Extraction of Copper by Liquid Membranes

Frankenfeld, John W.; Cahn, Robert P.; Li, Norman N.

doi:10.1080/01496398108068528

Cited by 120 publications

(31 citation statements)

References 11 publications

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“…Also the size of equipment is smaller. 40% investment savings for liquid membrane can be made as compared to solvent extraction [1]. In addition to the equipment-related advantages, there are additional advantages of using the LEM technology.…”

Section: Introductionmentioning

confidence: 99%

Extraction and Enrichment of Copper by Liquid Emulsion Membrane Using LIX 664N

Shah¹,

Tiwari²

2014

JEP

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Process intensification using liquid emulsion membranes (LEMs) for extraction of copper has been studied in this work. In LEM process the extraction and stripping processes are combined in one stage. The solubility of the solute or the chemical affinity between the solute and carrier reagent in the membrane results in the separation of the solute from the feed mixture. In this work the membrane phase comprised of LIX 664N as the extractant dissolved in kerosene and Span 80 as surfactant. The stripping phase was sulfuric acid with 180 g/l concentration and feed phase had copper concentration of 3.5 g/l. Effect of various process parameters such as batch contact time, speed of agitation, W:O ratio and treat ratio has been experimentally investigated to get better insight of the process. The maximum enrichment of copper in the internal phase obtained was 11.6 times with batch contact time of 10 minutes, agitation speed of 300 rpm and treat ratio of 6:1.

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Section: Introductionmentioning

confidence: 99%

Extraction and Enrichment of Copper by Liquid Emulsion Membrane Using LIX 664N

Shah¹,

Tiwari²

2014

JEP

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“…Frankenfeld et al 7 reported that ELM could be up to 40% cheaper than other routine solvent extraction methods. This process combines both extraction and stripping stages to perform simultaneous purification and concentration.…”

Section: Emulsion Liquid Membrane (Elm) Was Invented By LImentioning

confidence: 99%

Metabolic Fingerprints by Nano-baskets of 1,2-Alternate Calixarene and Emulsion Liquid Membranes

Bahram¹,

Pourabdollah²

2012

Bulletin of the Korean Chemical Society

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A novel approach for metabolite extraction and fingerprinting was introduced based upon the nano-baskets and emulsion liquid membrane-nuclear magnetic resonance (ELM-NMR) technique. The objective of this method is optimizing the fingerprints, minimizing the metabolic variation from analysis, increasing the likelihood differences, and obtaining the maximum extraction yield. Low molecular weight metabolites in rat serum were recovered by ELMs using 12 nano-baskets of calixarene, as both emulsifier and carrier. The yields of ELMs were optimized by the method of one-at-a-time. According to NMR data, the maximum metabolic variation was achieved using scaffold 4 (4 wt %), n-decane membrane, stirring rate of 300 rpm, treat and phase ratios of 0.3 and 0.8, respectively. The results revealed that some calixarenes tend to extract non-specific macromolecules; and repeatability of fingerprints for 7-mediated ELM was maximum and for 3-mediated ELM was minimum. The yield of extractions was obtained to be higher for n-decane and lower for carbon tetrachloride. Among different membranes, the fingerprints by chlorinated liquid membranes were more repeatable than using toluene or n-decane.

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“…

The organic emulsion membrane provides a very large interfacial area for the transport of a given component, thereby enhancing the volumetric mass transfer rate.

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confidence: 99%

Membrane‐liquid emulsion membrane process using a liquid emulsion membrane process using methane sulfonic acid as a strippant

Kulkarni¹,

Tiwari²,

Mahajani³

2002

Can J Chem Eng

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A dvanced extraction proceses, and particularly, the liquid emulsion membrane (LEM) process, have considerable economic .potential in hydrometallurgy operations where an enrichment of the extracted metal is desired despite its low levels of concentration, (Frankenfeld et at., 1981; Weiss and Crigoriev, 1982;Hayworth et at., 1983). The LEM process involves extraction and stripping in one step.The organic emulsion membrane provides a very large interfacial area for the transport of a given component, thereby enhancing the volumetric mass transfer rate. The block diagram of LEM process is depicted in Figure 1.To develop and design the LEM process, it is important to elucidate the role of the stripping agent (hereon referred to as the strippant) in the behavior of LEM. The LEM process, like any other process, has some drawbacks, such as the instability of the membrane due to swelling and breakaqe of the emulsion qlobule. Thus, the selection of a strippant is key to ihe success of the LE?M process. 'Author to whom correspondence m a y be addressed. E-moil address:The application of a liquid emulsion membrane (LEM) process in the recovery of zinc from aqueous solutions is discussed. The role of a stripping agent is very important in the LEM extraction process. Various stripping agents, such as hydrochloric, sulfuric, nitric and methane sulfonic acids, were tested for the stability of membrane. Methane sulfonic acid outperforms the other acids as a strippant. Further importance was given to the stability of the liquid emulsion membrane during the extraction process. The important variables affecting the LEM permeation process of zinc in a mechanically agitated contactor (MAC), such as residence time for extraction, speed of agitation, organic diluents, surfactant concentration and internal strip acid concentration, were systematically investigated. Emulsion swelling and breakage that occurred during these investigations were also described. Finally, the static mixer (SM) device was shown to have a very good potential for LEM extraction of zinc as it outperforms MAC.On a etudie I'application d'un procede de membrane a emulsion liquide (EM) dans la rkup6ra-tion du zinc B partir de solutions aqueuses. Le r61e de I'agent d'bpuisement est tres important dam le procede d'extraction LEM. La stabilite de la membrane a ete testee pour divers agents d'epuisement comme les acides hydrochlorique, sulfurique, nitrique et sulfonique de methane. L'acide sulfonique de methane surpasse les autres acides en tant qu'agent d'epuisement. Une plus grande importance a 6te accordee B la stabilite de la membrane a emulsion liquide lors du procede d'extraction. Les variables jouant un rde important dans le proc6de de permeation LEM du zinc dans un contacteur agite mhniquement (MAC), telles que le temps de sejour pour I'extraction, la vitesse d'agitation, les diluants organiques, la concentration de surfactant et la concentration d'acide d'epuisement interne, ont B e systematiquement etudiees. Le gonflement et la rupture de I'emulsion survenant l...

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Extraction of Copper by Liquid Membranes

Cited by 120 publications

References 11 publications

Extraction and Enrichment of Copper by Liquid Emulsion Membrane Using LIX 664N

Extraction and Enrichment of Copper by Liquid Emulsion Membrane Using LIX 664N

Metabolic Fingerprints by Nano-baskets of 1,2-Alternate Calixarene and Emulsion Liquid Membranes

Membrane‐liquid emulsion membrane process using a liquid emulsion membrane process using methane sulfonic acid as a strippant

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