C5혼합물에서 π-착합체 형성에 의한 이소프렌 화합물의 분리

Abstract

In this work, olefin/paraffin separation was performed by using cuprous (Cu1+) ions as a selective separating agent for isoprene separation from C5 mixtures. The separating agent of cuprous (Cu1+) ion was prepared from the mixture of copper powder (Cu0) and cuprous nitrate trihydrate (Cu(NO3)2·3H2O, Cu2+) in the presence of pyridine and nitric acid as supporting agents. The mole ratio of isoprene separation was monitored by using GC and the separation with various ligand concentrations (such as pyridine and HNO3) was performed. The experimental results were shown that cuprous (Cu1+) ions were combined with diene like isoprene via the π-complexation by 2:1 molar ratio. Separation ability strongly depended on the ligand (pyridine and HNO3) concentration. When the separation was performed at Cu/ pyridine/HNO3=1/2.7/1, it showed maximum performance of separation (46.5% yield). These results imply that Cu ion (Cu1+) can be used as separating agent not only for alkene(one double bond) but also for diene(two double bonds).