Shejawale Deepali, Lavania Jyoti, Muthuganesan Nageswaran, Jeyarani Thangaraj, Rastogi Navin Kumar, Subramanian Rangaswamy
Food Engineering Department, CSIR-Central Food Technological Research Institute, Mysuru, 570020, India.
Academy of Scientific and Innovative Research, Ghaziabad, 201002, India.
Environ Sci Pollut Res Int. 2024 Jul 6. doi: 10.1007/s11356-024-34038-7.
Ethyl acetate, acetone, 2-propanol, 1-propanol, and ethanol were screened among the class 3 category solvents as an alternative to hexane based on operational and occupational safety and bio-renewability potential. All five solvents exhibited higher extractability (22.3 to 23.2%) than hexane (21.5%) with soybean flour. Additionally, there was no significant difference in the fatty acid and triacylglycerol (TAG) composition of the oils extracted using alternate solvents and hexane, indicating the oil quality was not affected. More importantly, ethyl acetate (2.1%) resulted in a marginally higher yield of TAG, while 2-propanol showed a nearly equal yield to hexane. Further, membrane desolventizing was attempted to mitigate the limitations of higher thermal energy requirements. One of the polydimethylsiloxane membranes exhibited good selectivity (TAG rejection 85.8%) and acceptable flux (59.3 L·m·h) with an ethyl acetate miscella system. Under plant-simulated recirculation conditions, a two-stage membrane process reduced the oil content in permeate to 2.5%. The study revealed that ethyl acetate could potentially replace hexane, considering its higher TAG extractability and suitability for the membrane-augmented solvent recycling process in the extraction plants.
基于操作和职业安全以及生物可再生潜力，在3类溶剂中筛选了乙酸乙酯、丙酮、2-丙醇、1-丙醇和乙醇作为己烷的替代品。与己烷（21.5%）相比，所有这五种溶剂对大豆粉的萃取率更高（22.3%至23.2%）。此外，使用替代溶剂和己烷萃取的油中脂肪酸和三酰甘油（TAG）的组成没有显著差异，这表明油的质量没有受到影响。更重要的是，乙酸乙酯（2.1%）使TAG的产量略高，而2-丙醇的产量与己烷几乎相当。此外，尝试采用膜脱溶来缓解热能需求较高的局限性。其中一种聚二甲基硅氧烷膜对乙酸乙酯混合体系表现出良好的选择性（TAG截留率85.8%）和可接受的通量（59.3 L·m·h）。在工厂模拟循环条件下，两级膜工艺将渗透物中的油含量降低到了2.5%。该研究表明，考虑到乙酸乙酯具有较高的TAG萃取率以及适用于萃取厂的膜增强溶剂回收工艺，它有可能替代己烷。
