METHOD FOR PRODUCING FLUORINATED ORGANIC COMPOUNDS
    3.
    发明申请
    METHOD FOR PRODUCING FLUORINATED ORGANIC COMPOUNDS 审中-公开
    生产氟化有机化合物的方法

    公开(公告)号:US20150315108A1

    公开(公告)日:2015-11-05

    申请号:US14269251

    申请日:2014-05-05

    IPC分类号: C07C17/20

    摘要: Disclosed are processes for the production of fluorinated olefins, preferably adapted to commercialization of CF3CF═CH2 (1234yf). Three steps may be used in preferred embodiments in which a feedstock such as CCl2═CClCH2Cl (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 CF3CCl═CH2, preferably in a 80-96% selectivity. The CF3CCl═CH2 is preferably converted to CF3CFClCH3 (244-isomer) using a SbCl5 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 Cr2O3 and FeCl3/C is preferably used as the catalyst to achieve high selectivity to CF3CCl═CH2 (96%). In the second step, SbCl5/C is preferably used as the selective catalyst for transforming 1233xf to 244-isomer, CF3CFClCH3. 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%.

    摘要翻译: 公开了用于生产氟化烯烃的方法,优选适于CF 3CF≡CH2(1234yf)的商业化。 在优选实施方案中可以使用三个步骤,其中诸如CCl 2 = CClCH 2 Cl(其可以由1,2,3-三氯丙烷购买或合成)的原料被氟化(优选在气相存在下,在HF的存在下) 合成化合物如CF 3 CCl = CH 2,优选选择性为80-96%。 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,SbCl 5 / C优选用作用于将1233xf转化为244-异构体CF 3 CFClCH 3的选择性催化剂。 中间体优选通过蒸馏分离和纯化,并用于下一步骤而不进一步纯化,优选纯度高于约95%。