Process for purifying difluoromethane

C - Chemistry – Metallurgy – 07 – C

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C07C 19/08 (2006.01) C07C 17/389 (2006.01)

Patent

CA 2157747

PRECIS DE LA DIVULGATION: Pour éliminer les traces de chlorofluorométhane présentes dans un difluorométhane, on fait passer le difluorométhane à purifier sur un tamis moléculaire 13X à une température au moins égale à 60°C. Le tamis peut être régénéré par lavage à l' aide d' une solution de carbonate de sodium ou de potassium et chauffage à température élevée sous atmosphère inerte ou sous vide.

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