| CPC C07F 9/52 (2013.01) [C07C 17/354 (2013.01)] | 9 Claims |
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1. A method for purifying a phosphorus-containing olefin compound salt, comprising reprecipitating and/or recrystallizing a solid comprising at least one phosphorus-containing olefin compound salt selected from the group consisting of:
a phosphorus-containing olefin compound salt A represented by the following formula (1):
 wherein X1 and X2 are each independently F, Cl, Br, I, or H; each W+ is the same or different and is a monovalent cation comprising PR3 or P(OR)3, provided that each R is independently a group having a saturated or unsaturated structure containing C and H, each R is optionally bonded together to form a ring, and each R optionally contains an atom other than C and H; and M− is a monovalent anion comprising an atom or a compound; and
a phosphorus-containing olefin compound salt B represented by the following formula (2):
 wherein X1, X2, W+, and M− are as defined above, and Y is F, Cl, Br, I, H, an alkyl group, an alkyl ether group, a fluoroalkyl group, or a fluoroalkyl ether group;
in a solvent, thereby obtaining a purified product of the phosphorus-containing olefin compound salt in a solution,
wherein after the solid is dissolved in the solvent at 45 to 60° C., the temperature of the solution is reduced at −0.25° C./min or less to thereby perform the reprecipitation and/or recrystallization.
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