System and method for preparing 2, 3, 3, 3-tetrafluoropropene

The invention relates to a method for preparing 2, 3, 3, 3-tetrafluoropropene. The method comprises the following steps: respectively pumping 1, 1, 2, 3-tetrachloroethylene and hydrogen fluoride fromthe inlets of a first heater and a second heater, heating, introducing into a tubular reactor filled with a fluorination catalyst, contacting at 300-400 DEG C for 10-30 seconds, cooling the obtained product, and introducing into a separation tank to separate; and pumping into the second heater again, heating, introducing into the tubular reactor filled with the elimination catalyst, contacting at350-500 DEG C for 3-10 seconds, washing with water, washing with alkali, drying and rectifying to obtain the target product 2, 3, 3, 3-tetrafluoropropene. Therefore, the method for preparing 2, 3, 3,3-tetrafluoropropene has the characteristics of small on-line reaction amount, low reaction temperature, safety, controllability, continuous production and low production cost. 一种制备2，3，3，3-四氟丙烯的方法，所述制备方法是将1，1，2，3-四氯乙烯、氟化氢分别从第一加