The effluent gases from the Nitric Acid concentration plants or from nitration plants contain NOx.

PLINKE developed a special high effective absorption system to recover HNO3 from NOx and to purify the effluent gas down to the values required by the authorities, which are normally max. 100 - 200 ppm.

NOx is transferred into HNO3, whereby no chemicals, but solely water and atmospheric air are used.

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