Purification of structured lipids using SCCO2 and membrane process

Moura, J. M. L. N. de; Gonçalves, Lireny Aparecida Guaraldo; Sarmento, Luiz Alberto Vieira; Petrus, José Carlos Cunha

doi:10.1016/j.memsci.2007.04.035

Cited by 32 publications

(15 citation statements)

References 24 publications

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“…The results obtained for oil fluxes are comparable to those reported for polymeric and inorganic ultra-and nanofiltration membranes (Ribeiro et al, 2006;Carvalho et al, 2006). Moura et al (2007) tested reverse osmosis membranes (BW30 -4040, DOW) and nanofiltration (DL404 -HL4040 and C -F, Osmonics) poly (amide) (PA) membranes in the permeation of triacylglycerols and free fatty acids/ethyl esters in supercritical CO 2 . Feed pressures of 90, 110 and 130 bar were investigated, with TMP's in the range of 7 to 40 bar.…”

Section: Oil/n-butane Mixture Separation and Module Integrity Testssupporting

confidence: 79%

Solvent recovery from soybean oil/n-butane mixtures using a hollow fiber ultrafiltration membrane

Tres

Racoski

Nóbrega³

et al. 2014

Braz. J. Chem. Eng.

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-The aim of this work was the study on the separation of soybean oil/n-butane mixtures using a commercial hollow fiber ultrafiltration membrane (50 kDa). Oil/n-butane mixtures with mass ratios of 1:1 and 1:3 (wt), with the feed pressures of 5, 7 and 10 bar and transmembrane pressure of 1 bar were studied. Rejections of oil between 21 to 97.2%, oil fluxes between 0.04 and 0.98 kg/m 2 h and n-butane fluxes between 4 and 46 kg/m 2 h were observed, strongly influenced by the feed concentration. The increase in oil/n-butane mass ratio caused an increase in oil rejection and a decrease in the permeate flux of oil for most assays. The increase in the operating pressure caused an increase in oil flux and a consequent decrease in oil rejection. No degradation was observed in the membrane module during the operation with this non-aqueous feed stream, as confirmed by integrity tests.

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Section: Oil/n-butane Mixture Separation and Module Integrity Testssupporting

confidence: 79%

Solvent recovery from soybean oil/n-butane mixtures using a hollow fiber ultrafiltration membrane

Tres

Racoski

Nóbrega³

et al. 2014

Braz. J. Chem. Eng.

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“…As mentioned above, pressure and density have a close relation, and the extraction effect becomes higher when pressure is high. Several authors have investigated the extraction and purification of lipid compounds, such as triacylglycerols, free fatty acids, and sterols, using scCO 2 [29]- [33]. It is anticipated that lower molecular weight polymer chains are extracted properly at 14 MPa, and it seems that the oil which dissolved in the scCO 2 effectively replace shorter polymer chains, and is impregnated.…”

Section: Effect Of Pressure On Impregnation Of Poly(l-la) Random Copomentioning

confidence: 99%

Supercritical Fluid Impregnation of Essential Bark Oil in Copolymers of L-Lactide with 7-Membered Cyclic Compounds

Tsutsumi

Hara²,

Ueno³

et al. 2014

JBNB

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In order to develop a novel controlled-release material, we previously attempted to impregnate poly(L-lactide) (poly(L-LA)), poly(L-LA-ran-CL) (CL: ε-caprolactone) or poly(L-LA-ran-TEMC) (TEMC: tetramethylene carbonate) with low boiling point, organic useful compounds using supercritical carbon dioxide (scCO2) as the solvent. In this work, the factors influencing impregnation of poly (L-LA) random copolymers with useful compounds were investigated under scCO2 using the copolymers previously used. The influence of temperature, pressure, and time on the impregnation contents of the useful compounds on the copolymers was evaluated. The polymer used, which is a base of this material, was poly(L-LA-ran-CL), poly(L-LA-ran-TEMC), or poly(L-LA-ran-DXO) (DXO: 1,5-dioxepan-2-one). Statistical random copolymers of L-LA with CL, TEMC, or DXO were synthesized using Sn(oct)2 as a catalyst at 150˚C for 24 h without solvent. Preparation of the controlled-release materials was carried out using essential bark oil from Thujopsis dolabrata var. hondae and synthetic L-LA random copolymers as a base material under scCO2. The impregnation experiment, which investigated the influence of pressure, was conducted in the range of 10 to 20 MPa. The influence of temperature on impregnation was carried out at 40˚C to 100˚C. Impregnation time was varied from 1 to 5 h.

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“…Sepa GE, Sepa GH, Sepa GK and NF90 membranes presented no measurable flux at all. This fact might be attributed to membrane hydrophilicity, which may have hindered the permeation of the solution, or even by the high viscosity of the oil/n-butane mixture [30]. It is also worth noticing that the system oil/n-butane presents high mutual miscibility at mild pressures [29].…”

Section: Membrane Selectionmentioning

confidence: 99%