Method for preparing 1, 1, 1, 2, 3, 3, 3-heptafluoropropane or/and hexafluoropropylene through gas phase reaction

The invention provides a method for preparing 1, 1, 1, 2, 3, 3, 3-heptafluoropropane or/and hexafluoropropylene through gas phase reaction, which comprises the following steps: taking heptafluoroisobutyronitrile and water as raw materials, and carrying out gas phase reaction in the presence of a catalyst to obtain a crude product containing the 1, 1, 1, 2, 3, 3, 3-heptafluoropropane and/or hexafluoropropylene. The invention creates a novel method for preparing 1, 1, 1, 2, 3, 3, 3-heptafluoropropane or/and hexafluoropropylene, the method has the advantages of high raw material conversion rate, easy reaction control, easy realization of a continuous process, and selective preparation of 1, 1, 1, 2, 3, 3, 3-heptafluoropropane or/and hexafluoropropylene according to actual needs. 本申请提供了一种气相反应制备1,1,1,2,3,3,3-七氟丙烷或/和六氟丙烯的方法，包括如下步骤：以七氟异丁腈和水为原料，在催化剂下，发生气相反应，得到含有1,1,1,2,3,3,3-七氟丙烷和/或六氟丙烯的粗产品。本申请开创了一种新的制备1,1,1,2,3,3,3-七氟丙烷或/和六氟丙烯的方法，该方法原料转化率高，而且反应容易控制、容易实现连续化工艺，可以根据实际需要，选择制备1,1,1,2,3,3,3-七氟丙烷或/和六氟丙烯。