| 摘要 |
PURPOSE:To recover and maintain the catalytic activity in the preparation of the titled compound by condensing acetone, to reduce the amount of by-products, and to improve the yield of the titled compound, by carrying out the reaction in the presence of a specific amount of water using an anion exchange resin as a catalyst. CONSTITUTION:Diacetone alcohol is prepared by reacting acetone at -5-+50 deg.C, preferably 0-20 deg.C, in the presence of 3-10% water using an anion exchange resin as a catalyst. A strongly basic ion exchange resinI, II, a weakly basic ion exchange resin, etc. can be used as the anion exchange resin. The anion exchange resin is obtained e.g. by introducing various anion exchange groups to a polymer obtained by the copolymerization of styrene and divinylbenzene. |
