PROCESS FOR PREPARING DIPHENYLSULFONE COMPOUND BY USING MIXED SOLVENT OF WATER AND TOLUENE AND BY PULVERIZATION

摘要

PURPOSE: A process for preparing a diphenylsulfone compound is provided to easily separate out by-products and unreacted biphenylsulfone compound from a salt of object compound by using an mixed solvent of water and tolunene and by pulverization. CONSTITUTION: The diphenylsulfone compound of the formula 1 is prepared by the process comprising reacting 4,4'-dihydroxydiphenylsulfone compound of the formula 2 with an isopropyl halide of the formula 3: R-X in the presence of a reaction solvent and a base, wherein the process comprises depositing a salt of object compound of the formula 4 in a form of solid by using a mixed solvent of water and toluene as the reaction solvent, followed by filtrating to separate out unreacted 4,4-dihydroxydiphenylsulfone compound and a by-product, diether compound of the formula 5 simultaneously, provided that water is employed in an amount of 0.25-3 parts by weight, with respect to 1 parts by weight of 4,4-dihydroxydiphenylsulfone and the filtrated salt of object compound is treated with an acid upon pulverizing. In the formulas 1-5, R represents isopropyl, X represents a halogen atom, and M represents an alkali metal or an alkali earth metal.