| abstract |
A method for efficiently separating HFO-1234yf and HFP from a mixture containing 2,3,3,3-tetrafluoropropene (HFO-1234yf) and hexafluoropropene (HFP) is provided. An azeotrope-like composition comprising 8.7-76.9 mol% of HFO-1234yf and 23.1-91.3 mol% of HFP, and HFO-1234yf and HFP in a total amount thereof The initial mixture containing the HFO-1234yf content in excess of 25.9 mol% is distilled, and the first content of HFO-1234yf in the total amount of HFO-1234yf and HFP is lower than that in the initial mixture. HFO-1234yf having a content of HFO-1234yf in the total amount of the fraction and HFO-1234yf and HFP is separated into a second fraction higher than that in the initial mixture, and HFO-1234yf having a reduced HFP concentration is obtained from the second fraction. The manufacturing method of HFO-1234yf including the process of obtaining. [Selection figure] None |