I. N. Tome, Catarina M. S. S. Neves and Marta L. S. Batista, respectively.