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Deacidification of soybean oil by membrane technology
Author(s) -
Raman L. P.,
Cheryan M.,
Rajagopalan N.
Publication year - 1996
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02523898
Subject(s) - nanofiltration , membrane , methanol , chemistry , chromatography , effluent , extractor , ultrafiltration (renal) , pulp and paper industry , permeation , waste management , organic chemistry , process engineering , biochemistry , engineering
Abstract After extracting free fatty acids (FFA) from a model crude vegetable oil with methanol, FFA were separated from methanol by nanofiltration. Of the several commercially available membranes that were evaluated, the best resulted in FFA rejection of >90% and flux of >25 Lm −2 h −1 . A combination of high‐rejection and low‐rejection membranes resulted in a retentate stream of 35% FFA and a permeate stream with less than 0.04% FFA, which can be recycled to the extractor. No alkali is required, no soapstock is formed, and almost all streams within the membrane process are recycled with little discharged as effluent.