Optimization of tocopherols extraction from soybean oil desodorizer distillate
DOI:
https://doi.org/10.5433/1679-0367.1999v20n2p25Keywords:
Tocopherols, Tocopherols extraction, Soybean oil distillate, Response surface methodologyAbstract
A refinery subproduct named of soybean oil Oeodorizer distillale (5000) is rich in tocopherols. In order to study the best conditions to extract the tocopherols an incomplete factorial planning was developed. Three variables were studied: volume of ether (200 lo 400 mL), KOH concentratíon (40 to 60 %) and saponification time (20 to 50 minutes). Tocopherols were determined by spectrofotomet/y at 534 nm. The best quantity of tocopherols was 3 g/100 9 from unsaponifiable matter and 28,3 g/100g of 5000 for the rate of unsaponifiable matter. The KOH concentration was the most important variable which must be higher than 50 % and less than 60 %. The best ether volumes were 200 mL and 400 mL in order to get highest quantity of tocopherols and unsaponifiable matter respectively. The saponification time can be fixed in 20 minutes.
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