| 摘要 |
The invention relates to a process for purifying a crude 1,1,1,5,5,5-hexafluoroacetylacetone. This process includes (a) hydrating the crude 1,1,1,5,5,5-hexafluoroacetylacetone to a 1,1,1,5,5,5-hexafluoroacetylacetone hydrate; and (b) dehydrating the 1,1,1,5,5,5-hexafluoroacetylacetone hydrate, thereby obtaining a purified 1,1,1,5,5,5-hexafluoroacetylacetone. Prior to the step (b), the 1,1,1,5,5,5-hexafluoroacetylacetone hydrate may be brought into contact with a poor solvent in which 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate is substantially insoluble. Furthermore, the step (a) may be conducted in a poor solvent in which 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate is substantially insoluble. It is possible by the process to easily obtain 1,1,1,5,5,5-hexafluoroacetylacetone with high purity.
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