Preparation method of hexafluoro-1, 3-butadiene

The invention provides a preparation method of hexafluoro-1, 3-butadiene, and the preparation method comprises the following steps: introducing chlorotrifluoroethylene and 1, 1, 2-trifluoro-1, 2, 2-trichloroethane into a reactor filled with a catalyst, and carrying out a reaction to obtain 1, 2, 3, 4-tetrachlorohexafluorobutane; and carrying out a dechlorination reaction on the 1, 2, 3, 4-tetrachlorohexafluorobutane to obtain the hexafluoro-1, 3-butadiene. The preparation method has the advantages of cheap raw materials, simple process, mild conditions, low energy consumption, simple product separation, good selectivity and convenient purification, and can realize amplified continuous production. 本发明提供了一种六氟-1,3-丁二烯的制备方法，所述制备方法包括以下步骤：三氟氯乙烯与1,1,2-三氟-1,2,2-三氯乙烷通入装填有催化剂的反应器中，进行反应，得到1,2,3,4-四氯六氟丁烷；对所述1,2,3,4-四氯六氟丁烷进行脱氯反应，得到所述六氟-1,3-丁二烯。所述制备方法原料低廉，工艺简单，条件温和，能耗低，且产物分离简单，选择性好，便于提纯，可实现放大连续生产。