Patent ID: 9126885
Filing Date: 2015-09-08
Classification: C07C

Abstract:
1. A method for purifying 2,3,3,3-tetrafluoropropene, the method comprising bringing a mixture, which comprises 2,3,3,3-tetrafluoropropene as the main component and also comprises hydrohaloalkene impurities and hydrohaloalkane impurities, into contact with a solvent that has an extraction/removal index (r), as represented by formula (1), of at most 6.5, so as to remove at least a part of the hydrohaloalkene impurities and at least a part of the hydrohaloalkane impurities: wherein δD, δP and δH are Hansen solubility parameters of the solvent, which are, respectively, dispersion parameter, polar parameter and hydrogen bonding parameter of the solvent, the unit of each of which is (MPa)