Production of hydrofluoroalkanes
    1.
    发明授权
    Production of hydrofluoroalkanes 失效
    生产氢氟烷烃

    公开(公告)号:US5902913A

    公开(公告)日:1999-05-11

    申请号:US796902

    申请日:1997-02-06

    摘要: A process for the co-production of two or more hydrofluoroalkanes which comprises contacting an alkene or a halogenated alkane with hydrogen fluoride at elevated temperature in the presence of a fluorination catalyst to produce a first hydrofluoroalkane and wherein an organic precursor to a second hydrofluoroalkane is provided in the process whereby to produce a second hydrofluoroalkane in addition to the first hydrofluoroalkane. In particularly preferred embodiments of the process, the first hydrofluoroalkane is 1,1,1,2-tetrafluoroethane derived from 1-chloro-2,2,2-trifluoroethane or trichloroethylene and the second hydrofluoroalkane is one or more of pentafluoroethane, difluoromethane and 1,1,2,2-tetrafluoroethane.

    摘要翻译: 共同生产两种或更多种氢氟烷烃的方法,其包括使烯烃或卤代烷烃与氟化氢在氟化催化剂存在下在升高的温度下接触以产生第一氢氟烷烃,并且其中提供第二氢氟烷烃的有机前体 在除了第一氢氟烷烃之外还生产第二氢氟烷烃的方法中。 在该方法的特别优选的实施方案中,第一氢氟烷烃是衍生自1-氯-2,2,2-三氟乙烷或三氯乙烯的1,1,1,2-四氟乙烷,第二氢氟烷烃是五氟乙烷,二氟甲烷和1 ,1,2,2-四氟乙烷。

    Production of difluoromethane
    3.
    发明授权
    Production of difluoromethane 失效
    生产二氟甲烷

    公开(公告)号:US5672786A

    公开(公告)日:1997-09-30

    申请号:US507429

    申请日:1995-09-06

    CPC分类号: C07C17/206

    摘要: A process for the production of difluoromethane comprising (a) contacting dichloromethane with hydrogen fluoride in the presence of a fluorination catalyst to produce a product stream comprising difluoromethane, monochloromonofluoromethane and unreacted starting materials and (b) separating difluoromethane from the product stream from step (a), wherein sufficient hydrogen fluoride is employed in the process such that during step (b) the molar ratio of hydrogen fluoride to monochloromonofluoromethane is at least about 100:1.

    摘要翻译: PCT No.PCT / GB94 / 00497 Sec。 371日期:1995年9月6日 102(e)日期1995年9月6日PCT 1994年3月14日PCT公布。 公开号WO94 / 21579 日本公报1994年9月29日制造二氟甲烷的方法,包括(a)在氟化催化剂存在下使二氯甲烷与氟化氢接触,生成包含二氟甲烷,一氯一氟甲烷和未反应的原料的产物流,和(b)从产物中分离二氟甲烷 其中在该方法中使用足够的氟化氢,使得在步骤(b)期间氟化氢与一氯一氟甲烷的摩尔比为至少约100:1。