Noble Gases Chemische Eigenschaften,Einsatz,Produktion Methoden
l?uterung methode
Of these gases,
argon is an unexcelled protective gas for
highly sensitive substances. Helium and
neon are equally effective and are also used
occasionally. These gases are stored in
steel cylinders and can be freed of the usual
impurities (H2O, O2, CO2) by the methods customarily used for
other gases (e.g., Na). A simple and very effective method for the
removal of moisture and O2 from inert gases and from N2 or H2 is
given by Harrison . In this method the gas is passed through a
U tube (e.g., 40 cm. high, 2.5 cm. in diameter) partly filled with
liquid Na-K (25% Na, 75% K). In addition, the problem of the removal of small amounts of N2
from the inert gases, particularly from Ar, requires special consideration here. The N2 may be combined with metallic Ca, Mg,
Ti or Zr; metallic U is also very useful.
Noble Gases Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte