| 摘要 |
PURPOSE:To obtain the titled compound in high quality, by reacting glycerol with a medium-chain fatty acid methyl ester in the presence of an alkali metal hydroxide under specific condition, adding zinc oxide and a specific amount of the above ester to the system and further reacting at a specific temperature. CONSTITUTION:The titled compound useful as a lubricant, solvent, etc., is produced by the ester-interchange reaction of (A) a 6-10C medium-chain fatty acid methyl ester with (B) glycerol. The above reaction is carried out in two steps comprising (1) the 1st step reaction to react the component A with the component B at a molar ratio (A/B) of 2.0-3.0 at 160-180 deg.C using an alkali metal hydroxide as a catalyst and (2) the 2nd step reaction to add zinc oxide to the system as a catalyst, add the component A and react at 200-220 deg.C. The sum of the component A used in the 1st step and that added in the 2nd step is 3.0-4.0mol per 1mol of the component B used in the 1st step. A reaction product having excellent color tone and containing the objective compound in high purity can be produced by this process. Accordingly, the load of post- treatment of the product can be reduced. |
