METHOD OF HYDRODECHLORINATION FOR OBTAINING HYDROFLUORINATED OLEFINS Russian patent published in 2013 - IPC C07C17/25 C07C21/18 B01J23/72 B01J23/44 

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining fluorine-containing olefins. Described is method of obtaining fluorine-containing olefins, including contact of chlorofluoroalkene of formula R_tCCl=CClR_f, where each R_f is perfluoroalkyl group, independently selected from group, consisting of CF₃, C₂F₅, n-C₃P₇, i-C₃F₇, n-C₄F₉, i-C₄F₉ and t-C₄F₉, and where F can be one of R_f groups, with hydrogen in presence of catalyst at temperature from approximately 200°C to approximately 450°C, in order to induce substitution of chlorine substituents of chlorofluoroalkene with oxygen to obtain fluorine-containing olefin, which has formula E- or Z-R¹CH=CHR², where each R¹ and R² are perfluoroalkyl groups, independently selected from group, consisting of CF₃, C₂F₅, n-C₃F₇, i-C₃F₇, n-C₄F₉, i-C₄F₉ and t-C₄F₉, and where R² can be F.

EFFECT: increased efficiency of method of obtaining fluorine-containing olefins.

11 cl, 14 tbl, 16 ex