正戊醛与2－甲基丁醛的精密分馏

Fine fractional distillation of n-valeraldehyde and 2-methylbutyraldehyde

在９．３３ｋＰａ、釜温＜１００℃条件下，用２６块理论塔板数的分馏柱，用减压分馏法将正戊醛与２－甲基丁醛分离，正戊醛收率８０％，纯度≥９８％；２－甲基丁醛收率６８％，纯度≥９８％。还探讨了阻聚剂对戊醛异构体分馏结果的影响。

Under conditions of 9. 33 kpa, < 100'℃and the fractional distillation column with 26 therotical paate numbers, the vacuum distillation method is used to separate n-valeraldehyde from 2-methylbuturladehyde, The yieldof n-valeraldehyde is 80% with a purity of ≥98%;the yield of 2-methylbutyaldehyde is 68% with a purity of ≥98% The effect of ploymerization inhibitor on the fractional distillation result of valeraldehyde isomers is discyssed in the paper,