以1，5-戊二醇为原料催化脱氢得到δ-戊内酯粗品，再采用减压间歇精馏工艺进行提纯，得到δ-戊内酯纯度为99.8%、收率为95.0%，产品质量达到了聚合级技术指标。减压间歇精馏工艺的操作条件为：压力5.0 kPa、塔顶温度140℃、回流比2.5~3.0。该新工艺能耗低、操作简便，工业化推广意义较大。

Crude δ-valerolactone solution is obtained from catalytic dehydrogenation of 1,5-pentanediol,and purified by an intermittent vacuum distillation process to produce pure δ-valerolactone with a purity of 99.8% at a yield of 95.0%.The quality of pure δ-valerolactone reaches the technical index of polymerization grade product.The operating conditions for intermittent vacuum distillation process are as follows:system pressure is 5.0 kPa,tower top temperature is at 140℃,and the reflux ratio is in the range of 2.5-3.0.This process has the advantages of low energy consumption and simple operation,and is of great significance for industrialization.