Solubility of solids in near-critical fluids III. CHI3 and CI4 in sulphur hexafluoride

The solubilities of CHI3(s) and CI4(s) in near-critical fluid SF6 have been spectrophotometrically determined. Due to the solubilities of the two solids in SF6, a new sampling and analytical procedure had to be developed to enable their measurement in the low solvent-density region, because they wer...

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Autores principales: Marceca, E., Fernández-Prini, R.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00219614_v25_n6_p719_Marceca
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00219614_v25_n6_p719_Marceca2023-10-03T14:24:52Z Solubility of solids in near-critical fluids III. CHI3 and CI4 in sulphur hexafluoride Marceca, E. Fernández-Prini, R. The solubilities of CHI3(s) and CI4(s) in near-critical fluid SF6 have been spectrophotometrically determined. Due to the solubilities of the two solids in SF6, a new sampling and analytical procedure had to be developed to enable their measurement in the low solvent-density region, because they were below the detection limit of the previously developed spectrophotometric method. Isothermal solubility measurements were carried out under subcritical conditions in the dense liquid phase at temperature (302.20±0.01) K for CHI3 and (303.57±0.04) K for CI4, and under supercritical conditions at (322.76±0.03) K for CHI3 and (322.92±0.02) K for CI4; two isobaric runs were done for CHI3 at pressures of (3.818±0.003) MPa and (4.478±0.001) MPa. Solubilities depend strongly on p and T close to the thermodynamic state where the compressibility or thermal expansivity of the solvent pass, respectively, through a maximum. It is observed that CI4 is almost ten times less soluble than CHI3 in near-critical SF6. Moreover, the solubilities in SF6 are about ten times lower than in ethene. © 1993 Academic Press Ltd. Fil:Marceca, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fernández-Prini, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00219614_v25_n6_p719_Marceca
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The solubilities of CHI3(s) and CI4(s) in near-critical fluid SF6 have been spectrophotometrically determined. Due to the solubilities of the two solids in SF6, a new sampling and analytical procedure had to be developed to enable their measurement in the low solvent-density region, because they were below the detection limit of the previously developed spectrophotometric method. Isothermal solubility measurements were carried out under subcritical conditions in the dense liquid phase at temperature (302.20±0.01) K for CHI3 and (303.57±0.04) K for CI4, and under supercritical conditions at (322.76±0.03) K for CHI3 and (322.92±0.02) K for CI4; two isobaric runs were done for CHI3 at pressures of (3.818±0.003) MPa and (4.478±0.001) MPa. Solubilities depend strongly on p and T close to the thermodynamic state where the compressibility or thermal expansivity of the solvent pass, respectively, through a maximum. It is observed that CI4 is almost ten times less soluble than CHI3 in near-critical SF6. Moreover, the solubilities in SF6 are about ten times lower than in ethene. © 1993 Academic Press Ltd.
format JOUR
author Marceca, E.
Fernández-Prini, R.
spellingShingle Marceca, E.
Fernández-Prini, R.
Solubility of solids in near-critical fluids III. CHI3 and CI4 in sulphur hexafluoride
author_facet Marceca, E.
Fernández-Prini, R.
author_sort Marceca, E.
title Solubility of solids in near-critical fluids III. CHI3 and CI4 in sulphur hexafluoride
title_short Solubility of solids in near-critical fluids III. CHI3 and CI4 in sulphur hexafluoride
title_full Solubility of solids in near-critical fluids III. CHI3 and CI4 in sulphur hexafluoride
title_fullStr Solubility of solids in near-critical fluids III. CHI3 and CI4 in sulphur hexafluoride
title_full_unstemmed Solubility of solids in near-critical fluids III. CHI3 and CI4 in sulphur hexafluoride
title_sort solubility of solids in near-critical fluids iii. chi3 and ci4 in sulphur hexafluoride
url http://hdl.handle.net/20.500.12110/paper_00219614_v25_n6_p719_Marceca
work_keys_str_mv AT marcecae solubilityofsolidsinnearcriticalfluidsiiichi3andci4insulphurhexafluoride
AT fernandezprinir solubilityofsolidsinnearcriticalfluidsiiichi3andci4insulphurhexafluoride
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