Ultrafiltration of vegetable oils Degumming by polymeric membranes

Ochoa, Nelio Ariel; Pagliero, Cecilia; Marchese, José Abramo; Mattea, M.

doi:10.1016/s1383-5866(00)00178-7

Cited by 86 publications

(53 citation statements)

References 9 publications

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“…Recent results (11) have shown that membranes obtained from polyvinylidene fluoride (PVDF) have good stability in hexane and acceptable permeate flux.…”

mentioning

confidence: 99%

Degumming of crude soybean oil by ultrafiltration using polymeric membranes

Pagliero

Ochoa

Marchese

et al. 2001

J Americ Oil Chem Soc

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In this study, the ability of two ultrafiltration polymeric membranes to perform the degumming of a crude soybean oil/hexane mixture is tested. The performance of both membranes is defined in terms of their permeation flux, permeate color, and rejection of phospholipids. One of the membranes was synthesized in our laboratories from polyvinylidenefluoride (PVDF); the other one is a commercially available membrane made of polyimide. The degumming experiments were done in a stirred dead-end ultrafiltration cell pressurized with N 2 . Results show that tested membranes are suitable for removing phospholipids from the crude oil/hexane miscella in the range of temperature and transmembrane pressure utilized in this work. Both membranes have high selectivity regarding phospholipids and produce a moderate reduction in permeate color. The PVDF membrane gives permeate fluxes up to threefold larger than those obtained with polyimide membrane at the same operational conditions, making the former more suitable for use at industrial scale.Paper no. J9849 in JAOCS 78, 793-796 (August 2001).

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“…Recent results (11) have shown that membranes obtained from polyvinylidene fluoride (PVDF) have good stability in hexane and acceptable permeate flux.…”

mentioning

confidence: 99%

Degumming of crude soybean oil by ultrafiltration using polymeric membranes

Pagliero

Ochoa

Marchese

et al. 2001

J Americ Oil Chem Soc

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“…The term defined by "others" include ester components other than the abovementioned esters. The virgin oil may even include some insoluble solids such as meal and metal oxides from the processing units along with significant amounts of phospholipids in the form of impurities [43,44]. The GC analysis of the VCO and WCO is shown in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Comparison of Biodiesel Obtained from Virgin Cooking Oil and Waste Cooking Oil Using Supercritical and Catalytic Transesterification

et al. 2017

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Abstract:Comparative analysis of transesterification of virgin cooking oil (VCO) and waste cooking oil (WCO) in catalyzed and supercritical transesterification process using methanol and ethanol as solvents has been conducted in this study. The luminous point of this research was the direct comparison of catalytic and supercritical process using the ester composition obtained from virgin cooking oil and waste cooking oil transesterification. Oil to alcohol molar ratio of 1:6 and reaction condition of 65 • C and 1 bar pressure were considered for the catalytic process, while 260 • C and high pressure (65 and 75 bar for methanol and ethanol, respectively) were accounted for the supercritical process. Distinct layer separation was observed for both processes. Ester, fatty acid and glycerol composition was studied for both the upper and lower layers separately, from which 100% ester composition in the upper layer and a mixture of ester and other composition in the lower layer was obtained for the catalytic process owing to succeeding filtration and washing. However, mixture of ester (>75%) and other composition was obtained in both layers for the supercritical process where purification process was not implemented. The similarity in the result obtained demonstrates the superiority of waste cooking oil compared to virgin cooking oil, taking cost into consideration.

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“…Our research group has been working in the area of membrane preparation and their applications in different vegetable oil treatment, among them, degumming of crude soybean oil/hexane mixture with UF membranes made from different polymeric material (PVDF), Polyethersulfone (PES), Polysulfone (PSf), Polyimide (PI) Ochoa et al 2001;Pagliero et al 2004); recovery of hexane from sunflower oil/hexane miscella using composite membranes of PVDF/PDMS and PVDF/cellulose acetate (CA) (Pagliero et al 2011); removal of free fatty acids (FFAs) and hexane recovery from soybean oil, combining liquid-liquid extraction (FFA separation) and NF membrane process (solvent recovery) (Fornasero et al 2013). More recently, our group has established that SRNF made from PVDF as support and PDMS as active dense layer have high selectivity for hexane recovery and a reasonable selectivity for FFAs separation (Firman et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous improvement in solvent permeability and deacidification of soybean oil by nanofiltration

et al. 2017

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In this paper, soybean oil deacidification and hexane removal using laboratory scale solvent resistance nanofiltration membranes based technique is presented. Composite nanofiltration membranes made of different polymers poly(vinylideneflouride) (PVDF), polydimethylsiloxane (SI), polycarbonate (PC), and glycerol were tested to remove the hexane and free fatty acid (FFA) from soybean oil/hexane miscella (oil feed solution 10, 25, and 35% w/w) at 20 bar of transmembrane pressure and 30°C, in a dead-end filtration set up. All membranes tested showed low fouling phenomena and high stability in the presence of hexane throughout the membrane pre-treatment and permeation procedure. The PVDF-10SI-1PC membrane showed the best performance achieving a miscella permeability of L m = 6.8 9 10 -6 L (h m bar) -1 , oil and FFA sieving efficiency of b (oil) = 0.21(80% of oil rejection) and b FFA = 2.43 (27% of FFA removal), respectively, at oil feed concentration of 25%. Apart from these specific properties, the PVDF-10SI-1PC membrane presented excellent mechanical and chemical resistances and low reversible fouling. The results demonstrate that membrane technology can attain a high efficiency in the simultaneous solvent recovery and deacidification of oil/ hexane miscella commonly processed in the soybean oil industry.

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Ultrafiltration of vegetable oils Degumming by polymeric membranes

Cited by 86 publications

References 9 publications

Degumming of crude soybean oil by ultrafiltration using polymeric membranes

Degumming of crude soybean oil by ultrafiltration using polymeric membranes

Comparison of Biodiesel Obtained from Virgin Cooking Oil and Waste Cooking Oil Using Supercritical and Catalytic Transesterification

Simultaneous improvement in solvent permeability and deacidification of soybean oil by nanofiltration

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