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AssigneeNippon Shokubai Co., Ltd.
InventorsHitoshi Mitsui, Toshiya Iida, Ikuyo Ikeno, Naoko Hirano, Yukiko Ariyoshi
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A solution containing an organic solvent and a compound including impurities, represented by, for example, general formula (1) (wherein R1 to R10 independently represent H, F, a hydrocarbon group or an alkoxy group, at least one of R1 to R5 is F, at least one of R6 to R10 is F, M is H, alkali metal, alkaline earth metal or alkaline earth metal halide, n is 3 or 4, and m is 2 when M is an alkaline earth metal, or m is 1 when M is the other) is mixed with water. The purified compound is reacted with a compound which forms a monovalent cation seed to prepare a derivative. Thus, a purifying method capable of efficiently and easily separating and removing colored components contained in tetrakis(fluoroaryl)borate compounds can be provided. Moreover, it is possible to provide a method capable of preparing a highly-pure tetrakis(fluoroaryl)borate derivative efficiently and at low costs.
A method for purifying a tetrakis(fluoroaryl)borate compound or a tris(fluoroaryl)borate compound, characterized by mixing a solution containing an organic solvent and the tetrakis(fluoroaryl)borate compound or the tris(fluoroaryl)borate compound including impurities, with water, and wherein, after mixing the solution with water, an aqueous solution obtained by removing the organic solvent from the mixture by distillation is further mixed with an aromatic hydrocarbon.
A method for preparing a tetrakis(fluoroaryl)borate derivative, characterized by reacting a compound generating a monovalent cation seed with a tetrakis(fluoroaryl)borate compound or a tris(fluoroaryl)borate compound, wherein the tetrakis(fluoroaryl)borate compound or the tris(fluoroaryl)borate compound has been purified prior to reaction with the comoound generating a monovalent cation seed by mixing a solution containing an organic solvent and the tetrakis(fluoroaryl)borate compound or the tris(fluoroaryl)borate compound including impurities with water followed by removing the organic solvent from the mixture by distillation.
A method for preparing a tetrakis(fluoroaryl)borate derivative, characterized by purifying a tetrakis(fluoroaiyl)borate compound or a tris(fluoroaryl)borate compound by rnmxing a solution containing an organic solvent and the tetralis(fluoroaryl)borate compound or the tris(fluoroaryl)borate compound including impurities with water then removing the organic solvent from the mixture by distillation, followed by reacting a compound generating a monovalent cation seed with the purified tetraikis(fluoroaryl)borate compound or the tris(fluoroaryl)borate compound.
Dependencies are inferred from the claim text.