AZEOTROPES OF METHYL CHLORIDE WITH FLUOROCARBONS
    41.
    发明申请
    AZEOTROPES OF METHYL CHLORIDE WITH FLUOROCARBONS 有权
    甲基氯化物与氟化物的接枝

    公开(公告)号:US20130158218A1

    公开(公告)日:2013-06-20

    申请号:US13331588

    申请日:2011-12-20

    IPC分类号: C08F2/06 B01J31/02 C09K3/00

    摘要: Azeotropic or azeotrope-like compositions of the present technology include methyl chloride and at least one hydrofluorocarbon or hydrofluoro-olefin. In some examples, the at least one hydrofluorocarbon or hydrofluoro-olefin can be selected from the group consisting of 1,1,1,2-tetrafluoroethane and 1,3,3,3-tetrafluoropropene. The azeotropic or azeotrope-like compositions can be used as solvents or diluents in polymerization processes, including slurry polymerization processes.

    摘要翻译: 本技术的共沸或类共沸组合物包括甲基氯和至少一种氢氟烃或氢氟烯烃。 在一些实例中,至少一种氢氟烃或氢氟烯烃可以选自1,1,1,2-四氟乙烷和1,3,3,3-四氟丙烯。 共沸或类共沸组合物可用作聚合过程中的溶剂或稀释剂,包括淤浆聚合方法。

    HIGH PURITY E-1-CHLORO-3,3,3-TRIFLUOROPROPENE AND METHODS OF MAKING THE SAME
    43.
    发明申请
    HIGH PURITY E-1-CHLORO-3,3,3-TRIFLUOROPROPENE AND METHODS OF MAKING THE SAME 有权
    高纯度E-1-氯代-3,3,3-三氟苯酚及其制备方法

    公开(公告)号:US20120172636A1

    公开(公告)日:2012-07-05

    申请号:US12984024

    申请日:2011-01-04

    IPC分类号: C07C21/18 C07C17/25 C07C17/20

    摘要: The present invention discloses high purity E-1-chloro-3,3,3-trifluoropropene (1233zd(E)) and methods to produce the same. More specifically, the present invention discloses the methods of making 1233zd(E) essentially free of toxic impurities (e.g. 2-chloro-3,3,3-trifluoropropene (1233xf), chlorotetrafluoro-propene (1224), and 3,3,3-trifluoropropyne). The present invention further provides methods for making high purity 1233zd(E) with concentration of 1233xf and 1224 at or below 200 parts per million (ppm) and 3,3,3-trifluoropropyne impurities at or below 20 ppm. Formation of 1233xf impurity can be avoided if pure 1,1,1,3,3-pentachloropropane is used as a starting material. It was also found that formation of 1233xf is avoided if a liquid phase manufacturing process is used.

    摘要翻译: 本发明公开了高纯度E-1-氯-3,3,3-三氟丙烯(1233zd(E))及其制备方法。 更具体地说,本发明公开了制备基本上不含有毒杂质的1233zd(E)的方法(例如2-氯-3,3,3-三氟丙烯(1233xf),氯四氟丙烯(1224)和3,3,3 三氟丙炔)。 本发明还提供了制备浓度为1233xf和1224等于或低于200ppm(ppm)的高纯度1233zd(E)和等于或低于20ppm的3,3,3-三氟丙炔杂质的方法。 如果使用纯1,1,1,3,3-五氯丙烷作为原料,则可以避免形成1233xf杂质。 还发现如果使用液相制造方法,则避免形成1233xf。

    Purification of hydrofluorocarbons
    48.
    发明授权
    Purification of hydrofluorocarbons 失效
    氢氟烃的净化

    公开(公告)号:US06488817B1

    公开(公告)日:2002-12-03

    申请号:US09052757

    申请日:1998-03-31

    IPC分类号: B01D336

    摘要: A process for the purification of difluoromethane comprising: (a) subjecting a mixture comprising at least difluoromethane (HFC-32) and dichlorodifluoromethane (CFC-12) to a first distillation step in which a majority of either CFC-12 or HFC-32 is concentrated in a first distillate and a majority of the other component is concentrated in a first bottoms; and (b) subjecting the first distillate in step (a) to at least one additional second distillation step conducted at a different pressure in which a majority of the component concentrated in said first distillate is concentrated in a second bottoms and in which the other component is concentrated in a second distillate; and (c) recovering purified HFC-32 from one of said first or second bottoms.

    摘要翻译: 一种净化二氟甲烷的方法,包括:(a)使包含至少二氟甲烷(HFC-32)和二氯二氟甲烷(CFC-12)的混合物经历第一蒸馏步骤,其中大部分CFC-12或HFC-32是 浓缩在第一馏出物中,并且大部分其它组分浓缩在第一塔底物中; 和(b)将步骤(a)中的第一馏出物经受至少一个额外的第二蒸馏步骤,其在不同的压力下进行,其中浓缩在所述第一馏出物中的大部分组分集中在第二塔底物中,其中另一组分 集中在第二个馏出物中; 和(c)从所述第一或第二底部之一回收纯化的HFC-32。