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    Purification of 1,1,1,3,3-pentafluoropropane (R-245fa)
    6.
    发明授权
    Purification of 1,1,1,3,3-pentafluoropropane (R-245fa) 失效
    1,1,1,3,3-五氟丙烷（R-245fa）的纯化

    公开(公告)号：US6077982A

    公开(公告)日：2000-06-20

    申请号：US123381

    申请日：1998-07-27

    申请人： Stephen Frederic Yates ,  Romulus Gaita

    发明人： Stephen Frederic Yates ,  Romulus Gaita

    IPC分类号： C07C17/395 ,  C07C19/08 ,  C07C17/38

    CPC分类号： C07C17/395

    摘要： In the synthesis of 1,1,1,3,3-pentafluoropropane (R-245fa), a mixture of R-245fa and the impurity 1-chloro-3,3,3-trifluoropropene (R-1233zd) is purified and R-1233zd is removed from the mixture by contacting the mixture with 1-5 mols of chlorine for each mol of R-1233zd in the presence of ultraviolet light having a wavelength between about 300 to 400 nm which provides at least 0.02 watts-hour/kg of the mixture, the R-1233zd being reduced to below 10 wt. ppm or lower, as it is converted to 1,2,2-trichloro-3,3,3-trifluoropropane (R-233) or other propane which contains more chlorine and which has a higher boiling point than R-245fa and can be separated easily from R-245fa, the photochlorination being effected in a manner such that at least about 96 wt. % of the starting amount of R-245fa is maintained in the mixture.

    摘要翻译： 在合成1,1,1,3,3-五氟丙烷（R-245fa）中，纯化R-245fa和杂质1-氯-3,3,3-三氟丙烯（R-1233zd）的混合物，R 在波长为约300至400nm的紫外光存在下，每摩尔R-1233zd将混合物与1-5摩尔氯接触，从而从混合物中除去-1233zd，其提供至少0.02瓦特/小时 的混合物，将R-1233zd还原成低于10wt。 ppm或更低，因为其转化为1,2,2-三氯-3,3,3-三氟丙烷（R-233）或其它含有较多氯并且沸点高于R-245fa的丙烷，并且可以是 从R-245fa容易地分离，光氯化以这样的方式进行，使得至少约96wt。 在混合物中保持R-245fa的起始量的％。

    Purification of 1,1,1,3,3-pentafluorobutane
    8.
    发明授权
    Purification of 1,1,1,3,3-pentafluorobutane 有权
    1,1,1,3,3-五氟丁烷的纯化

    公开(公告)号：US06702929B2

    公开(公告)日：2004-03-09

    申请号：US10337836

    申请日：2003-01-07

    申请人： Stephen Frederic Yates ,  Hsueh Sung Tung

    发明人： Stephen Frederic Yates ,  Hsueh Sung Tung

    IPC分类号： C07C1700

    CPC分类号： C07C17/395 ,  C07C19/08

    摘要： In the synthesis of 1,1,1,3,3-pentafluorobutane (R-365mfc), a mixture of R-365mfc and the impurity 1,1,1,3-tetrafluoro-2-butene (R-1354mzy) is purified and R-1354mzy is removed from the mixture by contacting the mixture with 1-5 mols of chlorine for each mol of R-1354mzy in the presence of ultraviolet light having a wavelength between about 300 to 400 nm which provides at least 0.02 watts-hour/kg of the mixture. The R-1354mzy is reduced to below 10 wt. ppm as it is converted to 2,3-dichloro-1,1,1,3-tetrafluorobutane (R-354) or other butane containing more chlorine and having a higher boiling point than R-365mfc. The butane(s) may be separated more easily from R-365mfc. The photochlorination is effected in a manner such that at least about 96 weight percent of the starting amount of R-365mfc is maintained in the mixture.

    摘要翻译： 在1,1,1,3,3-五氟丁烷（R-365mfc）的合成中，纯化R-365mfc和杂质1,1,1,3-四氟-2-丁烯（R-1354mzy）的混合物 并且在波长在约300至400nm之间的紫外光存在下，将混合物与1-5摩尔氯接触，每摩尔R-1354毫摩尔，从混合物中除去R-1354mzy，该紫外线提供至少0.02瓦时 / kg混合物。 将R-1354mzy还原成低于10wt。 ppm，因为它被转化为2,3-二氯-1,1,1,3-四氟丁烷（R-354）或其它含有更多氯且沸点高于R-365mfc的丁烷。 丁烷可能更容易从R-365mfc分离出来。 光氯化以这样的方式进行，使得至少约96重量％的起始量的R-365mfc保持在混合物中。