Method for producing and purifying 2,3,3,3-tetrafluoro-1-propene

A composition comprising 2,3,3,3-tetrafluoropropene, an organic extracting agent, chloromethane and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E);

• wherein said organic extracting agent is selected from the group consisting of methyl formate, 2-methoxy-1-propene, ethoxyethene, propanone, methyl acetate, isobutanal, isopropyl formate, ethyl acetate, butanone, n-propyl formate, 1,2-dimethoxyethane, isopropyl acetate, 1-methoxy-2-propanamine, 2-methoxyethanamine, 2-methylbutanal, tert-butyl acetate, ethyl propionate, dioxane, 3-pentanone, 2-pentanone, 2-methoxy-1-propanamine, trimethoxymethane, 1,3-dioxane, 3,3-dimethyl-2-butanone, 2-ethoxyethanamine, sec-butyl acetate, n-methyl-1,2-ethanediamine, 4-methyl-2-pentanone, 1,2-diaminoethane, butyronitrile, 1-methoxy-2-propanol, 1,2-propanediamine, 2,6-dimethyl-5-heptenal, 1-(dimethylamino)-2-propanol, diethyl carbonate, n-butyl acetate, 2-hexanone, n-ethylethylenediamine, 5-hexen-2-one, 2-methylpyridine, 2-methoxy-1-propanol, 1-ethoxy-2-propanol, hexanal, 2-(dimethylamino)ethanol, 2-methylpyrazine, 2-ethoxy-1-propanol, 1,3-propanediamine, valeronitrile, 2,6-dimethylpyridine, 4-methyl-2-hexanone, 1-methoxy-2-acetoxypropane, 4-methylpyridine, 2,6-dimethylmorpholine, methyl hexanoate, 2-propoxyethanol and 1-propoxy-2-propanol.

A composition comprising 2,3,3,3-tetrafluoropropene, an organic extracting agent, chloromethane and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E);

• said organic extracting agent having a separation factor S1,2 of greater than 1.6, said separation factor being calculated by the formula S1,2=(γ1,S*P1)/(γ2,S*P2) in which γ1,S represents the activity coefficient of 2,3,3,3-tetrafluoropropene in said organic extracting agent at infinite dilution, P1 represents the saturating vapor pressure of 2,3,3,3-tetrafluoropropene, γ2,S represents the activity coefficient of chloromethane in said organic extracting agent at infinite dilution, and P2 represents the saturating vapor pressure of chloromethane, wherein the composition comprises between 75% and 99.9% by weight of 2,3,3,3-tetrafluoro-1-propene, between 0.01% and 25% by weight of trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E) and less than 1% by weight of chloromethane relative to the total weight of the composition.