申请人:Arkema France
公开号:US10479746B2
公开(公告)日:2019-11-19
The present invention concerns a method for purifying 2,3,3,3-tetrafluoro-1-propene (1234yf) from a first composition comprising 2,3,3,3-tetrafluoro-1-propene and at least one of the compounds chosen from the group consisting of 1,1-difluoroethane (152a), chloropentafluoroethane (115), and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E) said method comprising the steps consisting of: a) bringing said first composition into contact with at least one organic extractant in order to form a second composition; b) extractive distillation of said second composition in order to form (i) a third composition comprising said organic extractant and said at least one of the compounds chosen from the group consisting of 1,1-difluoroethane (152a) chloropentafluoroethane (115), and trans-1,3,3,3-tetrafluoro-1-propene (1234ze-E); and ii) a stream comprising 2,3,3,3-tetrafluoro-1-propene. The invention also concerns a method for producing and purifying 2,3,3,3-tetrafluoro-1-propene.
本发明涉及一种从第一种组合物中提纯2,3,3,3-四氟-1-丙烯(1234yf)的方法,该第一种组合物包括2,3,3,3-四氟-1-丙烯和至少一种选自1,1-二氟乙烷(152a)、氯五氟乙烷(115)和反式-1,3,3,3-四氟-1-丙烯(1234ze-E)的化合物,所述方法包括以下步骤:a) 将所述第一种成分与至少一种有机萃取剂接触,以形成第二种成分;b) 对所述第二种组合物进行萃取蒸馏,以形成 (i) 第三种组合物,该第三种组合物包含所述有机萃取剂和所述至少一种选自 1,1-二氟乙烷(152a)、氯五氟乙烷(115)和反式-1,3,3,3-四氟-1-丙烯(1234ze-E)组成的组的化合物;以及 (ii) 包含 2,3,3,3-四氟-1-丙烯的液流。本发明还涉及一种生产和提纯 2,3,3,3-四氟-1-丙烯的方法。