PROCESS FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE
    4.
    发明申请
    PROCESS FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE 有权
    生产2,3,3,3-四氯丙烯的方法

    公开(公告)号:US20140350309A1

    公开(公告)日:2014-11-27

    申请号:US14351688

    申请日:2012-10-10

    IPC分类号: C07C17/25

    摘要: The present invention relates, in part, to the discovery that the presence of impurities in a reactor for dehydrochlorinating HCFC-244bb to HFO-1234yf results in a reduced conversion rate and/or a selectivity changeover from HFO-1234yf to HCFO-1233xf. By substantially removing such impurities, it is shown that the conversion rate may be improved and selectivity to HFO-C 1234yf via dehydrochlorination of HCFC-244bb is also improved.

    摘要翻译: 本发明部分涉及以下发现,即将HCFC-244bb脱氯化氢反应成HFO-1234yf的反应器中的杂质的存在导致从HFO-1234yf到HCFO-1233xf的转化率和/或选择性转换率降低。 通过基本上除去这些杂质,可以看出可以提高转化率,并且还提高了通过HCFC-244bb的脱氯化氢对HFO-C 1234yf的选择性。

    Catalytic equilibration to increase the relative mole fraction of CF3CHCI, CF3CHCI2, or CF3CF2H in a composition
    7.
    发明申请
    Catalytic equilibration to increase the relative mole fraction of CF3CHCI, CF3CHCI2, or CF3CF2H in a composition 失效
    催化平衡以增加组合物中CF 3 CHCl,CF 3 CHCl 2或CF 3 CF 2 H的相对摩尔分数

    公开(公告)号:US20030139634A1

    公开(公告)日:2003-07-24

    申请号:US10359357

    申请日:2003-02-06

    IPC分类号: C07C019/08

    摘要: A method is disclosed for increasing in a composition the mole fraction of a compound selected from the group CF3CHCl2, CF3CHF2 and CF3CHClF relative to the total mole fraction of the other two compounds of the group. The method comprises (a) providing a gaseous composition comprising at least one compound of said group provided that (i) if the selected compound is either CF3CHCl2 or CF3CHF2, said gaseous composition comprises CF3CHFCl and the mole fraction of the selected compound relative to the other two compounds in said gaseous composition is less than its equilibrium amount at 50null C., and (ii) if the selected compound is CF3CHFCl, said gaseous composition comprises both CF3CHCl2 and CF3CHF2 and the mole fraction of the selected compound relative to the other two compounds in said gaseous composition is less than its equilibrium amount at 500null C.; (b) contacting said gaseous composition with a catalyst selected from the group of catalysts consisting of catalysts comprising chromium as an oxide, as a halide or as a halided oxide, in a valence state of three to six, and supported catalysts containing at least one metal selected from cobalt, copper, iron, manganese, nickel and zinc for a time sufficient to provide substantial equilibrium between the three compounds having said formula; and (c) providing during said catalyst contact a temperature within the range of about 50null C. to 500null C. at which the mole fraction of the selected compound relative to the other two compounds increases.

    摘要翻译: 公开了一种增加组合物相对于该组其他两种化合物的总摩尔分数的选自CF 3 CHCl 2,CF 3 CHF 2和CF 3 CHClF的化合物的摩尔分数的方法。 该方法包括(a)提供包含至少一种所述基团的化合物的气体组合物,条件是(i)如果所选择的化合物是CF 3 CHCl 2或CF 3 CHF 2,则所述气态组合物包含CF 3 CHFCl,所选化合物相对于另一种的摩尔分数 所述气体组合物中的两种化合物在50℃下小于其平衡量,和(ii)如果选择的化合物是CF 3 CHFCl,则所述气态组合物包含CF 3 CHCl 2和CF 3 CHF 2,并且所选化合物相对于另外两种化合物的摩尔分数 所述气态组合物中的化合物在500℃下小于其平衡量; (b)使所述气态组合物与选自催化剂的催化剂接触,所述催化剂由包含铬作为氧化物的催化剂组成,作为卤化物或作为卤化氧化物以三价至六价的价态,以及负载型催化剂,其含有至少一种 选自钴,铜,铁,锰,镍和锌的金属足以在具有所述式的三种化合物之间提供实质平衡的时间; 和(c)在所述催化剂接触期间提供在约50℃至500℃的范围内的温度,在该温度下所选化合物的摩尔分数相对于其它两种化合物的摩尔分数增加。