The present invention provides a method for efficiently preparing 2,3,3,3-tetrafluoropropene (HFO-1234yf) by a simple and economically advantageous method that is suitable for implementation on an industrial scale. The present invention provides a process for preparing 2,3,3,3-tetrafluoropropene, comprising the step of: (1) in a reactor, (1-1) reacting 1,1,1,2,3-pentachloropropane with hydrogen fluoride in an amount of 10 to 100 mol per mole of the 1,1,1,2,3-pentachloropropane 1; (1-2) in the presence of chromic oxide represented by composition formula: CrOm (1.5
本发明提供了一种通过简单且经济优势的方法高效制备2,3,3,3-四氟丙烯(HFO-1234yf)的方法,适合在工业规模上实施。本发明提供了一种制备2,3,3,3-四氟丙烯的方法,包括以下步骤:(1)在反应器中,(1-1)将1,1,1,2,3-五氯丙烷与氢氟酸反应,氢氟酸的用量为每摩尔1,1,1,2,3-五氯丙烷1的10至100摩尔;(1-2)在存在由化学式CrOm(1.5
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