主权项 |
1. A method for the production of (E) 1-chloro-3,3,3-trifluoropropene without the use of a catalyst comprising the steps of;
(a) operating one or more agitated reaction vessels, each vessel in succession converting a portion of the original reactants fed to the first of the reaction vessels, with all of the reaction vessels being run simultaneously and operating in a continuous fashion; (b) conducting, in each of the reaction vessels, a series of fluorination reactions of a starting material selected from the group consisting of 1,1,1,3,3-pentachloropropane, 1,1,1,3,3-pentachloropropane, 1,1,3,3-tetrachloropropene, and 1,3,3,3-tetrachloropropene, and any mixtures thereof, using HF with simultaneous removal of by-product HCl and the product (E) 1-chloro-3,3,3-trifluoropropene; (c) recycling at least a portion of any unreacted starting material and HF together with any under-fluorinated by-products back to step (b); (d) separating and purifying by-product HCl; (e) separating excess HF back to step (b); (f) purifying the desired product, (E) 1-chloro-3,3,3-trifluoropropene; and (g) isomerization any by-product (Z) 1-chloro-3,3,3-trifluoropropene to (E) 1-chloro-3,3,3-trifluoropropene to maximize the process yield. |