| 摘要 |
<p>A method for purifying phloroglucin wherein crude phloroglucin obtained by an acid-decomposition of 1,3,5-triisopropylbenzene trihydroperoxide in the presence of a solvent and removal of the formed acetone and the solvent by evaporation, is extraction-treated within a pH range of 7.5 to 12 in the coexistence of an aqueous alkali liquor of 4 to 25 times by weight based on the crude phloroglucin and an organic solvent of 0.05 to 6 times by weight based on said aqueous alkali liquor selected from ketones and esters which are separable from the aqueous alkali liquor, and after acidifying the separated aqueous alkali extract, the deposited crystal is recrystalized. The phloroglucin is useful as a starting material of medicines and photosensitizers.</p> |
