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Showing 1 to 17 of 17 for “"Pervaporation"”.
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Pervaporation applications in food processing
… was to investigate the potential application of pervaporation to the manufacture of grape juice essence and the extraction of diacetyl from aqueous solutions. The main findings of this study were: (1) It is indeed possible to manufacture grape juice essence by pervaporation. Starting with a 150x …
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Hybrid organic-inorganic pervaporation membranes for desalination
… problems of RO technology. In the later context, pervaporation is a potential membrane technology as it has the advantage that the energy need is essentially independent of the concentration of the salt feed water. The pervaporation process combines the evaporation of volatile components of a …
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Separation of various organic-organic and aqueous-organic solutions via pervaporation
Pervaporation, an energy saving separation process, can be useful in pharmaceutical processing. However, the organic solvents involved in pharmaceutical product synthesis are chemically demanding; very few polymers are able to withstand them. An ideal membrane would be polymeric having a high …
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The Use of Solubility Parameters to Select Membrane Materials for Pervaporation of Organic Mixtures
… screening potential membrane materials for the pervaporation of a model solution containing linalool and linalyl acetate (major components of lavender essential oil), in ethanol. Published HSP values were collated for various polymers, and statistically analysed to determine variations in HSP …
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ZSM-5/thermoplastic polyurethane mixed matrix membranes for pervaporation of dilute aqueous organic solvents
… mixed matrix membranes (MMMs) for efficient pervaporation of n-butanol and ethanol from dilute aqueous solutions as a cheap and easy to fabricate replacement for the benchmark polydimethylsiloxane (PDMS) membranes. Binary systems of n-butanol-water and ethanol-water were tested along with a …
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Separation of liquid mixtures by membranes.
… interface, morphology and transport involved in pervaporation and reverse osmosis separation of liquid mixtures. The first part of this study concerns pervaporation separation of liquid mixtures. A fluorine-containing surface modifying macromolecule (SMM) was added into a polyethersulfone (PES) …
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Membrane Drying of Ionic Liquid
… characteristics is studied.</p><p>Pervaporation is a membrane separation process which has been developed for the recovery of dilute solutes from aqueous or organic bulk solvents. The removal of water from aqueous RTIL solutions using pervaporation is reported here. The driving …
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Synthese und Charakterisierung von Block- und Copolymermembranen zur Auftrennung von Aromaten/Aliphaten-Mischungen
… Gemischen durch das Membranverfahren der Pervaporation werden an die aktive Membran besondere Anforderungen gestellt. Zwei Faktoren sind neben der Langzeitstabilität von grundlegendem Interesse: der transmembrane Fluss und die Trennleistung. Die vorliegende Arbeit beschäftigt sich mit der …
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Synthesis of a Highly Porous Polyethylene Membrane Support by Electrospinning- Optimization of the Parameters Involved
… fiber mat,which was to be used as a membrane in pervaporation. For the first time,chlorobenzene combined with tetraoctyl ammonium bromide salt was used as asolvent for electrospinning polyethylene. Polyethylene fiber mat was generated by solution electrospinning technique, and by maintaining the …
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A new software tool to environmentally and economically evaluate solvent recovery in the pharmaceutical industry
… was evaluated. Fractional distillation and pervaporation were considered to separate binary solvent waste mixtures. Optimum distillation reflux ratio and feed stage were determined to maximize the environmental impact reductions and operating cost savings. The optimum reflux ratio was …
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Síntese e caracterização de filmes de polietileno/poli(álcool vinílico) contendo nanopartículas de negro de fumo e sílica
… properties were determined by swelling and pervaporation tests, and the results are discussed in terms of the basic mechanism of sorption-diffusion. A binary model organic solution was used as a gasoline model in the permeability tests. There was obtained HDPE/PVA films crosslinked with 30% …
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Controlled emulsion droplet solvent evaporation for particle production
… We introduce membrane emulsification and pervaporation as operations that have the potential to be integrated into such a process. We develop a population balance model to describe the transport of solvent from nanocrystal- or polymer-laden droplets in an emulsion as it flows through a …
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Biorefining Sewage for Energy and Green Chemicals
… two-stage fermentation process and the use of a pervaporation-electrodialysis system for the recovery of VFAs from primary sewage (PS).<br/><br/>THS was found to be an unsuitable substrate for biohydrogen production, despite using operational parameters known to inhibit methanogenic activity …
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Development of micro-scale and automated membrane extraction systems for water analysis
… by interfacing continuous membrane extraction, pervaporation and on-line HPLC-UV detection. Organics from a water sample were extracted into an organic solvent, and then concentrated via pervaporation prior to HPLC-UV detection. Factors affecting the system performance were studied. With …
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Technische, ökonomische und ökologische Bewertung der Einsetzbarkeit von biogenem n-Butanol im Raumwärmemarkt
… die in-situ Produktabtrennung mittels Pervaporation. Die Produktionskosten im Fortschrittsszenario betragen 0,99 € / L n-Butanol. Durch den Einsatz von n-Butanol als Biokomponenten in Heizöl EL sinken die Emissionen an CO2-Äquivalenten im Fortschrittsszenario auf 23,5 g / MJ und etwa 60 …
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Enhanced membrane distillation : analytical and deionization applications
… but prevents passage of the liquid phase. Unlike pervaporation, which also relies on differential vapor pressure, MD also involves the transfer of a significant amount of heat across the membrane. MD processes to date have demonstrated several inefficiencies that cause it to be a relatively low …
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Recuperación de compuestos volátiles a partir de subproductos de marisco mediante fluidos supercríticos y pervaporación
Los concentrados aromáticos son muy utilizados actualmente en la Industria Alimentaria ya que el aroma es un factor determinante en la elección y aceptación de un alimento por parte de los consumidores. Los consumidores demandan, cada vez más, aromas naturales, entendiendo como tales aquellos …