Soybean oil (SO) was deacidified by liquid–liquid extraction (LLE) in a perforated rotating disc column using ethanol as solvent. The extraction assays were performed using two approaches: in the first, response surface methodology (RSM) was used to evaluate the effect of perforated discs' rotation speed and solvent hydration on the transfer of free fatty acids (T_FFA), loss of neutral oil (L_NO), and overall volumetric mass transfer coefficient (K_R·a) in assays using refined SO. In second, the best conditions from RSM were used in the degummed SO deacidification; in this case, the influence of phospholipids on the L_NO was observed. The maximization of the values of T_FFA and L_NO occurs for low water contents in the solvent, regardless of discs' rotation speed. Regarding K_R·a, both independent variables influence this response. An increase in hydration of the solvent decreases the K_R·a by decreasing the free fatty acid (FFA) diffusivity. The total deacidification of degummed SO by LLE is feasible using ethanol with 10 mass% water and a rotation speed of 150 rpm. These process conditions provided reduction on phosphorus, peroxide value, and FFA, along with a low loss of neutral oil, which was significantly lower than the values reported for the traditional process, alkali refining.

中文翻译：

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含水乙醇液液萃取法脱酸大豆油

大豆油 (SO) 通过液-液萃取 (LLE) 在穿孔旋转圆盘柱中使用乙醇作为溶剂进行脱酸。使用两种方法进行提取测定：首先，使用响应面法 (RSM) 评估穿孔圆盘的旋转速度和溶剂水合对游离脂肪酸 ( T _FFA ) 转移、中性油损失的影响( L _NO ) 和总体积传质系数 ( K _R · a ) 在使用精制 SO 的测定中。其次，在脱胶SO脱酸中采用了RSM的最佳条件；在这种情况下，磷脂对L _NO的影响被观测到。T _FFA和L _NO的值的最大值发生在溶剂中的低水含量时，与圆盘的旋转速度无关。关于K _R · a，两个自变量都会影响此响应。溶剂水合的增加会降低K _R · a通过降低游离脂肪酸 (FFA) 扩散率。LLE 对脱胶 SO 的总脱酸是可行的，使用乙醇和 10 质量%的水和 150 rpm 的转速。这些工艺条件降低了磷、过氧化值和 FFA，同时中性油损失低，显着低于传统工艺碱精炼的报告值。