Ternary liquid-liquid equilibrium involving Ionic Liquids based in ammonium, including their synthesis and purification

Author(s)

Rafaela Rocha Pinto

• Document type: Doctoral Thesis
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Química
• Defense date: 2016-02-15

Examining board members

Roberta Ceriani; Elias Basile Tambourgi; Guilherme José Maximo; Geormenny Rocha dos Santos; Christianne Elisabete da Costa Rodrigues

• Advisor: Roberta Ceriani; Silvana Mattedi

Abstract

Ionic liquids are considered less environmental impact solvents, especially for their low vapor pressure. The goal of this work was to determine liquid liquid equilibrium (LLE) data of ternary systems with ionic liquid + water / methanol / ethanol + methyl / ethyl / propyl acetate at 25 ?C. In this work ionic liquids are protic, with simple synthesis, and were produced in our laboratory. The measurement of properties (density and refractive index) at each cloud point was the technique used to determine the calibration curves at methanol and ethanol systems and water systems, the measurement property technique was complemented by segment extrapolations between feed point and ionic liquid rich phase, through acetate phase direction. Ionic liquids are environmentally friend solvents because of their low vapor pressure. The FT-IR and RMN analysis were used for verifying the liquid salt formation. After the intended product was formation, some important industry properties were determined. Also solvent + solute molar volume were determined aiming to verify these binary mixture volumetric behavior. In fact, previously knowledge about mixture volumetric behavior can give an ideia about the use of these materials as solvents. In water and ethanol systems the three ionic liquids presented close extraction capacities, while methanol systems the lower chain ionic liquid, 2-HEAB, presented higher extraction capacity. The NRTL model and the ASOG method were used and both presented good agreement to experimental data, with global deviations around 0.90% (NRTL) and 2.68% (ASOG) (AU)

• FAPESP's process: 11/19736-1 - Liquid-Liquid Equilibrium in Ternary Systems containing Ammonium-Based Ionic Liquids, including their Synthesis and Purification
• Grantee: Rafaela Rocha Pinto
• Support Opportunities: Scholarships in Brazil - Doctorate