Process for preparing 1,1,1,2-tetrafluoroethane
    3.
    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 1,1,1-trifluoro-2-fluoroethane
    4.
    发明授权
    Process for purifying 1,1,1-trifluoro-2-fluoroethane 失效
    纯化1,1,1-三氟-2-氟乙烷的方法

    公开(公告)号:US5563305A

    公开(公告)日:1996-10-08

    申请号:US470758

    申请日:1995-06-06

    CPC分类号: C07C17/395

    摘要: 1,1,1-trifluoro-2-fluoroethane (CFC 134a) is purified from 1,1-difluoro-2-chloroethylene (CFC 1122) by reacting a mixture comprising said compounds with hydrofluoric acid, at temperatures from 200.degree. C. to 450.degree. C., in one presence of chrome oxide (Cr.sub.2 O.sub.3) in substantially crystalline form.

    摘要翻译: 通过使包含所述化合物的混合物与氢氟酸在200℃至200℃的温度下反应,从1,1-二氟-2-氯乙烯(CFC 1122)中纯化1,1,1-三氟-2-氟乙烷(CFC 134a)至 在一定程度上存在基本上结晶形式的氧化铬(Cr 2 O 3)。

    Process for preparing 1,1,1,2-tetrafluoroethane
    5.
    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 purifying 1,1,1-trifluoro-2-fluoroethane
    6.
    发明授权
    Process for purifying 1,1,1-trifluoro-2-fluoroethane 失效
    纯化1,1,1-三氟-2-氟乙烷的方法

    公开(公告)号:US5475168A

    公开(公告)日:1995-12-12

    申请号:US243066

    申请日:1994-05-16

    CPC分类号: C07C17/395

    摘要: 1,1,1-trifluoro-2-fluoroethane (CFC 134a) is purified from 1,1-difluoro-2-chloroethylene (CFC 1122) by reacting a mixture comprising said compounds with hydrofluoric acid, at temperatures from 200.degree. C. to 450.degree. C., in the presence of chrome oxide (Cr.sub.2 O.sub.3) in substantially crystalline form.

    摘要翻译: 通过使包含所述化合物的混合物与氢氟酸在200℃至200℃的温度下反应,从1,1-二氟-2-氯乙烯(CFC 1122)中纯化1,1,1-三氟-2-氟乙烷(CFC 134a)至 450℃,在基本上呈结晶形式的氧化铬(Cr 2 O 3)存在下进行。

    Process for preparing pentafluoroethane
    7.
    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。