Conventional propylene hydroformylation occurs in a gas-expanded liquid phase. Reliable knowledge of the phase equilibria of such systems, including the solubilities of CO and H₂ in propylene-expanded solvents, is essential for rational process design and development. Herein, we report the vapor–liquid equilibrium (VLE) data of the following ternary systems involving CO, H₂, propane, propylene, toluene and NX-795 at temperatures from 70 to 90°C and pressures up to 1.5 MPa: propane/H₂/toluene, propane/CO/toluene, propylene/H₂/toluene, propylene/CO/toluene, propane/H₂/NX-795, propane/CO/NX-795, propylene/H₂/NX-795 and propylene/CO/NX-795. The solubilities of H₂ and CO in either propane-expanded or propylene-expanded phases are observed to be greater than those in the neat organic solvents, by as high as 78% at 70°C and 1.5 MPa. By modeling the vapor and the liquid phases as pseudo-binary systems, the Peng-Robinson equation of state (PR-EoS) with van der Waals’ mixing rules and binary interaction parameters is shown to satisfactorily predict the experimental VLE data. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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氢气和一氧化碳在丙烷和丙烯膨胀的液体中的溶解度提高

常规的丙烯加氢甲酰化发生在气相膨胀的液相中。可靠地了解此类系统的相平衡，包括在丙烯膨胀的溶剂中CO和H ₂的溶解度，对于合理的工艺设计和开发至关重要。本文中，我们报告了以下三元系统的气液平衡（VLE）数据：CO，H ₂，丙烷，丙烯，甲苯和NX-795，温度范围为70至90°C，压力最高为1.5 MPa：丙烷/ H ₂ /甲苯，丙烷/ CO /甲苯，丙烯/ H ₂ /甲苯，丙烯/ CO /甲苯，丙烷/ H ₂ / NX-795，丙烷/ CO / NX-795，丙烯/ H ₂ / NX-795和丙烯/ CO / NX-795。H ₂的溶解度在丙烷膨胀或丙烯膨胀相中的CO和CO均比纯有机溶剂中的CO高，在70°C和1.5 MPa时高达78％。通过将气相和液相建模为伪二元系统，具有Van der Waals混合规则和二元相互作用参数的Peng-Robinson状态方程（PR-EoS）可以令人满意地预测实验性VLE数据。©2017美国化学工程师学会AIChE J，2017