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    Tetrafluoropropene production processes
    1.
    发明授权
    Tetrafluoropropene production processes 有权
    四氟丙烯生产工艺

    公开(公告)号：US08377327B2

    公开(公告)日：2013-02-19

    申请号：US12758839

    申请日：2010-04-13

    申请人： Velliyur Nott Mallikarjuna Rao ,  Mario Joseph Nappa ,  Allen Capron Sievert ,  Ralph Newton Miller

    发明人： Velliyur Nott Mallikarjuna Rao ,  Mario Joseph Nappa ,  Allen Capron Sievert ,  Ralph Newton Miller

    IPC分类号： C09K5/04

    CPC分类号： C07C21/18 ,  C07B2200/09 ,  C07C17/25

    摘要： A process is disclosed for the manufacture of CF3CF═CH2 and CF3CH═CHF. The process involves dehydrofluorinating CF3CHFCH2F in the presence of a dehydrofluorination catalyst to produce a product mixture comprising CF3CF═CH2 and CF3CH═CHF, and recovering said CF3CF═CH2 and CF3CH═CHF from the product mixture. The present invention also provides a composition comprising (a) the Z-isomer of CF3CH═CHF and (b) HF; wherein the HF is present in an effective amount to form an azeotropic combination with the Z—CF3CH═CHF.

    摘要翻译： 公开了用于制造CF 3CF≡CH2和CF 3 CH = CHF的方法。 该方法包括在脱氟化氢催化剂存在下对CF 3 CHFCH 2 F进行脱氟化氢，以产生包含CF 3CF≡CH2和CF 3 CH = CHF的产物混合物，并从产物混合物中回收所述CF 3CF≡CH2和CF 3 CH = CHF。 本发明还提供了包含（a）CF 3 CH = CHF的Z-异构体和（b）HF的组合物; 其中HF以有效量存在以与Z-CF 3 CH = CHF形成共沸组合。

    Processes for producing 2,3,3,3-tetrafluoropropene, a process for producing 1-chloro-2,3,3,3-pentafluoropropane and azeotropic compositions of 1-chloro-2,3,3,3-tetrafluoropropene with HF
    10.
    发明授权
    Processes for producing 2,3,3,3-tetrafluoropropene, a process for producing 1-chloro-2,3,3,3-pentafluoropropane and azeotropic compositions of 1-chloro-2,3,3,3-tetrafluoropropene with HF 有权

    公开(公告)号：US07906693B2

    公开(公告)日：2011-03-15

    申请号：US12442955

    申请日：2007-10-31

    申请人： Mario Joseph Nappa ,  Velliyur Nott Mallikarjuna Rao ,  Allen Capron Sievert

    发明人： Mario Joseph Nappa ,  Velliyur Nott Mallikarjuna Rao ,  Allen Capron Sievert

    IPC分类号： C07C17/00 ,  C07C19/08

    CPC分类号： C07C17/25 ,  C07C17/23 ,  C07C17/278 ,  C07C21/18 ,  C07C19/08 ,  C07C19/10

    摘要： A process is disclosed for making CH2═CFCF3. The process involves contacting CH2ClCF2CF3 with H2 in a reaction zone in the presence of a catalyst including a catalytically effective amount of palladium supported on a support selected from chromium oxide, fluorinated chromium oxide, chromium fluoride, aluminum oxide, aluminum fluoride and/or fluorinated alumina, to produce CH2═CFCF3. The mole ratio of H2 to the CH2ClCF2CF3 fed to the reaction zone is between about 1:1 and about 4:1. Also disclosed is another process for making CH2═CFCF3 that involves (a) reacting CH2ClCF2CF3 with H2 in the presence of a catalytically effective amount of hydrogenation catalyst to form CH3CF2CF3; and (b) dehydrofluorinating CH3CF2CF3 from (a) to form CH2═CFCF3; and another process for making CH2═CFCF3 that involves (1) dehydrofluorinating CH2ClCF2CF3 in the presence of a catalytically effective amount of dehydrofluorination catalyst to form CHCl═CFCF3; and (2) hydrogenating CHCl═CFCF3 from (1) in the presence of a hydrogenation catalyst including a catalytically effective amount of palladium supported on a support selected from chromium oxide, fluorinated chromium oxide, chromium fluoride, aluminum oxide, aluminum fluoride and/or fluorinated alumina to form CH2═CFCF3. Also disclosed is a process for making CH2ClCF2CF5. This process involves reacting CH2ClF with CF2═CF2 in a reaction zone in the presence of a catalytically effective amount of an aluminum halide composition having a bulk formula of AlClxBryF3-x-y wherein the average value of x is 0 to 3, the average value of y is 0 to 3-x, provided that the average values of x and y are not both 0. Also disclosed is an azeotropic composition including CF3CF═CHCl and HF.