Method for preparing hexafluoroisopropyl methyl ether

The invention discloses a method for preparing hexafluoroisopropyl methyl ether. The method comprises that in the presence of a catalyst, hexafluoroisopropanol and dimethyl sulfate undergo a reaction to produce hexafluoroisopropyl methyl ether and the catalyst comprises a main catalyst and a cocatalyst according to a mole ratio of 300: 1 to 30: 1. The method has the advantages of appropriate reaction temperature, simple processes, low cost, high reaction yield, high selectivity, high product purity and environmental friendliness. 本发明公开了一种制备六氟异丙基甲醚的方法，在催化剂作用下，六氟异丙醇与硫酸二甲酯反应制备六氟异丙基甲醚，所述催化剂包括主催化剂和助催化剂且两者之间的摩尔配比为300:1～30:1。本发明提供的方法具有反应温度合适、工艺流程简单、成本低、反应收率和选择性高、产品纯度高和对环境友好等优点。