Process for producing 1,1,1,2,2-pentafluoroethane
    1.
    发明授权
    Process for producing 1,1,1,2,2-pentafluoroethane 有权
    生产1,1,1,2,2-五氟乙烷的方法

    公开(公告)号:US06392106B1

    公开(公告)日:2002-05-21

    申请号:US09509989

    申请日:2000-04-05

    IPC分类号: C07C1708

    摘要: A process for producing 1,1,1,2,2-pentafluoroethane by fluorinating with hydrogen fluoride at least one of 2,2-dichloro-1,1,1-trifluoroethane and 2-chloro-1,1,1,2-tetrafluoroethane as a starting material, the process being characterized by separating the reaction mixture resulting from the fluorination into a product portion A mainly containing 1,1,1,2,2-pentafluoroethane and a product portion B mainly containing 2,2-dichloro-1,1,1-trifluoroethane, 2-chloro-1,1,1,2-tetrafluoroethane and hydrogen fluoride, removing a fraction mainly containing 2,2-dichloro-1,1,1,2-tetrafluoroethane from the product portion B, and recycling the rest of the product portion B as part of feedstocks for fluorination. According to the process of the invention, the amount of CFC-115 contained in the target HFC-125 can be remarkably reduced through a simplified procedure.

    摘要翻译: 一种通过用氟化氢氟化2,2-二氯-1,1,1-三氟乙烷和2-氯-1,1,1,2-四氟乙烷中的至少一种制备1,1,1,2,2-五氟乙烷的方法, 四氟乙烷为原料,该方法的特征在于将由氟化得到的反应混合物分离成主要含有1,1,1,2,2-五氟乙烷的产物部分A和主要含有2,2-二氯 - 1,1,1-三氟乙烷,2-氯-1,1,1,2-四氟乙烷和氟化氢,从产物部分B中除去主要含有2,2-二氯-1,1,1,2-四氟乙烷的馏分 ,并将产物部分B的其余部分作为用于氟化的原料的一部分进行再循环。根据本发明的方法,目标HFC-125中所含的CFC-115的量可以通过简化的程序显着降低。

    Manufacturing method for fluorine-containing ethane
    3.
    发明授权
    Manufacturing method for fluorine-containing ethane 有权
    含氟乙烷的制造方法

    公开(公告)号:US06455745B1

    公开(公告)日:2002-09-24

    申请号:US09743468

    申请日:2001-01-10

    IPC分类号: C07C1708

    摘要: Fluorochromium oxide having a fluorine content of not less than 30 wt. % is used for the fluorination reaction. To provide a manufacturing method for fluorine-containing ethane which contains 1,1,1,2,2-pentafluoroethane as the main component in which the reaction can be performed while controlling the generation of CFCs to the greatest possible extent by fluorinating at least on selected from the group composed of tetrachloroethylene, 2,2-dichloro-1,1,1-trifluoroethane and 2-chloro-1,1,1,2-tetrafluoroethane with hydrogen fluoride.

    摘要翻译: 氟含量不低于30重量%的氟化铬 %用于氟化反应。为了提供含有1,1,1,2,2-五氟乙烷作为主要成分的含氟乙烷的制造方法,其中可以进行反应,同时控制CFC的产生 通过至少在选自四氟乙烯,2,2-二氯-1,1,1-三氟乙烷和2-氯-1,1,1,2-四氟乙烷的组中氟化氢氟化物的最大可能程度。

    Process for preparing pentafluorodichloropropanes
    5.
    发明授权
    Process for preparing pentafluorodichloropropanes 失效
    五氟二氯丙烷的制备方法

    公开(公告)号:US5177274A

    公开(公告)日:1993-01-05

    申请号:US743686

    申请日:1991-08-12

    IPC分类号: C07C17/278

    CPC分类号: C07C17/278

    摘要: 1,1,1,2,2-Pentafluoro-3,3-dichloropropane and 1,1,2,2,3-pentafluoro-1,3-dichloropropane are prepared by reacting dichlorofluoromethane and tetrafluoroethylene in a solvent in the presence of a catalyst with improved conversion and selectivity.

    摘要翻译: 1,1,1,2,2-五氟-3,3-二氯丙烷和1,1,2,2,3-五氟-1,3-二氯丙烷是通过使二氯氟甲烷和四氟乙烯在溶剂中在 催化剂具有改进的转化率和选择性。