METHOD OF REFINING 1,1,1,2-TETRAFLUOROETHANE FROM UNSATURATED HALOGEN-CONTAINING IMPURITY Russian patent published in 1997 - IPC

FIELD: chemical technology. SUBSTANCE: method involves passing the crude 1,1,1,2-tetrafluoroethane through the layer of dehydrated solid oxidizer that is copper or nickel chromites of the formula Me₂Cr₂O₅ where: Me - copper or nickel at heating. After oxidation of unsaturated compounds their content in 1,1,1,2-tetrafluoroethane is decreased to less 10 ppm Process is carried out to breakthrough olefin concentration appearance at outlet and then oxidizing agent is regenerated with the dried oxygen-containing gaseous mixtures at heating. EFFECT: improved method of refining, enhanced quality of product. 3 cl, 1 tbl