Application of ASPEN PLUS in Nitrogen trifluoride-Carbon tetrofluoride Azeotropic Distillation;

In order to prolong the useful life of electrode and improve the efficiency of current,and to reduce the pollution of nickel on electrolyte and the cost of producing NF_3,the nickel anode was substituted by carbon anode in the course of producing nitrogen trifluoride(NF_3).

These(preliminary) studies indicate that the boron fluoride with nitromethane or acetone system with higher separation factor is superior to the anisole system used currently,but a more detailed study is.

The isotopes of boron,~(10)B and ~(11)B,were separated by means of a gas-liquid chemical exchange reaction and distillation involving the isotopic equilibrium between gaseous boron fluoride and a liquid boron fluoride-donor molecular addition complex.

The com plexes between these new donors and boron trifluoride (BF .

Although the ionic conductivities of methanol and pure boron trifluoride diethyl etherate (BFEE) are very low, methanol containing small amount of boron trifluoride diethyl etherate is good proton electrolyte with maximum ionic conductivity of 20 mS/cm.

Several separation routes of isotope boron 10 are described,but unique chemical exchange fractional distillation of boron trifluoride-anisole is adopted for the enrichment of boron 10 in large scale nowadays in the world.