Method for coproducing difluoromethane and 1,1,1,2-tetrafluoroethane
    2.
    发明授权
    Method for coproducing difluoromethane and 1,1,1,2-tetrafluoroethane 失效
    共同生产二氟甲烷和1,1,1,2-四氟乙烷的方法

    公开(公告)号:US5750810A

    公开(公告)日:1998-05-12

    申请号:US875656

    申请日:1997-07-30

    CPC分类号: C07C17/23 C07C17/269

    摘要: The present invention relates to the simultaneous manufacture of difluoromethane (F32) and 1,1,1,2-tetrafluoroethane (F134a) by pyrolysis of chlorodifluoromethane in the presence of hydrogen, working at a temperature above 500.degree. C. in the absence of any catalyst or metal surface. Depending on the operating conditions chosen, this process also makes it possible predominantly to manufacture either F134a or F32.

    摘要翻译: PCT No.PCT / FR96 / 00070 Sec。 371日期1997年7月30日 102(e)日期1997年7月30日PCT 1996年1月16日PCT PCT。 公开号WO96 / 25377 日期:1996年8月22日本发明涉及通过在氢气存在下热解氯二氟甲烷同时制造二氟甲烷(F32)和1,1,1,2-四氟乙烷(F134a),工作温度高于500℃。 在没有任何催化剂或金属表面的情况下。 根据所选的操作条件,此过程也可能主要制造F134a或F32。

    Process for the manufacture of 1,1,1,2-tetrafluorochloroethane and of
pentafluoroethane
    5.
    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。

    Surface demoisturizing composition and use thereof
    7.
    发明授权
    Surface demoisturizing composition and use thereof 失效
    表面净化组合物及其用途

    公开(公告)号:US4594177A

    公开(公告)日:1986-06-10

    申请号:US468499

    申请日:1983-02-22

    摘要: Demoisturizing composition used for the displacement of liquid water, comprising a chlorofluorocarbon that is liquid at room temperature, containing a surface-active agent responding to the formula: ##STR1## in which R is an alkyl group in C.sub.6 -C.sub.18R' is an alkyl group in C.sub.1 to C.sub.2R" is an alkyl group in C.sub.1 to C.sub.18p is a value ranging between 1 and 2characterized in that the surface-active composition is prepared by mixing the following three constituents: ##STR2## where R.sub.F represents a straight or branched perfluorinated alkyl chain of formula C.sub.q F.sub.2q+1 in which q is a whole number ranging between 2 and 20 and where X is a divalent bond group that may be partially halogenated and R.sub.1 and R.sub.2 represent a hydrogen atom, an alkyl radical or a hydroxyalkyl radical, containing less than 6 carbon atoms.

    摘要翻译: 用于置换液态水的脱模组合物,其包含在室温下为液体的含氟氟烃,其含有响应于下式的表面活性剂:其中R是C 6 -C 18 R'中的烷基是烷基 C1至C2中的基团R“是C1至C18中的烷基,p为1至2的范围,其特征在于表面活性组合物通过混合以下三种成分制备:(R'O )p(OH)2-pPO2H其中RF表示式CqF2q + 1的直链或支链全氟化烷基链,其中q是2和20之间的整数,并且其中X是可以部分的二价键基团 卤代,R 1和R 2表示含有少于6个碳原子的氢原子,烷基或羟烷基。

    Process for the purification of 1,1,1,2-tetrafluoroethane
    9.
    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:US5705718A

    公开(公告)日:1998-01-06

    申请号:US730738

    申请日:1996-10-15

    CPC分类号: C07C17/395

    摘要: To remove the unsaturated 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, of hydrofluoric acid and of chlorine is treated in gaseous phase in the presence of a fluorination catalyst at a temperature of between 100.degree. and 300.degree. C. and at a pressure between atmospheric pressure and 2.5 MPa, the molar ratio HF/F134a being between 0.05 and 0.5 and the molar ratio Cl.sub.2 /F134a between 0.0001 and 0.1.

    摘要翻译: 为了除去原料1,1,1,2-四氟乙烷(F134a)中存在的不饱和杂质(特别是1-氯-2,2-二氟乙烯和多氟丙烯),氢氟酸和氯的粗F134a的气体混合物是 在氟化催化剂存在下,在100〜300℃的温度和大气压〜2.5MPa的压力下,在气相中处理,HF / F134a的摩尔比为0.05〜0.5,Cl 2的摩尔比 / F134a在0.0001和0.1之间。