Journal ArticleDOI
Acetone-stable nanofiltration membranes in deacidifying vegetable oil
TLDR
In this article, the separation of different vegetable oil/solvent mixtures with two types of nanofiltration membranes was studied, one having a PEBAX [poly(amide-b-ether) copolymer] top layer and the other having a cellulose-type top layer.Abstract:
The separation of different vegetable oil/solvent mixtures with two types of nanofiltration membranes was studied. One type had a PEBAX [poly(amide-b-ether) copolymer] top layer, and the other had a cellulose-type top layer. These membranes were stable in acetone, ethanol, 2-propanol, and hexane, all important to the oleochemical industry. Permeabilities were highest for acetone, ±140 L/m2 · h · MPa, and lowest for hexane, which had negligible flux at 2 MPa. Permeabilities decreased with increasing triglyceride or free fatty acid (FFA) concentration. Rejection of triglycerides was constant over the concentration range tested, about 80–95%±5%, depending on the type of membrane used. These properties make membranes applicable for separating triglycerides from acetone by enhancing acetone recovery. Deacidification of triglycerides and FFA mixtures was possible (e.g., fatty acids were retained less than triglycerides). The permeate consisted almost entirely of fatty acids in acetone, and only small traces of triglycerides were found. This makes it feasible to selectively remove the fatty acids and reduce loss of triglycerides normally associated with deacidification.read more
Citations
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Journal ArticleDOI
Molecular separation with organic solvent nanofiltration: a critical review.
Journal ArticleDOI
Solvent resistant nanofiltration: separating on a molecular level
TL;DR: All SRNF-applications reported so far - in food chemistry, petrochemistry, catalysis, pharmaceutical manufacturing - will be reviewed exhaustively (324 references).
Journal ArticleDOI
Effects of polyether–polyamide block copolymer coating on performance and fouling of reverse osmosis membranes
TL;DR: In this article, the effects of a water-permeable polymer coating on the performance and fouling of high-flux (ESPA1 and ESPA3) and low-fluency (SWC4) polyamide reverse osmosis (RO) membranes were investigated.
Journal ArticleDOI
High performance organic solvent nanofiltration membranes: Development and thorough testing of thin film composite membranes made of polymers of intrinsic microporosity (PIMs)
TL;DR: In this article, thin film composite membranes of PIM-1 and PIM copolymers were developed on a polyacrylonitrile (PAN) porous support, and a simple, technically realizable method of cross-linking was produced by blending the PIM with polyethyleneimine, coating to give thin film composites (TFCs) and thermally or chemically cross-link the separation layer on the supporting membrane.
Journal ArticleDOI
State of art of the application of membrane technology to vegetable oils: A review
Cesar de Morais Coutinho,Ming Chih Chiu,Rodrigo Corrêa Basso,Ana Paula Badan Ribeiro,Lireny Aparecida Guaraldo Gonçalves,Luiz Antonio Viotto +5 more
TL;DR: In this paper, the authors present the applications and the recent development of membrane technology in the vegetable oil processing and show that oils processing with membranes, done under low temperatures, with substantial exclusion of stages, presents a promising alternative to conventional method towards the achievement of cost-effective processes that are technically advanced and less noxious to environment.
References
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Book
Basic Principles of Membrane Technology
TL;DR: In this paper, the authors introduce the concept of Membrane Fouling and discuss the properties and properties of synthetic Membranes, including material properties, properties, and processes.
Journal ArticleDOI
Deacidification of soybean oil by membrane technology
TL;DR: In this paper, free fatty acids (FFA) were extracted from a model crude vegetable oil with methanol by nanofiltration, which resulted in FFA rejection of >90% and flux of >25 Lm−2h−1.
Journal ArticleDOI
Membrane pore characterization—comparison between single and multicomponent solute probe techniques
C.M. Tam,André Y. Tremblay +1 more
TL;DR: These results indicate that solute-solute interferences occur in the permeation of mixed solutes through membrane pores, indicating that the single solute method combined with automation techniques is a preferred choice for characterizing membranes.
Journal ArticleDOI
Processing of agricultural fats and oils using membrane technology
J.B. Snape,Mitsutoshi Nakajima +1 more
TL;DR: There is currently much interest in the application of membrane technology in the agricultural fat and oil processing industry, both for oil refining and for the enzymatic modification of fats and oils using lipases, due to the mild process conditions compared with conventional technology as discussed by the authors.
Journal ArticleDOI
Solvent recovery and partial deacidification of vegetable oils by membrane technology
TL;DR: In this paper, a process using nanofiltration membranes for the partial de-solventizing and de-acidification of hexane-extracted vegetable oils was described, and the net recovery of oil was more than 99, with a simultaneous 40% reduction of FFA and over 50% reduction in the energy required for evaporation of Hexane.