Optimization of tocopherol concentration process from soybean oil deodorized distillate using response surface methodology.
Optimization of tocopherol concentration process from soybean oil deodorized distillate using response surface methodology.
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DOI：
10.1007/978-1-60327-181-3_72
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发表时间：
2007-04
影响因子：
3
通讯作者：
Vanessa Mayumi Ito;C. B. Batistella;M. Maciel;R. M. Filho
中科院分区：
文献类型：
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作者：
Vanessa Mayumi Ito;C. B. Batistella;M. Maciel;R. M. Filho
大豆油脱臭馏出物是大豆油精炼过程中得到的产品，富含高附加值产品。这些不皂化物的回收具有巨大的商业利益，因为在许多情况下，“有价值的产品”具有维生素活性，例如生育酚（维生素E），以及抗癌特性，例如甾醇。分子蒸馏在浓缩生育酚方面具有很大的潜力，因为它由于真空度高和分离操作时间短而使用非常低的温度，而且不使用溶剂。然后，它可以用于分离和纯化热敏材料，如维生素。在这项工作中，分子蒸馏过程应用于生育酚浓缩，并使用响应面方法来优化残余物和馏出液中游离脂肪酸（FFA）的消除和生育酚浓度，这两者都是分子蒸馏器的产品。研究的自变量是进料流量 (F) 和蒸发器温度 (T)，因为根据以往的经验，它们是非常重要的过程变量。 F 的实验范围为 4–12 mL/min，T 的实验范围为 130–200°C。值得注意的是，进料流量和蒸发器温度是 FFA 消除中的重要操作变量。为了减少残渣流中FFA的损失，应改变操作范围，提高蒸发器温度并降低进料流量；D/Fratio增加，提高蒸发器温度并降低进料流量。在低进料流速值和高蒸发器温度下，在残余物流中获得了高浓度的生育酚。这些结果是通过基于实验设计的实验结果获得的。
Soybean oil deodorized distillate is a product derived from the refining process and it is rich in high value-added products. The recovery of these unsaponifiable fractions is of great commercial interest, because of the fact that in many cases, the “valuable products” have vitamin activities such as tocopherols (vitamin E), as well as anticarcinogenic properties such as sterols. Molecular distillation has large potential to be used in order to concentrate tocopherols, as it uses very low temperatures owing to the high vacuum and short operating time for separation, and also, it does not use solvents. Then, it can be used to separate and to purify thermosensitive material such as vitamins.In this work, the molecular distillation process was applied for tocopherol concentration, and the response surface methodology was used to optimize free fatty acids (FFA) elimination and tocopherol concentration in the residue and in the distillate streams, both of which are the products of the molecular distiller. The independent variables studied were feed flow rate (F) and evaporator temperature (T) because they are the very important process variables according to previous experience. The experimental range was 4–12 mL/min forFand 130–200°C forT. It can be noted that feed flow rate and evaporator temperature are important operating variables in the FFA elimination. For decreasing the loss of FFA, in the residue stream, the operating range should be changed, increasing the evaporator temperature and decreasing the feed flow rate;D/Fratio increases, increasing evaporator temperature and decreasing feed flow rate. High concentration of tocopherols was obtained in the residue stream at low values of feed flow rate and high evaporator temperature. These results were obtained through experimental results based on experimental design.