Cyclopentane is an important basic chemical raw material. Because its ozone depletion potential and global warming potential are zero, it can be used to replace CFCs. It is widely used in the production of fluorine-free refrigerators, freezers, cold storage, pipeline insulation and other fields.
Cyclopentane / 2,2-dimethylbutane system is not only an azeotropic system, but also an azeotropic system. In industry, the common separation methods are extractive distillation, azeotropic distillation and extraction. Traditionally, single solvent is used as extractant in extraction. In recent years, some scholars began to study the use of mixed solvent as extractant. Lee and brown in the United States developed the extractive distillation method using mixed solvent, and some scholars in China have carried out relevant research. However, so far, there are few studies and detailed technical data reports on the extractant screening of cyclopentane / 2,2-dimethylbutane system at home and abroad, and there is a lack of systematic and feasible vapor-liquid equilibrium data of the system.