SELECTIVELY REACTING OLEFINS CONTAINING TERMINAL CF GROUP IN MIXTURE Russian patent published in 2010 - IPC C07C17/395 C07C21/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of reducing molar ratio (1) of a first component selected from a group consisting of compounds of formula Y¹Y²C=CF₂, where each of Y¹ and Y² independently denotes H, F, Cl, Br, C₁-C₆alkyl or C₁-C₆ halogenalkyl containing not more than 3 chlorine atoms, 2 bromine atoms and 1 iodine atom, and (2) a second component selected from a group consisting of saturated compounds of formula C_dH_eF_fCl_gBr_hI_k, where d is an integer ranging from 1 to 10, e+f+g+h+k equals 2d+2, provided that g equals 0, 1, 2 or 3, h equals 0, 1 or 2 and k equals 0 or 1, and unsaturated compounds of formula Y³Y⁴C=CY⁵Y⁶, where each of Y³, Y⁵ and Y⁶ independently denotes H, F, Cl, Br, C₁-C₆ alkyl or C₁-C₆ halogen alkyl containing not more than 3 chlorine atoms, 2 bromine atoms and 1 iodine atom, provided that Y⁵ and Y⁶ do not denote F at the same time and Y⁴ denotes C₁-C₆ alkyl or C₁-C₆ halogenalkyl containing not more than 3 chlorine atoms, 2 bromine atoms and 1 iodine atom in a mixture. Said method involves bringing said mixture into contact with at least one selective removal agent selected from a group consisting of SO₃ and RSO₃H, where R is selected from a group consisting of F, Cl, OH, C₁-C₈ alkyl, C₁-C₈ fluoroalkyl or C₁-C₈ fluoroalkoxyalkyl containing not more than two ester oxygen atoms, with subsequent selective reaction of said selective removal agent with said first component. The invention also relates to a method of extracting at least one product selected from a group consisting of saturated saturated compounds of formula C_dH_eF_fCl_gBr_hI_k, where d is an integer ranging from 1 to 10, e+f+g+h+k equals 2d+2, provided that g equals 0, 1, 2 or 3, h equals 0, 1 or 2 and k equals 0 or 1, and unsaturated compounds of formula Y³Y⁴C=CY⁵Y⁶, where each of Y³, Y⁵ and Y⁶ independently denotes H, F, Cl, Br, C₁-C₆ alkyl or C₁-C₆ halogen alkyl containing not more than 3 chlorine atoms, 2 bromine atoms and 1 iodine atom, provided that Y⁵ and Y⁶ do not denote F at the same time and Y⁴ denotes C₁-C₆ alkyl or C₁-C₆ halogenalkyl containing not more than 3 chlorine atoms, 2 bromine atoms and 1 iodine atom in a mixture which contains (i) said at least one product and (ii) an olefin impurity selected from a group consisting of compounds of formula Y¹Y²C=CF₂, where each of Y¹ and Y² independently denotes H, F, Cl, Br, C₁-C₆ alkyl or C₁-C₆ halogen alkyl containing not more than 3 chlorine atoms, 2 bromine atoms and 1 iodine atom. The method involves (a) bringing said mixture into contact with at least one selective removal agent selected from a group consisting of SO₃ and RSO₃H, where R is selected from a group consisting of F, Cl, OH, C₁-C₈ alkyl, C₁-C₈ fluoroalkyl and C₁-C₈ fluoroalkoxyalkyl containing not more than two ether oxygen atoms, with subsequent selective reaction of said selective removal agent with olefin impurity, resulting in reduction of the radio of the olefin impurity to the said at least one product; and (b) separation of said at least one product and olefin impurity formed during the reaction using the selective removal agent obtained at step (a).

EFFECT: separation of desired products from impurities.

10 cl, 20 ex