Synthesis route and green chemistry optimization of 1,2-diiodotetrafluoroethane

The synthesis of 1,2-diiodotetrafluoroethane is the premise of its industrial application and wide use, and the optimization of synthesis path under the concept of green chemistry is an important direction to promote its sustainable development. At present, while exploring synthesis methods, researchers are committed to reducing energy consumption and pollution through green chemistry, and improving the economy and environmental protection of the synthesis process. 

The common synthesis route of 1,2-diiodotetrafluoroethane is mainly based on tetrafluoroethylene as the starting material, which is prepared by the addition reaction with iodine. However, the traditional synthesis methods have many problems, such as harsh reaction conditions, low atomic utilization rate, and Large amount of waste. In order to achieve green chemistry optimization, scientists have carried out research from many aspects. In the selection of catalysts, the development of efficient and reusable catalysts has become the key. For example, the use of supported metal catalysts instead of traditional homogeneous catalysts can not only improve the selectivity and efficiency of the reaction, but also facilitate the separation and recovery of catalysts and reduce the pollution of catalysts to the environment. 

In the improvement of reaction solvents, green solvents such as ionic liquids and supercritical carbon dioxide gradually replace traditional organic solvents. Ionic liquids have good solubility and designability, can promote the reaction under mild conditions, and are easy to recover; Supercritical carbon dioxide has the advantages of non-toxic, tasteless and non combustible. After the reaction, it can be volatilized by reducing the pressure to separate it from the product and reduce the solvent residue and pollution. In addition, by optimizing the reaction conditions, such as reducing the reaction temperature and pressure, shortening the reaction time, and adopting the continuous reaction process, the atomic utilization rate can be further improved, the energy consumption can be reduced, and the generation of by-products can be reduced, so that the synthesis of 1,2-diiodotetrafluoroethane can meet the requirements of green chemistry. With the continuous promotion of green chemical optimization, the synthesis of 1,2-diiodotetrafluoroethane will be more efficient, environmentally friendly and sustainable.