AZEOTROPIC MIXTURES CONTAINING 1,2,3,3,3-PENTAFLUOROPROPENE AND HYDROGEN FLUORIDE AND USE THEREOF Russian patent published in 2012 - IPC C07C17/25 C07C17/383 C07C21/18 

FIELD: chemistry.

SUBSTANCE: present invention relates to an azeotropic or close-to-azeotropic mixture for producing Z-1,2,3,3,3-pentafluoropropene containing 61.0-78.4 mol % Z-HFC-1225ye and hydrogen fluoride. Described also is a method of separating an azeotropic or close-to-azeotropic mixture from HFC-236ea, a method of separating Z-HFC-1225ye from a mixture of Z-HFC-1225ye and hydrogen fluoride which is azeotropic or close to azeotropic, a method of separating -HFC-1225ye from a mixture of Z-HFC-1225ye, HFC-236ea and hydrogen fluoride with dehydrofluorination, as well as a method of producing Z-HFC-1225ye.

EFFECT: obtaining an azeotropic mixture characterised by that the difference between dew-point pressure and pressure at which bubbles appear is less than or equal to 3% of the pressure at which bubbles appear.

20 cl, 11 ex, 11 tbl, 2 dwg