Synthesis of perfluoroalkyl iodides
    7.
    发明授权
    Synthesis of perfluoroalkyl iodides 失效
    全氟烷基碘化物的合成

    公开(公告)号:US5650545A

    公开(公告)日:1997-07-22

    申请号:US452759

    申请日:1995-05-30

    CPC分类号: C07C17/278 Y02P20/582

    摘要: The invention relates to a continuous process for the preparation of perfluoroalkyl iodides by thermal telomerization, in the gas phase, of tetrafluoroethylene with pentafluoroethyl iodide or heptafluoroisopropyl iodide in a tubular reactor.To improve the selectivity for a telomer of the desired extent, the telomers of lesser extent are recycled to at least one point in the reactor, which is situated between one-twentieth and three-quarters the length of the tube.

    摘要翻译: 本发明涉及通过在管式反应器中四氟乙烯与五氟乙基碘或七氟异丙基碘在气相中的热调聚来制备全氟烷基碘化物的连续方法。 为了提高所需程度的调节物的选择性,较小程度的调节剂被再循环到反应器中的至少一个点,其位于管的长度的二十分之一到四分之三之间。

    Process for drying difluoromethane
    9.
    发明授权
    Process for drying difluoromethane 有权
    二氟甲烷干燥方法

    公开(公告)号:US07273512B2

    公开(公告)日:2007-09-25

    申请号:US10278587

    申请日:2002-10-23

    申请人: Rene Bertocchio

    发明人: Rene Bertocchio

    IPC分类号: B01D53/02

    CPC分类号: C07C17/38 B01J20/3408

    摘要: Process for drying wet F32, which comprises placing a stream of the said F32 in continuous contact with a feed stock of a composition comprising a molecular sieve chosen from a 3A type sieve, at a temperature of between 5 and 78° C. and at a pressure of between 0.5 and 25 atm.

    摘要翻译: 用于干燥湿F32的方法,其包括将所述F32的物流与包含选自3A型筛分子筛的组合物的原料在5至78℃之间的温度下连续接触, 压力在0.5至25atm之间。