Pecan nut cake (PNC) is residual biomass obtained as a result of cold pressing of pecan oil. PNC oil extractions using compressed carbon dioxide (C−CO₂) and compressed liquefied petroleum gas (C-LPG) were performed. The influence of extraction parameters such as pressure (15–25 MPa – C−CO₂; 1–2.5 MPa – C-LPG) and temperature (20–60 °C – C−CO₂; 20–40 °C – C-LPG) on the extraction yields and chemical profile were determined. The higher yields were achieved at 25 MPa / 20 °C (C−CO₂) and 1 MPa / 20 °C (C-LPG). The chemical profile of oils is mainly characterized by fatty acids where the oleic and linoleic acids were the majority compounds found in all samples. Contents of squalene and β-sitosterol also were obtained in the oils. The results showed that PNC is interesting biomass for oil extraction and which separation processes using compressed fluids is an attractive option for processing it.

山核桃果仁饼（PNC）是由于山核桃油的冷压而获得的残留生物质。使用压缩二氧化碳（C-CO ₂）和压缩液化石油气（C-LPG）进行PNC石油提取。萃取参数的影响，例如压力（15–25 MPa – C-CO ₂； 1–2.5 MPa – C-LPG）和温度（20–60°C – C–CO ₂； 20–40°C – C-确定了液化石油气的提取得率和化学特征。在25 MPa / 20°C（C-CO ₂）和1 MPa / 20°C（C-LPG）。油的化学特征主要由脂肪酸表征，其中所有样品中发现的大多数化合物都是油酸和亚油酸。还从这些油中获得了角鲨烯和β-谷甾醇的含量。结果表明，PNC是用于石油开采的有趣生物质，而使用压缩流体进行的分离工艺是加工该工艺的诱人选择。