A review on olefin/paraffin separation using reversible chemical complexation technology

Azhin, Maryam; Kaghazchi, Tahereh; Rahmani, Mohammad

doi:10.1016/j.jiec.2008.04.014

Cited by 79 publications

(44 citation statements)

References 103 publications

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“…15 Hemoglobin, 16 carbonate, 17 silver, 18, 19 copper 20, 21 and ammonium salts 22 have been used as carriers in facilitated transport membranes. Among the gases transported are dioxygen, carbon dioxide, and low molecular weight alkenes (olefins).…”

Section: Introductionmentioning

confidence: 99%

“…In the context of facilitated olefin transport, silver (I) salts are the most commonly used carrier. 15 While early olefin transport studies focused on supported liquid membranes 23 and ion-exchange membranes, 19, 24 recent studies employ solid polymer membranes that function without a liquid medium. 25 These membranes typically contain ether or carbonyl functionalities that induce ion-pair separation in the carrier silver (I) salts, which aids in olefin-metal ion interaction.…”

Section: Introductionmentioning

confidence: 99%

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Ethylene Sensing by Silver(I) Salt-Impregnated Luminescent Films

2012

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Luminescent oligomers and polymers doped with silver(I) salts were used as optical sensors for ethylene and other gaseous small molecules. Films of poly(vinylphenylketone) (PVPK) or 1,4-bis(methylstyryl)benzene (BMSB) impregnated with AgBF4, AgSbF6 or AgB(C6F5)4 respond to ethylene exposures with a reversible emission quenching that is proportional to the pressure of the gas. Experiments with various analytes revealed that only gases capable of forming coordinate bonds with Ag(I) ions (i.e., ethylene, propylene and ammonia) produced a sensing response. Comparison of the effects of ethylene and tetradeuterioethylene revealed that the emission quenching was due to enhanced vibrational relaxation. The Ag(I) ions are essential to the observed optical response. The oligomer/polymer support enhances the response characteristics of the impregnated salt by promoting separation of Ag(I) from its anion, a separation that improves accessibility of the Ag(I) ion to the gaseous analytes. Salts with large lattice energies, where the anion is not dissociated from Ag(I) in the matrix, fail to sensitize film responses. Photoluminescence experiments with Ag(I)-impregnated BMSB films established that the Ag(I) ions serve to communicate the analyte-binding signal to the support by altering the support-based emission. These experiments demonstrate a sensing paradigm where simultaneous coordination of Ag(I) ions to the support matrix and to a gaseous analyte enables the optical response.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ethylene Sensing by Silver(I) Salt-Impregnated Luminescent Films

2012

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“…This transport mechanism is called facilitated or carrier-mediated transport 5 . There have been various separation objective for carrier-mediated transport using organic membrane 35,36 . The separation for this method is controlled by the extraction/back-extraction equilibrium at the interfaces and reaction kinetics between solute and solvent under a non-equilibrium mass transfer process 37 .…”

Section: -2mentioning

confidence: 99%

Rare earth element enrichment using membrane based solvent extraction

Makertiharta¹,

Dharmawijaya²,

Zunita³

et al. 2017

AIP Conference Proceedings

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Abstract. The chemical, catalytic, electrical, magnetic, and optical properties of rare earth elements are required in broad applications. Rare earth elements have similar physical and chemical properties thus it is difficult to separate one from each other. Rare earth element is relatively abundant in earth's crust but rarely occur in high concentrated deposits. Traditionally, ion-exchange and solvent extraction techniques have been developed to separate and purify single rare earth solutions or compounds. Recently, membrane starts to gain attention for rare earth separation by combining membrane and proven technologies such as solvent extraction. Membrane-based process offers selective, reliable, energy efficient and easy to scale up separation. During membrane-based separation process, one phase passes through membrane pores while the other phase is rejected. There is no direct mixing of two phases thus the solvent loss is very low. Membrane can also lower solvent physical properties requirement (viscosity, density) and backmixing, eliminate flooding phenomenon and provide large interfacial area for mass transfer. This paper will summarize research efforts in developing membrane technology for rare earth element separation. Special attention will be given to solvent extraction related process as the commonly used method for rare earth element separation. Furthermore, membrane configuration and its potentials will also be discussed.

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“…The use of membranes, cryogenic distillation, and absorption have emerged as potential methods for the separation of paraffin/olefin [2][3][4][5]. Among them, the most…”

Section: Introductionmentioning

confidence: 99%

Separation of Light Liquid Paraffin C5–C9 with Cuban Volcanic Glass Previously Used in Copper Elimination from Water Solutions

et al. 2018

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Featured Application: In this work, an inexpensive and available material, as volcanic glass, is used to absorb metals from wastewater and then it is used to the separation of light liquid-olefins.Abstract: Raw porous volcanic glass from Cuba was used as an adsorbent for Cu 2+ removal from dyes after activation with an acid solution. After Cu 2+ adsorption, it was also evaluated its capacity to separate n-paraffins from a mixture by inverse gas chromatography (IGC), and the results were compared with those obtained with bare volcanic glass without copper. The main goal of this work is to highlight the great applicability of natural volcanic glass, which can be reused without pretreatment as an adsorbent. The results from copper adsorption were quite promising, considering the availability and low cost of this material; the sample without acid treatment turned out to be the most adequate to remove copper. Moreover, the results from IGC revealed that the separation of paraffins from the mixture was achieved with both bare volcanic glass and glass containing Cu, although greater heat adsorption values were obtained when copper was present in the sample due to the stronger interaction between paraffin and copper. The high availability and low cost of this porous material make it a potential and attractive candidate to be used in both heavy metal removal and paraffin separation for industrial purposes.

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A review on olefin/paraffin separation using reversible chemical complexation technology

Cited by 79 publications

References 103 publications

Ethylene Sensing by Silver(I) Salt-Impregnated Luminescent Films

Ethylene Sensing by Silver(I) Salt-Impregnated Luminescent Films

Rare earth element enrichment using membrane based solvent extraction

Separation of Light Liquid Paraffin C5–C9 with Cuban Volcanic Glass Previously Used in Copper Elimination from Water Solutions

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