以甲醇为原料，氧化铝为催化剂，对甲醇气相催化脱水制气雾剂级高纯二甲醚的工艺条件进行了试验研究。结果表明，当反应温度为２８０～３３０℃，反应压力为０．８ＭＰａ时，甲醇转化率为６０％～７０％，二甲醚选择性达９９％，二甲醚质量分数为９９．９％。采用该工艺的一套２０００ｔ／ａ装置已成功运行，生产出合格的产品。 Using methanol as raw material and alumina as catalyst, the experimental conditions of aerosol-grade high-purity dimethyl ether by gas-phase catalytic dehydration of methanol were studied. The results showed that when the reaction temperature was 280 ~ 330 ℃ and the reaction pressure was 0.8 MPa, the conversion of methanol was 60% ~ 70%, the selectivity of dimethyl ether was 99% and the mass fraction of dimethyl ether was 99.9%. A 2000t / a unit using this process has been successfully run to produce qualified products.