对于几种有工业和环保实际意义的二氧化碳混合物的临界常数进行了预测估算，这些二元混合物是：二氧化碳＋乙醇、＋乙醇胺、＋碳酸丙烯酯、＋甲酰基哌啶、＋环丁砜和＋Ｎ－甲基己内酰胺。在目前缺乏文献数据的情况下，利用经验方法估算了纯组分物质的Ｔ＿ｃ、Ｐ＿ｃ、Ｖ＿ｃ和偏心因子ω，进而预测了二氧化碳混合物在不同组成时的临界温度和临界压力，绘出各混合物近似的临界曲线（Ｐ－Ｔ图），并作了简要的讨论。 Predicting the critical constants for several carbon dioxide mixtures of practical industrial and environmental significance are: carbon dioxide + ethanol, + ethanolamine, + propylene carbonate, + formylpiperidine, + sulfolane and + N-methyl Caprolactam. In the absence of literature data, the empirical method was used to estimate the Tc, Pc, Vc and eccentricity factors of pure components, and then the critical temperature and critical pressure of the carbon dioxide mixture at different compositions were predicted. The critical curve (P-T chart), and made a brief discussion.