Process for the manufacture of 1,1,1,2-tetrafluorochloroethane and of
pentafluoroethane
    4.
    发明授权
    Process for the manufacture of 1,1,1,2-tetrafluorochloroethane and of pentafluoroethane 失效
    制备1,1,1,2-四氟氯乙烷和五氟乙烷的方法

    公开(公告)号:US5354928A

    公开(公告)日:1994-10-11

    申请号:US65422

    申请日:1993-05-24

    摘要: The invention relates to a process for the manufacture of 1,1,1,2-tetrafluorochloroethane and of pentafluoroethane.The process which consists of gas phase catalytic fluorination of at least one pentahaloethane of formula C.sub.2 HX.sub.2-n F.sub.3+n in which X denotes a chlorine or bromine atom and n the number 0 or 1, by hydrofluoric acid, is characterized in that a catalyst is employed consisting of a catalytic quantity of chromium in an oxidation state equal to or greater than 3 and of an activated charcoal as support.The selectivity for 1,1,1,2-tetrafluorochloroethane and pentafluoroethane reaches approximately 95% and even more.

    摘要翻译: 本发明涉及一种制备1,1,1,2-四氟氯乙烷和五氟乙烷的方法。 由氢氟酸将至少一种式为C 2 H x 2-n F 3 + n的五卤代乙烷(其中X表示氯或溴原子,数字0或1)的气相催化氟化的方法的特征在于使用催化剂 由催化量的等于或大于3的氧化态的铬和作为载体的活性炭组成。 1,1,1,2-四氟氯乙烷和五氟乙烷的选择性达到约95%甚至更高。

    Process for the manufacture of 1,1,1,2-Tetrafluoroethane
    9.
    发明授权
    Process for the manufacture of 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:US5731481A

    公开(公告)日:1998-03-24

    申请号:US772521

    申请日:1996-12-24

    CPC分类号: C07C17/206

    摘要: The invention relates to the manufacture of 1,1,1,2-tetrafluoroethane (F134a) by gas-phase catalytic fluorination of 1-chloro-2,2,2-trifluoroethane (F133a). A mixed catalyst is employed, composed of nickel and chromium oxides, halides and/or oxyhalides deposited on a support consisting of aluminium fluoride or of a mixture of aluminium fluoride and alumina. This mixed catalyst makes it possible to obtain an excellent selectivity for F134a with a high production efficiency.

    摘要翻译: 本发明涉及通过1-氯-2,2,2-三氟乙烷(F133a)的气相催化氟化制备1,1,1,2-四氟乙烷(F134a)。 使用由镍和铬氧化物组成的混合催化剂,沉积在由氟化铝或氟化铝和氧化铝的混合物组成的载体上的卤化物和/或氧卤化物。 该混合催化剂使得可以以高生产效率获得对F134a的优异选择性。

    Process for the purification of 1,1,1,2-tetrafluoroethane
    10.
    发明授权
    Process for the purification of 1,1,1,2-tetrafluoroethane 失效
    1,1,1,2-四氟乙烷纯化方法

    公开(公告)号:US5430205A

    公开(公告)日:1995-07-04

    申请号:US329600

    申请日:1994-10-26

    CPC分类号: C07C17/395

    摘要: In order to remove the olefinic impurities (in particular 1-chloro-2,2-difluoroethylene and polyfluoropropenes) present in crude 1,1,1,2-tetrafluoroethane (F134a), a gaseous mixture of crude F134a, hydrofluoric acid and oxygen or air is treated in the gas phase, in the presence of a fluorination catalyst, at a temperature between 200.degree. and 350.degree. C. and at a pressure between atmospheric pressure and 2.5 MPa, the HF/F134a molar ratio being between 0.05 and 0.5 and the O.sub.2 /F134a molar ratio being between 0.001 and 0.1.

    摘要翻译: 为了除去原料1,1,1,2-四氟乙烷(F134a)中存在的烯烃杂质(特别是1-氯-2,2-二氟乙烯和多氟丙烯),粗F134a,氢氟酸和氧的气体混合物或 空气在气相中,在氟化催化剂的存在下,在200-350℃的温度和大气压至2.5MPa的压力下进行处理,HF / F134a摩尔比为0.05-0.5,和 O2 / F134a摩尔比为0.001至0.1。