Title:
METHOD FOR PRODUCING FLUOROHALOGENATED HYDROCARBON
Document Type and Number:
WIPO Patent Application WO/2018/143271
Kind Code:
A1
Abstract:
The present invention provides a method for producing a fluorohalogenated hydrocarbon comprising a step in which the outlet gas of a fluorination reactor is compressed by a compressor, wherein the production method is used to avoid that the hydrogen fluoride contained in the outlet gas condenses during compression, and to obtain a target compound in a stable manner. The present invention provides a method for producing a fluorohalogenated hydrocarbon, comprising a step in which a reaction is brought about between a chlorine-containing compound and gaseous-phase hydrogen fluoride, wherein said production method is characterized in that: included is a separation step in which a reaction product containing hydrogen fluoride, hydrogen chloride, and organic matter that includes the fluorohalogenated hydrocarbon is separated into a plurality of components; the fluorohalogenated hydrocarbon is at least one species selected from the group consisting of 1,1,1,2,2-pentafluoropropane (HFC-245cb), 1,1,1,3,3-pentafluoropropane (HFC-245fa), E,Z-1,3,3,3-tetrafluoropropene (E,Z-HFO-1234ze), 2,3,3,3-tetrafluoropropene (HFO-1234yf), 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf), and 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd); the separation step has (1) step 1 for separating the reaction product into a gas phase and a liquid phase, (2) step 2 for elevating the pressure of the liquid phase and supplying the liquid phase to a distillation column A, (3) step 3 for compressing the gas phase and supplying the gas phase to the distillation column A, and (4) step 4 for fractionating a first stream including the hydrogen chloride from the top of the distillation column A, and fractionating a second stream including the organic matter and the hydrogen fluoride from the bottom of the distillation column A; and (5) in step 3, when the gas phase is compressed, the gas phase is compressed in series in two or more stages using a compressor, and the gas fraction of the post-compression gas at each stage is kept at 1 by heating with a heater.
Inventors:
TAKAHASHI KAZUHIRO (JP)
TAKAKUWA TATSUYA (JP)
TAKAKUWA TATSUYA (JP)
Application Number:
PCT/JP2018/003213
Publication Date:
August 09, 2018
Filing Date:
January 31, 2018
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
C07C17/38; C07C17/383; C07C19/08; C07C21/18
Domestic Patent References:
| WO2013141409A1 | 2013-09-26 | |||
| WO2013111911A1 | 2013-08-01 | |||
| WO2007079431A2 | 2007-07-12 | |||
| WO2013114015A1 | 2013-08-08 |
Foreign References:
| JP2015511230A | 2015-04-16 | |||
| JP2009538887A | 2009-11-12 | |||
| JPH05146680A | 1993-06-15 | |||
| JPH11171806A | 1999-06-29 |
Other References:
TAMURA, KOHJI: "Hydrofluoric acid (HF", YUKI GOSEI KAGAKU KYOKAI SHI = JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY, vol. 43, no. 12, 3 April 1985 (1985-04-03), pages 1167 - 1168, XP009515717, DOI: 10.5059/yukigoseikyokaishi.43.1167
See also references of EP 3578536A4
See also references of EP 3578536A4
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
Download PDF:
Previous Patent: BASE STATION DEVICE, CACHE DEVICE, AND COMMUNICATION SYSTEM
Next Patent: PNEUMATIC TIRE
Next Patent: PNEUMATIC TIRE