| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a powder-type bisphenol-A bis(diphenylphosphate) (BDP) by which the powdery BDP can be produced by controlling the n-value in a BDP mixture composition so that the composition of n=1 may be≥84%, and controlling the temperature for carrying out recrystallization. SOLUTION: The method for producing the powder-type BDP includes a step S100 for feeding a liquid BDP raw material, a step S101 for controlling the n-value of the BDP raw material, a step S102 for feeding a solvent and mixing the BDP raw material with the solvent to dissolve the BDP raw material, and a step S103 for recrystallizing the mixture at a controlled temperature, filtering the solid, and drying the filter cake. COPYRIGHT: (C)2008,JPO&INPIT
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