| 摘要 |
To provide a method for purifying R-1234yf, whereby it is possible to efficiently remove even impurities such as R-1243zf, etc. which are difficult to separate by distillation purification, from a mixture containing R-1234yf as the main component and various impurities, such as a gas formed by reacting R-1214ya with hydrogen. The method for purifying R-1234yf comprises a step of bringing a mixture which contains R-1234yf as the main component and also contains hydrohaloalkene impurities other than R-1234yf and hydrohaloalkane impurities, into contact with a solvent that has an extraction/removal index (r), as represented by the formula r = [4 × (´D - 17.2) 2 + (´P-8.3) 2 + (´H - 2.6) 2 ] 1/2 , of at most 6.5, so as to remove at least a part of the hydrohaloalkene impurities and hydrohaloalkane impurities. |
