Process for preparing HCFC-123
    12.
    发明授权
    Process for preparing HCFC-123 失效
    制备HCFC-123的方法

    公开(公告)号:US06300529B1

    公开(公告)日:2001-10-09

    申请号:US09084318

    申请日:1998-05-26

    IPC分类号: C07C1908

    摘要: Process for preparing HCFC-123 with a content of olefins lower than 10 ppm and very small amounts of HCFC-123a and 123b by dismutation of HCFC-124 in gaseous phase by contact with a catalyst which essentially consists of three valence chromium oxide supported on aluminum fluoride, at temperatures in the range 150°-260° C., and with contact times between 5-25 sec.

    摘要翻译: 通过与基本上由负载在铝上的三价铬氧化物组成的催化剂接触而在气相中鉴定HCFC-124,制备具有低于10ppm的烯烃含量的HCFC-123和非常少量的HCFC-123a和123b的方法 氟化物,温度范围为150°-260℃,接触时间为5-25秒。

    Process for preparing 1,1,1,2-tetrafluoroethane
    16.
    发明授权
    Process for preparing 1,1,1,2-tetrafluoroethane 失效
    制备1,1,1,2-四氟乙烷的方法

    公开(公告)号:US5608125A

    公开(公告)日:1997-03-04

    申请号:US507644

    申请日:1995-07-25

    摘要: 1,1,1,2-tetrafluoroethane (134a) is prepared by reacting, in the gas phase, trichloroethylene with 1,1,1-trifluorochloroethane (133a) and hydrofluoric acid with trichloroethylene/133a molar ratios ranging from 5/95 to 50/50, in the presence of a catalyst consisting of Cr.sub.2 O.sub.3 carried on AlF.sub.3.The process provides 134a yields higher than 90% and permits an exceptionally long life of the catalyst. In this way it is possible to realize a continuous process by recycling the unreacted trichloroethylene and 133a, thereby making up for the relatively low global conversion of the reagents.

    摘要翻译: 1,1,1,2-四氟乙烷(134a)是通过在气相中使三氯乙烯与1,1,1-三氟氯乙烷(133a)和三氟乙烯/ 133a摩尔比为5/95至50的氢氟酸反应制备的 / 50,在由AlF3承载的Cr2O3组成的催化剂存在下。 该方法提供134a产率高于90%并且允许催化剂的使用寿命特别长。 以这种方式,可以通过再循环未反应的三氯乙烯和133a来实现连续的方法,从而弥补了试剂的相对低的全局转化率。

    Process for preparing pentafluoroethane
    17.
    发明授权
    Process for preparing pentafluoroethane 失效
    五氟乙烷的制备方法

    公开(公告)号:US06232514B1

    公开(公告)日:2001-05-15

    申请号:US08812311

    申请日:1997-03-05

    IPC分类号: C07C1700

    摘要: Process for preparing pentafluoroethane (HFC-125) wherein 1,1,1-trifluorodichloroethane (HFC-123) is reacted with HF at a temperature from 310° to 380° C., in the presence of a catalyst comprising Cr2O3 supported on preformed AlF3. HFC-125 is obtained with high yields (up to 60-70% and over), high conversions (over 80%) and high selectivity, i.e. formation of by-product in very low amounts (5% by moles at most) Moreover, the catalyst maintains a high activity for a long time also with high organic charges.

    摘要翻译: 制备五氟乙烷(HFC-125)的方法,其中1,1,1-三氟二氯乙烷(HFC-123)与HF在310℃至380℃的温度下,在载有预先形成的AlF 3的Cr 2 O 3 。 以高产率(高达60-70%及以上),高转化率(超过80%)和高选择性获得HFC-125,即以非常低的量(最多5摩尔%)形成副产物。此外, 催化剂长时间保持高活性,同时也具有高有机电荷。

    Process for preparing 1,1,1,2-tetrafluoroethane
    19.
    发明授权
    Process for preparing 1,1,1,2-tetrafluoroethane 失效
    制备1,1,1,2-四氟乙烷的方法

    公开(公告)号:US6037508A

    公开(公告)日:2000-03-14

    申请号:US209942

    申请日:1998-12-11

    摘要: 1,1,1,2-tetrafluoroethane (134a) is prepared by reacting, in the gas phase, trichloroethylene with 1,1,1-trifluorochloroethane (133a) and hydrofluoric acid with trichloroethylene/133a molar ratios ranging from 5/95 to 50/50, in the presence of a catalyst consisting of Cr.sub.2 O.sub.3 carried on AlF.sub.3.The process provides 134a yields higher than 90% and permits an exceptionally long life of the catalyst. In this way it is possible to realize a continuous process by recycling the unreacted trichloroethylene and 133a, thereby making up for the relatively low global conversion of the reagents.

    摘要翻译: 1,1,1,2-四氟乙烷(134a)是通过在气相中使三氯乙烯与1,1,1-三氟氯乙烷(133a)和三氟乙烯/ 133a摩尔比为5/95至50的氢氟酸反应制备的 / 50,在由AlF3承载的Cr2O3组成的催化剂存在下。 该方法提供134a产率高于90%并且允许催化剂的使用寿命特别长。 以这种方式,可以通过再循环未反应的三氯乙烯和133a来实现连续的方法,从而弥补了试剂的相对低的全局转化率。

    Process for purifying pentafluoroethane from chloropentafluoroethane
    20.
    发明授权
    Process for purifying pentafluoroethane from chloropentafluoroethane 有权
    从五氟乙烷中提纯五氟乙烷的方法

    公开(公告)号:US06512150B1

    公开(公告)日:2003-01-28

    申请号:US09618116

    申请日:2000-07-17

    IPC分类号: C07C1738

    摘要: A gaseous process for reducing the amount of chloropentafluoroethane (CFC 115) impurity present in pentafluoroethane (HFC 125) characterized in that pentafluroethane is allowed to flow on a catalyst formed by a trivalent chromium salt, optionally supported, at temperatures in the range 200° C.-400° C., obtaining the reaction of chloropentafluoroethane with pentafluoroethane with formation of hexafluoroethane (FC 116) and tetrafluorochloroethane (HCFC 124).

    摘要翻译: 用于减少存在于五氟乙烷(HFC 125)中的五氟乙烷(CFC 115)杂质的量的气体方法,其特征在于使五氟乙烷在任选负载的三价铬盐形成的催化剂上流动,温度范围为200℃ 400℃,得到五氟乙烷与五氟乙烷与六氟乙烷(FC 116)和四氟氯乙烷(HCFC 124)的反应。