Advances in mechanism and processes of telomerization of perfluoroalky iodides

The mechanism of the telomerization of perfluoroalky iodides is illuminated.The processes of perfluoroalky iodides by gas phase,catalyst and radical telomerization are discussed.It is pointed out that two keys to perfluoroalky iodides produced by the telomerization processes are as follows:①improving productivity of the unit,and reducing the cost;②increasing the selectivity,and decreasing the telomer of by-products containing above 10 carbon numbers,or other by-products.It is suggested that the telomerization equipment should be made up of several tube bank reaction units and dephlegmators,and the telomerization be done step by step.