用气相色谱分析技术 ,测定 1,2 -二氯乙烷 - 3,5-双 (三氟甲基 )溴苯二元液系的 x- y相图 ,证实该二元液系为近似理想的双液系。以拉格朗日插值公式为数学模型 ,结合计算机程序求得常压连续精馏塔的理论塔板数、实际塔板数等工艺参数。 The phase diagram of 1, 2 - dichloroethane - 3, 5 - bis (trifluoromethyl) bromobenzene binary system was determined by gas chromatography. The binary liquid system was confirmed to be nearly ideal Double fluid system. Taking Lagrange interpolation formula as the mathematical model, combined with the computer program, the technological parameters such as the theoretical plate number and the actual plate number of atmospheric continuous distillation column were obtained.