Purification of 1, 1-difluoroethane
    7.
    发明授权
    Purification of 1, 1-difluoroethane 失效
    纯化1,1-二氟乙烷

    公开(公告)号:US5744661A

    公开(公告)日:1998-04-28

    申请号:US729702

    申请日:1996-10-07

    IPC分类号: C07C17/38

    CPC分类号: C07C17/38

    摘要: A method for removing unsaturated impurities from 1,1-difluoroethane by intimately contacting the impure 1,1-difluoroethane with sulfuric acid. This process is especially useful for removing one or more unsaturated halocarbons having two carbon atoms such as vinyl chloride, vinyl fluoride and blends thereof from the 1,1-difluoroethane.

    摘要翻译: 通过使不纯的1,1-二氟乙烷与硫酸紧密接触,从1,1-二氟乙烷除去不饱和杂质的方法。 该方法特别可用于从1,1-二氟乙烷中除去具有两个碳原子的一种或多种不饱和卤代烃,如氯乙烯,氟乙烯及其共混物。

    Purified 1,1,1,3,3,3-hexafluoropropane and method for making same
    9.
    发明授权
    Purified 1,1,1,3,3,3-hexafluoropropane and method for making same 失效
    纯化1,1,1,3,3,3-六氟丙烷及其制备方法

    公开(公告)号:US5856595A

    公开(公告)日:1999-01-05

    申请号:US40254

    申请日:1998-03-03

    IPC分类号: C07C17/38 C07C17/395

    CPC分类号: C07C17/38 C07C17/395

    摘要: A 1,1,1,3,3,3-hexafluoropropane product of greater than about 99.9 weight percent purity containing less than about 100 parts per million unsaturated fluorocarbons and a method for its purification from a distillation mixture of 1,1,1,3,3,3-hexafluoropropane with at least one unsaturated fluorocarbon which method includes the steps of:a) reacting the mixture with chlorine to saturate the unsaturated fluorocarbons,b) washing the reacted mixture with an aqueous solution to remove residual hydrochloric acid and chlorine,c) removing the aqueous solution, andd) distilling the reacted mixture to obtain a 1,1,1,3,3,3-hexafluoropropane product of greater than about 99.9 weight percent purity containing less than about 100 parts per million unsaturated fluorocarbons.

    摘要翻译: 含有大于约99.9重量百分比的纯度的1,1,1,3,3,3-六氟丙烷产品,其含量低于约100ppm /百万份不饱和碳氟化合物,以及其从1,1,1,3,3-六氟丙烷的蒸馏混合物中纯化的方法, 具有至少一种不饱和碳氟化合物的3,3,3-六氟丙烷该方法包括以下步骤:a)使混合物与氯反应以饱和不饱和碳氟化合物,b)用水溶液洗涤反应混合物以除去残留的盐酸和氯 ,c)除去水溶液,和d)蒸馏反应的混合物,得到大于约99.9重量%纯度的1,1,1,3,3,3-六氟丙烷产物,其含有少于约100ppm的不饱和碳氟化合物 。

    Purified 1,1,1,3,3,3-hexafluoropropane and method for making same
    10.
    发明授权
    Purified 1,1,1,3,3,3-hexafluoropropane and method for making same 有权
    纯化1,1,1,3,3,3-六氟丙烷及其制备方法

    公开(公告)号:US06274779B1

    公开(公告)日:2001-08-14

    申请号:US09513899

    申请日:2000-02-28

    IPC分类号: C07C1908

    摘要: A 1,1,1,3,3,3-hexafluoropropane product of greater than about 99.9 weight percent purity containing less than about 100 parts per million unsaturated fluorocarbons and a method for its purification from a distillation mixture of 1,1,1,3,3,3-hexafluoropropane with at least one unsaturated fluorocarbon which method includes the steps of: a) reacting the mixture with chlorine to saturate the unsaturated fluorocarbons, b) washing the reacted mixture with an aqueous solution to remove residual hydrochloric acid and chlorine, c) removing the aqueous solution, and d) distilling the reacted mixture to obtain a 1,1,1,3,3,3-hexafluoropropane product of greater than about 99.9 weight percent purity containing less than about 100 parts per million unsaturated fluorocarbons.

    摘要翻译: 含有大于约99.9重量百分比的纯度的1,1,1,3,3,3-六氟丙烷产品,其含量低于约100ppm /百万份不饱和碳氟化合物,以及其从1,1,1,3,3-六氟丙烷的蒸馏混合物中纯化的方法, 具有至少一种不饱和碳氟化合物的3,3,3-六氟丙烷该方法包括以下步骤:a)使混合物与氯反应以饱和不饱和碳氟化合物,b)用水溶液洗涤反应混合物以除去残留的盐酸和氯 ,c)除去水溶液,和d)蒸馏反应的混合物,得到大于约99.9重量%纯度的含有少于约100份/百万个不饱和碳氟化合物的1,1,1,3,3,3-六氟丙烷产物。