异丁烯在水-叔丁醇混合溶剂中的溶解度

Solubility of Isobutene in Mixture Solvents of Water and Tert-Butyl Alcohol

将叔丁醇加入水中可增加异丁烯气体在水相中的溶解度,提高异丁烯水合反应速率．在压力0．60～0．74 MPa、温度335．15～358．15K、叔丁醇浓度0～2．0kmol/m^3条件下测定了异丁烯在叔丁醇水溶液中的溶解度．结果表明,叔丁醇能增加异丁烯在水中的溶解度,溶解度随温度的升高而降低．依据溶解度与温度及叔丁醇摩尔浓度的实验数据拟合得到异丁烯溶解度的关系式,并讨论了异丁烯在叔丁醇水溶液中溶解的标准偏摩尔焓及偏摩尔熵．

The solubility of isobutene in water could be enhanced by the presence of ten-butyl alcohol. Solubilities of isobutene in mixture solvents of water and ten-butyl alcohol are determined for alcohol concentrations up to 2.0 kmol/m^3 and temperature ranged from 335.15 K to 358.15 K at pressure of 0.74 MPa or 0.60 MPa, The results show that the solubilities increases with alcohol concentration and decreases with temperature at constant alcohol concentration, Isobutene solubilities in water-alcohol mixtures at 0.74 MPa has been correlated with alcohol concentration and temperature, and the absolute error of the relational expression is less than 0. 004 % under the pressure of 0.60 MPa. Partial molar enthalpies and entropies for isobutene into solvent mixtures are discussed.