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Application
High purity oxygen is used
◇for the formation of silicon dioxide and metal oxide, as an etchant for photoresist, and in mixtures with halocarbons for etching silicon
◇in conjunction with high purity methane in Advanced Gas Cooled (AGR) nuclear reactors to maintain an appropriate arbon balance in the (CO2) gas coolant in the nuclear core
◇in the optical fibre production process
◇used in the transportation of live fish and seafoods
◇for enrichment of air during fermentation
……
Process
Oxygen is obtained on a commercial scale by the liquefaction and subsequent distillation of air. For very high purity oxygen it is normally necessary to take the product from an air separation plant through a secondary purification and distillation stage. Alternatively high purity oxygen may be produced by the electrolysis of water. Lower purities of oxygen an also be produced with membrane technique.
Emergency Measures
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