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    • 3. 发明公开
    • Method for producing fluorinated organic compounds
    • 生产氟化有机化合物的方法
    • EP2546224A2
    • 2013-01-16
    • EP12178208.0
    • 2007-01-03
    • Honeywell International Inc.
    • Merkel, Daniel, C.Tung, Hsueh, SungVan der Puy, MichaelMa, Jing, JiDubey RajeshLight, BarbaraBortz, CherylPhillips, Steven, D.Mukhopahyay, Sudip
    • C07C17/087C07C21/19C09K5/00
    • C07C19/10C07C17/04C07C17/06C07C17/087C07C17/206C07C17/21C07C17/25C07C21/18C07C19/01C07C21/073
    • Disclosed are processes for the production of fluorinated olefins, preferably adapted to commercialization of CF 3 CF=CH 2 (1234yf). Three steps may be used in preferred embodiments in which a feedstock such as CCl 2 =CClCH 2 Cl (which may be purchased or synthesized from 1,2,3- trichloropropane) is fluorinated (preferably with HF in gas-phase in the presence of a catalyst) to synthesize a compound such as CF 3 CCl=CH 2 , preferably in a 80-96% selectivity. The CF 3 CCl=CH 2 is preferably converted to CF 3 CFClCH 3 (244-isomer) using a SbCl 5 as the catalyst which is then transformed selectively to 1234yf, preferably in a gas-phase catalytic reaction using activated carbon as the catalyst. For the first step, a mixture of Cr 2 O 3 and FeCl 3 /C is preferably used as the catalyst to achieve high selectivity to CF 3 CCl=CH 2 (96%). In the second step, SbCl 5 /C is preferably used as the selective catalyst for transforming 1233xf to 244-isomer, CF 3 CFClCH 3 . The intermediates are preferably isolated and purified by distillation and used in the next step without further purification, preferably to a purity level of greater than about 95%.
    • 公开了生产氟化烯烃的方法,优选适用于CF 3 CF = CH 2(1234yf)的商业化。 在优选的实施方案中可以使用三个步骤,其中原料例如CCl 2 = CClCH 2 Cl(其可以购买或由1,2,3-三氯丙烷合成)被氟化(优选在存在催化剂的情况下与气相的HF一起) 合成化合物如CF 3 CCl = CH 2,优选以80-96%的选择性。 CF 3 CCl = CH 2优选使用SbCl 5作为催化剂转化为CF 3 CFClCH 3(244-异构体),然后将其选择性地转化为1234yf,优选在使用活性炭作为催化剂的气相催化反应中。 对于第一步,优选使用Cr 2 O 3和FeCl 3 / C的混合物作为催化剂以实现对CF 3 CCl = CH 2(96%)的高选择性。 在第二步中,SbCl5 / C优选用作将1233xf转化成244-异构体CF3CFClCH3的选择性催化剂。 中间体优选通过蒸馏分离和纯化,并且不经进一步纯化而用于下一步骤中,优选达到大于约95%的纯度水平。