首页>
外国专利>
Method for mitigating HFC-245cb formation during HCFO-1233xf hydrofluorination to HCFC-244bb
Method for mitigating HFC-245cb formation during HCFO-1233xf hydrofluorination to HCFC-244bb
展开▼
机译:减轻HCFO-1233xf加氢氟化为HCFC-244bb时HFC-245cb形成的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
The present process relates to a method for minimizing the formation of 1,1,1,2,2-pentafluoropropane in a liquid phase reaction of 2-chloro-3,3,3-trifluoropropene and HF in the presence of a hydrofluorination catalyst comprising:(a) reacting HF with sufficient amount of 2-chloro-3,3,3-trifluoropropene in the presence of a hydrofluorination catalyst under conditions effective to form 2-chloro-1,1,1,2-tetrafluoropropane, the hydrofluorination catalyst being present in sufficient amounts to catalyze said reaction and the 2-chloro-1,1,1,2-tetrafluoropropane being formed with both a conversion of greater than 80% and a 1,1,1,2,2-pentafluoropropane selectivity lower than 20%; and(b) maintaining the 2-chloro-1,1,1,2-tetrafluoropropane being formed with both a conversion of about 80% or more and a 1,1,1,2,2-pentafluoropropane selectivity of about 20% or less by adding said hydrofluorination catalyst to the reactor in small increments.展开▼