Rice is one of the most important crops throughout the world, as it contributes toward satisfying the food demand of much of the global population. It is well known that rice production generates a considerable number of by-products, among which rice bran deserves particular attention. This by-product is exceptionally rich in nutrients, since it contains a wide spectrum of macronutrients (proteins, fats, carbohydrates) as well as dietary fibers and bioactive compounds. However, rice bran is usually wasted or just used for the production of low-cost products. The lipidic fraction of rice bran contains an unsaponifiable fraction that is rich in such functional components as tocopherols, γ-oryzanol, tocotrienols, and phytosterols. This lipidic fraction can be extracted to obtain rice bran oil (RBO), a high value-added product with unique health properties as a result of its high concentration in γ-oryzanol, a powerful antioxidant mixture of bioactive molecules. Conventional extraction methods employ hexane as the solvent, but these methods suffer from some drawbacks linked to the toxicity of hexane for humans and the environment. The aim of the review presented herein is to point out the new green technologies currently applied for the extraction of RBO, by highlighting reliable alternatives to conventional solvent extraction methods that are in line with the twelve principles of green chemistry and a circular economy.

水稻是全世界最重要的农作物之一，因为它有助于满足全球大多数人口的粮食需求。众所周知，稻米生产会产生大量副产品，其中米糠值得特别关注。该副产品含有丰富的大量营养素（蛋白质，脂肪，碳水化合物）以及膳食纤维和生物活性化合物，因此营养成分异常丰富。但是，米糠通常被浪费或仅用于生产低成本产品。米糠的脂质级分含有不可皂化的级分，其中富含诸如生育酚，γ-谷维素醇，生育三烯酚和植物甾醇的功能成分。可以提取该脂质部分以获得米糠油（RBO），一种高附加值的产品，由于其在γ-谷维素（一种高活性的生物活性分子的抗氧化剂混合物）中的高浓度而具有独特的健康特性。常规提取方法使用己烷作为溶剂，但是这些方法具有与己烷对人类和环境的毒性有关的一些缺点。本文提出的综述的目的是通过强调符合绿色化学和循环经济十二项原则的常规溶剂萃取方法的可靠替代方案，指出当前用于RBO萃取的新绿色技术。但是这些方法存在一些缺点，这些缺点与己烷对人类和环境的毒性有关。本文提出的综述的目的是通过强调符合绿色化学和循环经济十二项原则的常规溶剂萃取方法的可靠替代方案，指出当前用于RBO萃取的新绿色技术。但是这些方法存在一些缺点，这些缺点与己烷对人类和环境的毒性有关。本文提出的综述的目的是通过强调符合绿色化学和循环经济十二项原则的常规溶剂萃取方法的可靠替代方案，指出当前用于RBO萃取的新绿色技术。