Method for removing tetranitromethane from nitric acid

Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material

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159DIG19, 203 49, 203 98, 4233942, B01D 334

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055890377

ABSTRACT:
Tetranitromethane and other polynitrated methanes can be effectively removed from otherwise substantially organic-free nitric acid streams through the addition of substantially organic-free concentrated sulfuric acid and by, optionally, performing secondary operations such as sparging the mixed acid stream with a gas such as nitric oxide or with an oil.

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