Concentration of ethanolic extracts from Sideritis ssp. L. by nanofiltration: Comparison of dead-end and cross-flow modes

Tsibranska, I.; Tylkowski, Bartosz

doi:10.1016/j.fbp.2012.09.004

Cited by 36 publications

(18 citation statements)

References 17 publications

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“…Another study [35] did not report significant differences in retention when comparing cross-flow and dead-end setups. In both cases, permeance decreased with increased solute loading, which confirmed an influence of mass transfer and suggest at least some concentration polarization.…”

Section: Resultsmentioning

confidence: 93%

Comparing the Performance of Organic Solvent Nanofiltration Membranes in Non‐Polar Solvents

Merlet

Winnubst

Nijmeijer

et al. 2021

Chemie Ingenieur Technik

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Organic solvent nanofiltration (OSN) is gradually expanding from academic research to industrial implementation. The need for membranes with low and sharp molecular weight cutoffs that are able to operate under aggressive OSN conditions is increasing. However, the lack of comparable and uniform performance data frustrates the screening and membrane selection for processes. Here, a collaboration is presented between several academic and industrial partners analyzing the separation performance of 10 different membranes using three model process mixtures. Membrane materials range from classic polymeric and thin film composites (TFCs) to hybrid ceramic types. The model solutions were chosen to mimic cases relevant to today's industrial use: relatively low molar mass solutes (330-550 Da) in n-heptane, toluene, and anisole.

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Section: Resultsmentioning

confidence: 93%

Comparing the Performance of Organic Solvent Nanofiltration Membranes in Non‐Polar Solvents

Merlet

Winnubst

Nijmeijer

et al. 2021

Chemie Ingenieur Technik

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“…The conventional dead-end stirring filtration system was not able to do so. 45 − 47 By using the filtration system in the present study, the flux before and after cleaning can be measured repeatedly.…”

Section: Resultsmentioning

confidence: 99%

Antifouling Membranes Prepared from Polyethersulfone Grafted with Poly(ethylene glycol) Methacrylate by Radiation-Induced Copolymerization in Homogeneous Solution

et al. 2020

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To synthesize evenly grafted copolymers, gamma radiation of homogeneous solutions was employed to graft poly(ethylene glycol) methacrylate (PEGMA) onto polyethersulfone (PES). The grafting was verified by Fourier transform infrared spectroscopy, and the degrees of grafting (DGs) were determined by elementary analysis. The PES- g -polyPEGMA copolymers with different DGs were obtained by changing the monomer concentration. Membranes were cast from pristine PES, PES/PEG blends, and PES- g -polyPEGMA with different DGs, respectively, via nonsolvent-induced phase separation. Results from water contact angle measurements and scanning electron microscopy analysis indicated that increasing DGs led to PES- g -polyPEGMA membranes with increasing hydrophilicity and porousness. Filtration experimental results showed that increasing DGs without adding pore-forming agents caused PES- g -polyPEGMA membranes with higher permeability. Compared with PES/PEG membranes with analogous permeation characteristics, in which PEG is added as a pore-forming agent, PES- g -polyPEGMA membranes exhibited superior antifouling properties.

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“…Permeate flux (J p ) was calculated by eqn 1, where V p is the permeate content accumulated, t is the time needed for accumulating V p , and A m is the effective area of membrane permeation (Mello et al, 2010;Conidi et al, 2012;Machado et al, 2013;Tsibranska & Tylkowski, 2013).…”

Section: Calculationmentioning

confidence: 99%

Concentration and purification of galacto‐oligosaccharides using nanofiltration membranes

Michelon

Manera

Carvalho

et al. 2014

Int J of Food Sci Tech

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Different substrates and different concentrations of enzyme (Maxilact LX 5000) for galacto-oligosaccharides synthesis were tested. Lactose in phosphate buffer (138 mmol/l), ultrafiltration permeate (115 mmol/l), recombined whey (136 mmol/l) were used as substrates. Concentrations of used enzyme were from 0.15 to 15 U/ml for lactose in buffer, from 0.12 U/ml to 1.5 U/ml for ultrafiltration permeate and 1.5 U/ml for recombined whey. Reaction products were analysed by HPLC. There was obtained 6.4 ± 0.4 mmol/l of galacto-oligosaccharides (GOS) for lactose in buffer, it means that 0.0633 ± 0.0025 g/g of lactose was converted to GOS. The conversions of lactose to GOS for recombined whey and ultrafiltration permeate were 0.0669 ± 0.0079 and 0.0920 ± 0.0010 g/g. There was obtained 7.3 ± 0.1 mmol/l of GOS for ultrafiltration permeate and for recombined whey 5.9 ± 0.1 mmol/l of GOS.

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Concentration of ethanolic extracts from Sideritis ssp. L. by nanofiltration: Comparison of dead-end and cross-flow modes

Cited by 36 publications

References 17 publications

Comparing the Performance of Organic Solvent Nanofiltration Membranes in Non‐Polar Solvents

Comparing the Performance of Organic Solvent Nanofiltration Membranes in Non‐Polar Solvents

Antifouling Membranes Prepared from Polyethersulfone Grafted with Poly(ethylene glycol) Methacrylate by Radiation-Induced Copolymerization in Homogeneous Solution

Concentration and purification of galacto‐oligosaccharides using nanofiltration membranes

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