Method for preparing 3,3,3-trichloro-1,1,1-trifluoropropane through gas-phase catalytic chlorination

The invention discloses a method for preparing 3,3,3-trichloro-1,1,1-trifluoropropane through gas-phase catalytic chlorination through gas-phase catalytic chlorination. The method comprises the following step: under the action of a catalyst, subjecting 3,3-dichloro-1,1,1-trifluoropropane and chlorine serving as raw materials to a gas-phase catalytic chlorination reaction in a catalyst bed layer, wherein the catalyst is a molecular sieve, and the molecular sieve is at least one selected from ZSM-5, 5A, MCM-41, a beta type molecular sieve and a Y type molecular sieve. The molecular sieve which is cheap and easy to obtain is used as the catalyst, the reaction is carried out under a gas phase condition, and the method has the advantages of high space time yield, simple process, safe operation, low production cost and the like. 本发明公开了一种气相催化氯化制备3,3,3-三氯-1,1,1-三氟丙烷的方法，所述方法包括：在催化剂作用下，以3,3-二氯-1,1,1-三氟丙烷与氯气为原料在催化剂床层进行气相催化氯化反应，所述催化剂为分子筛，选自ZSM-5、5A、MCM-41、β型分子筛或Y型分子筛中的至少一种。本发明采用廉价易得的分子筛作为催化剂，在气相条件下进行反应，具有时空收率高、过程简单、操作安全、