Novel application of membrane contactors: solubility measurements of 1-hexene in solvents containing silver ions for liquid olefin/paraffin separations

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dc.contributor.authorBessarabov D.G.
dc.contributor.authorTheron J.P.
dc.contributor.authorSanderson R.D.
dc.date.accessioned2011-05-15T15:59:09Z
dc.date.available2011-05-15T15:59:09Z
dc.date.issued1998
dc.description.abstractA new method for measuring the solubility of liquid olefins in solvents containing silver ions has been proposed and tested. The method includes the use of a stationary membrane contactor containing PDMS-based polymeric membranes. Silver-ion-free solvents that have been selected for experiments (e.g., ethylene glycol and 1.3-propanediol) and which are essentially immiscible with olefins are able to dissolve silver nitrate, making it possible for them to absorb olefins due to reversible complexation of silver ions with unsaturated olefinic double bonds. The use of polymeric membranes between the two liquid phases (e.g., olefins and solvents) simplifies the solubility measurement procedure since membranes act as a semipermeable barrier between olefins and solvents. In this study the enthalpy (ΔH°) for the complex formation reaction between 1-hexene and silver nitrate in ethylene glycol and 1,3-propanediol was estimated. It was shown that 1,3-propanediol containing silver nitrate has greater sorption capacity for 1-hexene than ethylene glycol.A new method for measuring the solubility of liquid olefins in solvents containing silver ions has been proposed and tested. The method includes the use of a stationary membrane contactor containing PDMS-based polymeric membranes. Silver-ion-free solvents that have been selected for experiments (e.g., ethylene glycol and 1,3-propanediol) and which are essentially immiscible with olefins are able to dissolve silver nitrate, making it possible for them to absorb olefins due to reversible complexation of silver ions with unsaturated olefinic double bonds. The use of polymeric membranes between the two liquid phases (e.g., olefins and solvents) simplifies the solubility measurement procedure since membranes act as a semipermeable barrier between olefins and solvents. In this study the enthalpy (ΔH0) for the complex formation reaction between 1-hexene and silver nitrate in ethylene glycol and 1,3-propanediol was estimated. It was shown that 1,3-propanediol containing silver nitrate has greater sorption capacity for 1-hexene than ethylene glycol.
dc.description.versionArticle
dc.identifier.citationDesalination
dc.identifier.citation115
dc.identifier.citation3
dc.identifier.issn119164
dc.identifier.other10.1016/S0011-9164(98)00046-0
dc.identifier.urihttp://hdl.handle.net/10019.1/11026
dc.subjectChemical bonds
dc.subjectComplexation
dc.subjectEnthalpy
dc.subjectGlycols
dc.subjectLiquid membranes
dc.subjectOlefins
dc.subjectPolymeric membranes
dc.subjectSilicones
dc.subjectSilver compounds
dc.subjectSolubility
dc.subjectSolvents
dc.subjectEthylene glycol
dc.subjectHexene
dc.subjectMembrane contactors
dc.subjectPropanediol
dc.subjectSilver nitrate
dc.subjectSeparation
dc.subjecthydrocarbon
dc.subjectliquid membrane
dc.subjectseparation
dc.titleNovel application of membrane contactors: solubility measurements of 1-hexene in solvents containing silver ions for liquid olefin/paraffin separations
dc.typeArticle
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