Separation of soybean oil/n-hexane and soybean oil/n-butane mixtures using ceramic membranes

Desolventizing organic solvent-soybean oil miscella using ultrafiltration ceramic membranes

“…Table 1 shows the specifications of the membranes used in this work. The choice of the membranes investigated in this work was based on previous experience of our research group [5][6][7][8][9].…”

“…The first report on membrane separation for oil/solvent mixtures was focused on using polymeric membranes, which present as main disadvantages inherent incrustation, plasticization and swelling when in contact with solutes and organic solvents, hence leading to the reduction of its industrial life time [5][6][7][8][9][10][11][12]. Ceramic membranes, in spite of the higher initial cost, present a great potential application in the separation of solutes from non-aqueous solutions, since the interactions of the solutes and solvents with the membrane ceramic material are much smaller when compared with polymeric membranes [13][14][15].…”

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

“…The performance of PVDF-10SI-1PC membrane related to oil retention was lower compared with those of Stafie et al (2004) (87-90%) and Cai et al (2011) (96%), however the permeate fluxes of PVDF-10SI-1PC were 6.0-2.7 times and 4.8 times higher than PDMS/PAN and Zeolite PDMS/PVDF membranes, respectively. Relatively lows, both the oil rejections and miscella permeation fluxes were obtained by Tres et al (2014) in their separation of soybean oil/n-hexane mixtures using UF Zircon S700-01446 (5 kDa) and UF Zircon S700-0144 (10 kDa) commercial ceramic membranes. Considering an average miscella density of 0.7-0.73 kg L -1 , the permeate flux ranged between 1.55 and 6.61 Lm -2 h -1 (5 kDa) and 1.85 and 11.6 Lm -2 h -1 (10 kDa), and the oil rejections varied between 8.0 and 40% (5 kDa) and 9.3 and 32.6% (10 kDa), within the investigated conditions (Dp of 3-5 bar; oil/solvent mass ratios of 1:1 and 1:3).…”

“…Stafie et al (2004) studied the permeation of sunflower oil/hexane mixture in polyacrylonitrile/polydimethylsiloxane composite membranes. Tres et al (2009Tres et al ( , 2014 examined several polymeric and ceramic commercial membranes for the separation of n-butane and n-hexane from refined soybean. A study on simultaneous degumming, dewaxing and decolorizing crude rice bran oil using two commercial nonporous polymeric composite hydrophobic membranes was performed by Manjula and Subramanian (2009).…”

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

“…This study is part of two studies of new technologies for extraction of essential and vegetable oils based on pressurized and liquified gases (Oliveira et al, 2012;Novello et al, 2013;Tres et al, 2009b), and the use of the membrane separation process for recovery of solvents used in such extraction processes (Oliveira et al, 2011;Tres et al, 2009aTres et al, , 2010Tres et al, , 2012aTres et al, and 2012b. The final purpose of these works is the application of this technology to aid solvent recovery in oil extraction plants.…”