relative volatility
3.The present paper analyses the relative volatility of ethyl-benzene/styrene and meta-xylene/styrene and para-xylene/styrene is affected by pressure variation in ethyl-benzene/styrene packed tower, and also analyses the fractional composition is affected by pressure variation in above packed tower.
4.Through determination of the infinite relative volatility for ethane/ethylene by means of gas stripping method, the ability of the cuprous halide amine to separate ethane/ethylene is evaluated and the factors influencing the stability of the cuprous halide amine such as the basicity of ligand, diluters, ratios are studied.
5.According to the extracting temperature, the multistage operation of HS-SPME was developed, that is the operation should apply relative high extracting temperature for low volatility substance, and apply relative low extracting temperature for high volatility substance.
