METHOD OF RECOVERING PENTAFLUOROETHANE FORM MIXTURE WITH CHLOROPENTAFLUOROETHANE Russian patent published in 1998 - IPC

Abstract RU 2121993 C1

FIELD: chemical industry. SUBSTANCE: invention discloses method of effective separation of pentafluoroethane (HFC-125) used as cooling agent, rocket fuel from mixture of HFC and chloropentafluoroethane (CFC-115). The method comprises subjecting mixture of HFC-125 and CFC-115 to extractive distillation so as to obtain concentrated HFC- 125. Methanol, ethanol, butanol, propyl alcohol, pentafluoropropanol, tetrafluoropropanol or acetone are used as extracting agent to produce CFC-115 as distillation product, and mixture of HFC-125 and extracting agent are formed as residual product. The extracting agent is then separated from HFC-125 by distillation of mixture and is used for second time in extractive distillation. The method is simple to be put into practice. EFFECT: more efficient recovery method. 14 cl, 1 ex, 2 dwg, 3 tbl

Similar patents RU2121993C1

Title Year Author Number
PENTAFLUOROETHANE ISOLATION METHOD (VERSIONS) 1995
  • Satoru Kokhno
  • Takasi Sibanuma
RU2131407C1
METHOD OF ISOLATION OF PENTAFLUOROETHANE FROM A MIXTURE WITH CHLOROPENTAFLUOROETHANE 1991
  • Feliks Vinsl Martinez[Us]
RU2101271C1
METHOD FOR SYNTHESIS OF HEXAFLUOROBUTADIENE 2018
  • Takahashi, Kazuhiro
  • Ohhigashi, Yuuko
  • Iyota, Junpei
RU2754857C1
METHOD FOR PRODUCING 1,1,1,2,2-PENTAFLUORETHANE 2003
  • Nappa Mario Dzh.
  • Rao Vellijur Nott Mallikardzhuna
  • Rozenfel'D Kh. Dehvid
  • Subramani Shekkhar
  • Subramanian Munirpallam A.
  • Sivert Allen K.
RU2328482C2
METHOD OF PRODUCING FLUOROAMIDE AND FLUORONITRILE 2008
  • Jamauti Akiesi
  • Mokhara Kensuke
  • Takao Keiko
  • Kokh Meiten
RU2440975C2
METHOD FOR CONVERSION OF HYDROFLUOROCARBONS WITH SATURATED LINEAR C-C CHAIN 2003
  • Iikubo Juiti
  • Khedrik Viki
  • Brehndstadter Stefan M.
  • Kon Mitchel
RU2320632C2
SELECTIVELY REACTING OLEFINS CONTAINING TERMINAL CF GROUP IN MIXTURE 2006
  • Nappa Mario Dzhozef
  • Sivert Allen Kapron
  • Cherstkov Viktor Filippovich
  • Deljagina Nina Ivanovna
RU2399607C2
METHOD OF SEPARATING FLUOROLEFINS FROM FLUOROHYDROGEN BY AZEOTROPIC DISTILLATION 2007
  • Knehpp Dzheffri P.
  • Maler Barri Asher
  • Toton Donal'D Dzh.
RU2466979C2
HALOGEN-CONTAINING POLYETHER 1992
  • Ekhnosuke Okhsaka[Jp]
  • Takasi Tokhzuka[Jp]
  • Sodzi Takaki[Jp]
RU2107074C1
FLUORINATED HYDROCARBONS, METHODS OF PREPARATION THEREOF, GREASE FOR REFRIGERATING MACHINES, AND GREASE FOR MAGNETIC RECORDING SYSTEM 1994
  • Satosi Ide
  • Katsuki Fudzivara
  • Masajuki Jamana
  • Jositaka Khonda
  • Ikuo Jamamoto
  • Fumikhiko Jamaguti
  • Ehjdzi Seki
  • Tatsuja Otsuka
  • Satosi Isida
RU2145592C1

RU 2 121 993 C1

Authors

Satoru Kokhno

Takasi Sibanuma

Dates

1998-11-20Published

1995-05-08Filed