| 摘要 |
PURPOSE:To obtain high-purity caprolactam, etc., by forming ozonized oxygen by an ozonizer using O2 as a raw material, diluting O2 in the ozonized oxygen with an intert gas to a concentration safe in use to give an O3 gas, purifying caprolactam, etc. by the use of the O3 gas. CONSTITUTION:Ozonized oxygen (O2+O3) is formed by an ozonizer using O2 as a raw material, this ozonized oxygen is blended with air or N2 or another inert gas, so that O2 concentration in the ozonized gas is diluted to a desired value. The ozone gas after dilution is used as a purifying gas, bubbled through caprolactam, etc. impurities contained in caprolactam are oxidized, converted into precipitate, etc., and removed, to give high-purity caprolactam useful as raw material for nylon, etc. EFFECT:Since a discharge area in the ozonizer required is 1/2 the area of use of air as a raw material and a dehumidifying column is not required, installation cost can be extremely reduced, and economically operation cost such as power consumption, etc. after that can be reduced.
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