Abstract As an intensification process of the unit operation of vegetable oil extraction, the cooking pre-treatment systematically results in damaging thermal degradations. However, recently, two thermomechanical expansion processes have been suggested and applied at industrial scales to pre-treat oilseeds: expansion and instant controlled pressure drop DIC. In both cases, it is a flash transformation from high-temperature/high-pressure to 100 °C/atmospheric pressure and 33 °C/vacuum phases, respectively. The use of DIC resulted in cumulative impact yields of 247 mg oil/g db, compared to 210, 230, and 224 for cracking, cracking/blocking, and expanding, respectively. To achieve the same yields obtained in 160 min for cracked or cracked/flaked soybean, the expander took 120 min against 35 min for DIC. Besides, thanks to the short heat treatment and the induced instant cooling, DIC allowed the highest preservation of soybean oil quality, with fatty acid concentrations almost identical to that of untreated seeds. Practical impacts In the sector of the vegetal oil industry, researchers and engineers mostly look for increasing the extraction yields while preserving or improving the sensorial and biochemical quality of the oil. Henceforth, the modification of the oleaginous seed texture may usually be the major factor affecting and normally enhancing the capacity of extraction. Based on the improvement of material structure through adequate expansion, the higher the volume of vapor issued from the autovaporization throughout the instant controlled pressure-drop (DIC) technology, the higher the oil yields. Moreover, using the instantaneous thermodynamic theory, the feasibility of integrating DIC technology as an HTST treatment in the industrial-scale soybean extraction process could be performed and optimized without any biochemical degradation.

中文翻译：

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膨胀机和即时控制压降 DIC 技术作为热机械预处理在增强植物豆油溶剂提取中的比较

摘要 作为植物油提取单元操作的强化过程，蒸煮预处理系统地导致破坏性的热降解。然而，最近，已经提出并在工业规模上应用了两种热机械膨胀工艺来预处理油籽：膨胀和即时控制压降 DIC。在这两种情况下，它分别是从高温/高压到 100 °C/大气压和 33 °C/真空相的快速转变。DIC 的使用导致累积影响产量为 247 毫克油/克分贝，而裂化、裂化/阻塞和膨胀分别为 210、230 和 224。为了在 160 分钟内获得与裂解或裂解/薄片大豆相同的产量，膨胀机需要 120 分钟，而 DIC 需要 35 分钟。除了，由于短暂的热处理和诱导的即时冷却，DIC 可以最大程度地保存大豆油质量，脂肪酸浓度几乎与未经处理的种子相同。实际影响 在植物油行业，研究人员和工程师主要寻求提高提取率，同时保持或改善植物油的感官和生化质量。今后，含油种子质地的改变通常可能是影响和通常提高提取能力的主要因素。基于通过充分膨胀改善材料结构，在整个即时控制压降（DIC）技术中，自动蒸发产生的蒸汽量越大，产油率越高。而且，