1. Desolventizing of soybean oil/azeotrope mixtures using ceramic membranes
- Author
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Juliana Steffens, Marshall Palliga, Lidia Tiggeman, Jonas R.M. de Melo, J. Vladimir Oliveira, Katia Rezzadori, Marco Di Luccio, and Marcus V. Tres
- Subjects
Ceramics ,food.ingredient ,02 engineering and technology ,Micelle ,Soybean oil ,2-Propanol ,chemistry.chemical_compound ,food ,020401 chemical engineering ,Azeotrope ,Environmental Chemistry ,0204 chemical engineering ,Waste Management and Disposal ,Water Science and Technology ,Chromatography ,Ethanol ,Chemistry ,Isopropyl alcohol ,Membranes, Artificial ,General Medicine ,021001 nanoscience & nanotechnology ,Soybean Oil ,Solvent ,Hexane ,Membrane ,Solvents ,0210 nano-technology - Abstract
This work investigates the use of ceramic membranes with different molecular weight cut-offs (MWCOs: 5, 10 and 20 kDa) to desolventize azeotropic solvent mixtures (ethanol/n-hexane and isopropyl alcohol/n-hexane) from soybean oil/azeotrope micelles. Results show that a decrease in the MWCO of a membrane and an increase in the solvent mass ratio in the mixture resulted in a significant reduction in the permeate flux. The 20 kDa membrane presented the highest permeate flux, 80 and 60 kg/m2h for the soybean oil/n-hexane/isopropyl alcohol and soybean oil/n-hexane/ethanol azeotropes, respectively, for an oil to solvent ratio of 1:3 (w/w). The highest oil retention was found using the n-hexane/isopropyl alcohol azeotrope, around 25% in the membrane with the lowest MWCO, that is, 5 kDa. It is shown that the azeotropic mixtures provided intermediate characteristics compared to the original pure solvent behavior.
- Published
- 2016