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    • 36. 发明授权
    • Process for separating hydrogen fluoride from organic feedstocks
    • 从有机原料中分离氟化氢的方法
    • US08519201B2
    • 2013-08-27
    • US13423726
    • 2012-03-19
    • Daniel C. MerkelKonstantin A. PokrovskiHsueh S. Tung
    • Daniel C. MerkelKonstantin A. PokrovskiHsueh S. Tung
    • C07C17/38C07C17/00
    • C07C17/383C07C17/087C07C17/25C07C19/10C07C21/18
    • Provided is a process for purifying an organic feedstock comprising (a) distilling a raw organic feedstock comprising hydrogen fluoride, 2-chloro-1,1,1,2-tetrafluoropropane, and 2-chloro-3,3,3-trifluoropropene to produce a first distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a first bottoms stream rich in hydrogen fluoride; (b) cooling said first distillate stream to produce an intermediate composition comprising an organic layer rich in 2-chloro-1,1,1,2-tetrafluoropropane and 2-chloro-3,3,3-trifluoropropene, and an acid layer rich in hydrogen fluoride; and, optionally but preferably, (c) distilling said organic layer to produce a second distillate stream comprising an azeotrope-like composition of 2-chloro-1,1,1,2-tetrafluoropropane, 2-chloro-3,3,3-trifluoropropene, and hydrogen fluoride, and a second bottoms stream comprising a purified organic feedstock substantially free of hydrogen fluoride.
    • 提供了一种纯化有机原料的方法,其包括(a)蒸馏包含氟化氢,2-氯-1,1,1,2-四氟丙烷和2-氯-3,3,3-三氟丙烯的原始有机原料以产生 包含2-氯-1,1,1,2-四氟丙烷,2-氯-3,3,3-三氟丙烯和氟化氢的类共沸组合物的第一蒸馏物流和富含氟化氢的第一塔底物流 ; (b)冷却所述第一馏出物流以产生包含富含2-氯-1,1,1,2-四氟丙烷和2-氯-3,3,3-三氟丙烯的有机层和富含酸层的中间组合物 在氟化氢中; 和(c)蒸馏所述有机层以产生包含2-氯-1,1,1,2-四氟丙烷的共沸混合物组合物,2-氯-3,3,3-四氯丙烷的第二馏出物流, 三氟丙烯和氟化氢,以及包含基本上不含氟化氢的纯化有机原料的第二塔底物流。