Deacidification of soybean oil by membrane technology
Деацидификация соевого масла мембранной технологией
1996-02-01
SCID: 54.1/29yx8c2p
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free fatty acidsmembrane separationmembrane technologynanofiltrationsoybean oil deacidification
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Abstract (AI)
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−2h−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.
Key Findings
1
Combining high- and low-rejection membranes produced a retentate containing 35% free fatty acids and permeate containing less than 0.04%.
2
Nanofiltration effectively separates free fatty acids from methanol after extraction from model crude vegetable oil.
3
The best commercial membrane achieved over 90% free fatty acid rejection with flux exceeding 25 L m−2 h−1.
4
The low-FFA permeate can be recycled to the extractor, enabling extensive internal stream recycling.
5
The membrane process requires no alkali, produces no soapstock, and generates minimal effluent.
Research Object
Membrane-based deacidification process for soybean oil, involving methanolic extraction and nanofiltration separation of free fatty acids
Research Subject
Free fatty acid separation performance, including membrane rejection, flux, product-stream composition, and recyclability
Publication Details
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1996-02-01
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