Method for purifying tetrafluoropropene
    115.
    发明授权
    Method for purifying tetrafluoropropene 有权
    四氟丙烯的纯化方法

    公开(公告)号:US09302964B2

    公开(公告)日:2016-04-05

    申请号:US14749877

    申请日:2015-06-25

    摘要: To provide a method for efficiently separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and chloromethane (R40) from a composition containing HFO-1234yf and R40. A method for separating HFO-1234yf containing substantially no R40, which comprises bringing an azeotropic composition or azeotrope-like composition of H FO-1234yf and R40 into contact with a specific extraction solvent.

    摘要翻译: 提供从含有HFO-1234yf和R40的组合物有效分离2,3,3,3-四氟丙烯(HFO-1234yf)和氯甲烷(R40)的方法。 一种分离基本上不含R40的HFO-1234yf的方法,其包括使H FO-1234yf和R40的共沸组合物或类共沸组合物与特定的提取溶剂接触。

    Processes for separation of 2,3,3,3-tetrafluoropropene from hydrogen fluoride by azeotropic distillation
    118.
    发明授权
    Processes for separation of 2,3,3,3-tetrafluoropropene from hydrogen fluoride by azeotropic distillation 有权
    通过共沸蒸馏从氟化氢中分离2,3,3,3-四氟丙烯的方法

    公开(公告)号:US08658846B2

    公开(公告)日:2014-02-25

    申请号:US12918137

    申请日:2009-02-19

    申请人: Jeffrey P. Knapp

    发明人: Jeffrey P. Knapp

    摘要: Disclosed herein are processes for separation of 2,3,3,3-tetrafluoropropene and hydrogen fluoride using azeotropic distillation. Additionally, disclosed are processes for separating mixtures of 2,3,3,3-tetrafluoropropene, hydrogen fluoride and 1,1,1,2,3-pentafluoropropane (HFC-245eb) and/or 1,1,1,2,2-pentafluoropropane (HFC-245cb) by azeotropic distillation.

    摘要翻译: 本文公开了使用共沸蒸馏分离2,3,3,3-四氟丙烯和氟化氢的方法。 此外,公开了分离2,3,3,3-四氟丙烯,氟化氢和1,1,1,2,3-五氟丙烷(HFC-245eb)和/或1,1,1,2,2 - 五氟丙烷(HFC-245cb)。

    PURIFICATION OF CIS-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE VIA EXTRACTIVE DISTILLATION
    120.
    发明申请
    PURIFICATION OF CIS-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE VIA EXTRACTIVE DISTILLATION 有权
    通过萃取蒸馏纯化CIS-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE

    公开(公告)号:US20120323054A1

    公开(公告)日:2012-12-20

    申请号:US13315365

    申请日:2011-12-09

    申请人: Jeffrey P. Knapp

    发明人: Jeffrey P. Knapp

    IPC分类号: C07C17/383

    摘要: A process for separating cis-1,1,1,4,4,4-hexafluoro-2-butene from a first mixture comprising cis-1,1,1,4,4,4-hexafluoro-2-butene and at least one chlorofluoroolefin is disclosed. The process involves the steps of contacting said first mixture with at least one extractive agent, to form a second mixture, distilling said second mixture; and recovering cis-1,1,1,4,4,4-hexafluoro-2-butene substantially free of chlorofluoroolefin.

    摘要翻译: 从顺式-1,1,1,4,4,4-六氟-2-丁烯和至少包含顺式-1,1,1,4,4,4-六氟-2-丁烯的第一混合物中分离顺式-1,1,1,4,4,4-六氟-2-丁烯的方法 公开了一种氟氯烯烃。 该方法包括使所述第一混合物与至少一种萃取剂接触以形成第二混合物,蒸馏所述第二混合物的步骤; 并回收基本上不含氯氟烯烃的顺式-1,1,1,4,4,4-六氟-2-丁烯。