is equipped with a stripping column which permits the desired product to leave along with by product hcl traces of light organics principally 245cb and 244bb and sufficient anhydrous hydrogen fluoride ahf to form the azeotropes while retaining the bulk of the hf plus under fluorinated organics in preferred embodiments more than one fluorination reactors are connected in a series to increase throughput in a preferred embodiment the reaction is conducted in a train of agitated temperature controlled reactors connected in a series and containing liquid reactants one or more feeds comprising hydrogen fluoride and 1 1 1 2 3 pentachloropropane enters the first reactor where they contact each other in a liquid phase the resulting reaction produces a gas phase product comprising 1233xf as well as various other by products including hcl some under fluorinated intermediates and a small amount of over fluorinated by products the gas phase product leaves the liquid phase reactor and enters an integrated stripping column operating in reflux mode which permits the desired product to leave along with by product hcl over fluorinated by products and traces under fluorinated intermediates and sufficient anhydrous hydrogen fluoride ahf to at least form the azeotropes while retaining the bulk of the hf plus under fluorinated organics the products exiting the top of the stripping column are fed into recycle column 2 the stream of under fluorinated reaction products and unreacted 240db and hf is taken from the bottom of the first fluorination reactor and fed together with required amount of fresh hf to the second fluorination reactor that is operated similar to first fluorination reactor in some embodiments.