CO₂-expanded hexane is used to extract phosphorus-free bio-oil from rice bran, which constitutes the main byproduct of the rice milling process, containing approximately 20–25 wt% oil. Optimal extraction conditions, namely 25 °C temperature, 5.1 MPa pressure, 0.87 CO₂ mole fraction, and 0.2 mol CO₂-expanded hexane per gram of rice bran, provide an approximate oil yield of 25%, with less than 5 ppm phosphorus. This yield exceeds the one obtained using hexane (20%), and the phosphorus concentration is 50 times lower compared to that present in the oil extracted using hexane. The extractant performances of CO₂-expanded hexane with a CO₂ mole fraction of 0.87 at 25 °C and 5.1 MPa, supercritical CO₂ at 40 °C and 20 MPa, and liquid CO₂ at 25 °C and 7 MPa were compared. The oil yield decreased in the order CO₂-expanded hexane (24.6%) > supercritical CO₂ (7.0%) > liquid CO₂ (3.2%), at 0.2 mol of solvent per gram of rice bran. Furthermore, phosphorus concentrations in the extracted oil decreased in the order CO₂-expanded hexane (3.4 ppm) > supercritical CO₂ (almost zero) = liquid CO₂ (almost zero). In summary, CO₂-expanded hexane yields a well-balanced extractant that isolates high-yield oil with a low phosphorus concentration.

CO ₂膨胀己烷用于从米糠中提取无磷生物油，米糠是碾米过程的主要副产品，含有约 20-25 wt% 的油。最佳提取条件，即每克米糠25 °C 温度、5.1 MPa 压力、0.87 CO ₂摩尔分数和 0.2 mol CO ₂膨胀己烷，提供大约 25% 的油产率，磷含量低于 5 ppm。这一产量超过了使用己烷 (20%) 获得的产量，并且磷浓度比使用己烷提取的油中的磷浓度低 50 倍。CO ₂摩尔分数为0.87的CO ₂膨胀己烷在25℃和5.1 MPa、超临界CO _{2 下}的萃取性能比较了 40 °C 和 20 MPa 下的二氧化碳，以及25 °C 和 7 MPa 下的液态 CO ₂。油收率按CO ₂膨胀己烷（24.6%）> 超临界CO ₂（7.0%）> 液体CO ₂（3.2%）的顺序降低，每克米糠0.2 mol 溶剂。此外，提取油中的磷浓度以CO ₂膨胀己烷（3.4 ppm）> 超临界CO ₂（几乎为零）= 液体CO ₂（几乎为零）的顺序降低。总之，CO ₂膨胀的己烷产生了一种平衡良好的萃取剂，可以分离出低磷浓度的高产油。