The separation and recovery of fatty acid alkyl esters (FAAE) is of great significance for various industries. Crystallization is a well-suited separation process for fatty acid mixtures which may be evolved by the understanding of solid-liquid equilibrium (SLE). The SLE and kinematic viscosity (v) at (T=298.15–318.15 K) and (P=0.1 mPa) for binary mixture of FAAE: methyl decanoate (1)+ethyl decanoate or methyl dodecanoate or methyl tetradecanoate (2) has been studied. The deviation in kinematic viscosity (Δv) data was derived using experimental v data. The measured SLE exhibit general single eutectic point like other organic mixtures. The SLE data fit well with universal quasi-chemical (UNIQUAC) equation. The v values were interrelated using different equations recommended by Heric-Brewer, Krishnan-Ladda, and Lulian et al. Theoretically estimated values using these empirical equations are in accordance with the experimental values with percentage standard deviation less than 0.35. The v were also analyzed by means of the McAllister equation. The Δv data were also fitted with the Redlich-Kister polynomial equation. All three binary mixtures showed negative Δv values.

脂肪酸烷基酯（FAAE）的分离和回收对各个行业都具有重要意义。结晶是脂肪酸混合物的一种非常合适的分离过程，可以通过了解固液平衡（SLE）来发展。研究了FAAE的二元混合物（癸酸甲酯（1）+癸酸乙酯或十二烷酸甲酯或十四烷酸甲酯（2））在（T = 298.15–318.15 K）和（P = 0.1 mPa）时的SLE和运动粘度（v）。 。在运动粘度（Δ的偏差v）数据是用实验导出的v的数据。与其他有机混合物一样，测得的SLE表现出一般的单共晶点。SLE数据与通用拟化学（UNIQUAC）方程非常吻合。该v值使用Heric-Brewer，Krishnan-Ladda和Lulian等人推荐的不同方程式相互关联。使用这些经验方程式的理论估计值与百分比标准偏差小于0.35的实验值一致。该v也受到了麦卡利斯特公式进行分析。该Δ v的数据也被装上瑞德利奇-Kister多项式方程。所有这三个二元混合物呈负Δ v值。