| 摘要 |
<p>Tetrafluoroethylene is produced by pyrolysing an inorganic or organic fluorine compound at over 1700 DEG C. and passing the gaseous product into contact with excess of fluidized carbon kept at below 500 DEG C., to quench rapidly, and separating the tetrafluoroethylene. Carbon may be present during the pyrolysis. Designs of plant in which a rotating carbon arc or an electrically heated graphite tube are used for the pyrolysis, also the fluidized carbon chamber, are shown in drawings. In examples the results obtained from pyrolysed phosphorus pentafluoride, carbon tetrafluoride, sulphur hexafluoride and arsenic trifluoride, all with rotating carbon arc, or sulphur hexafluoride using graphite furnace, are compared with the method with no rapid quenching and with fluidized sand quench. Specification 808,442 is referred to.</p> |
