摘要
考察了AlF3催化剂用于1,1,2,3-四氯丙烯气相氟化制备2-氯-3,3,3-三氟丙烯的催化性能,研究了催化剂的失活原因。结果表明,催化剂反应过程失活明显,随着催化剂活性下降,1,1,2,3-四氯丙烯的氟代产物的含氟成分越来越少,由反应开始时的主产物三氟一氯丙烯、逐步停留到二氟二氯丙烯。催化剂表面积炭,催化剂表面酸性下降,是导致催化剂失活的原因。
In the paper,the catalytic property of AlF3 catalyst was investigated in the preparation of 2-chloro-3,3,3-trifluoropropene using 1,1,2,3-Tetrachloropropene via gas phase fluorination and researched the reasons for catalyst inactivation.The results showed that the catalyst deactivation obviously during reaction process,the fluorine composition of 1,1,2,3-tetrachloropropene fluorination process decreased along with the catalyst activity decline,from trifluorochloropropen as principal product at first gradually stayed as difluorodichloropropen.Carbon deposit on surface of the catalyst and acid down in catalyst surface caused the deactivation of catalyst.
出处
《化工生产与技术》
CAS
2011年第6期1-3,7,共3页
Chemical Production and Technology
