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US-20260125589-A1 - COMPOSITION CONTAINING TRANS-1,2-DIFLUOROETHYLENE

US20260125589A1US 20260125589 A1US20260125589 A1US 20260125589A1US-20260125589-A1

Abstract

The disclosure provides a novel composition comprising trans-1,2-difluoroethylene. The disclosure provides the following: a composition comprising trans-1,2-difluoroethylene (HFO-1132(E)) and at least one additional compound; the composition that is an azeotropic or azeotrope-like composition; and use of the composition as a heat transfer medium, a foaming agent, or a propellant.

Inventors

  • Kazuhiro Takahashi

Assignees

  • DAIKIN INDUSTRIES, LTD.

Dates

Publication Date
20260507
Application Date
20251229
Priority Date
20190111

Claims (6)

  1. 1 . A composition comprising trans-1,2-difluoroethylene (HFO-1132(E)), and an additional compound, wherein the additional compound is selected from the group consisting of 1-chloro-1,1,2-trifluoroethane (HCFC-133), 2-chloro-1,1,1-trifluoroethane (HCFC-133b), 1,1-dichloro-2,2,2-trifluoroethane (HCFC-123), 1,2-difluoroethane (HFC-152), 1,1,2-trifluoroethane (HFC-143), fluoromethane (HFC-41), chlorodifluoromethane (HCFC-22), ethylene, acetylene, 1-chloro-1,2-difluoroethane (HCFC-142a), fluoroethylene (HFO-1141), 1,1-difluoroethylene (HFO-1132a), and 1-chloro-2,2-difluoroethylene (HCFO-1122).
  2. 2 . The composition according to claim 1 , wherein a total amount of the additional compound is 10 mass % or less based on the total amount of the HFO-1132(E) and the additional compound, defined as 100 mass %.
  3. 3 . The composition according to claim 1 , wherein a total amount of the additional compound is 1 mass % or less based on the total amount of the HFO-1132(E) and the additional compound, defined as 100 mass %.
  4. 4 . A composition comprising trans-1,2-difluoroethylene (HFO-1132(E)), and an additional compound, wherein the additional compound is selected from the group consisting of cis-1,2-difluoroethylene (HFO-1132(Z)), 1-chloro-1,1,2-trifluoroethane (HCFC-133), 2-chloro-1,1,1-trifluoroethane (HCFC-133b), 1,1-dichloro-2,2,2-trifluoroethane (HCFC-123), 1,1-difluoroethane (HFC-152a), 1,2-difluoroethane (HFC-152), fluoroethane (HFC-161), 1,1,1-trifluoroethane (HFC-143a), 1,1,2-trifluoroethane (HFC-143), 1,1,1,2-tetrafluoroethane (HFC-134a), difluoromethane (HFC-32), pentafluoroethane (HFC-125), fluoromethane (HFC-41), chlorodifluoromethane (HCFC-22), ethylene, propylene, acetylene, 1-chloro-1,2-difluoroethane (HCFC-142a), 3,3,3-trifluoropropene (HFO-1243zf), 2,3,3,3-tetrafluoropropene (HFO-1234yf), 1,3,3,3-tetrafluoropropene (HFO-1234ze), 1,2,3,3,3-pentafluoropropene (HFO-1225ye), fluoroethylene (HFO-1141), 1,1-difluoroethylene (HFO-1132a), 1-chloro-2,2-difluoroethylene (HCFO-1122), and 1-chloro-1,2-difluoroethylene (HCFO-1122a), and wherein a total amount of the additional compound is less than 1 mass % based on the total amount of the HFO-1132(E) and the additional compound, defined as 100 mass %.
  5. 5 . The composition according to claim 1 , which is an azeotropic or azeotrope-like composition.
  6. 6 . (canceled)

Description

This application is a Continuation of U.S. application Ser. No. 17/370,630, filed Jul. 8, 2021, which is a Bypass Continuation of PCT application PCT/JP2020/000594, filed Jan. 10, 2020. This application also claims the benefit of the earlier filing date of Japanese patent application 2019-003475, filed Jan. 11, 2019. TECHNICAL FIELD The present disclosure relates to a composition that comprises trans-1,2-difluoroethylene. BACKGROUND ART Patent Literature (PTL) 1 discloses compositions that comprise trans-1,2-difluoroethylene, for use in refrigeration, air-conditioning, and heat pump systems. PTL 2 discloses working media for heat cycles comprising 1,2-difluoroethylene. CITATION LIST Patent Literature PTL 1: U.S. Patent Publication No. 2011/0253927PTL 2: WO2012/157765 SUMMARY Solution to Problem Item 1. A composition comprising trans-1,2-difluoroethylene (HFO-1132(E)) and an additional compound, the additional compound being at least one member selected from the group consisting of 1-chloro-1,1,2-trifluoroethane (HCFC-133), 2-chloro-1,1,1-trifluoroethane (HCFC-133b), 1,1-dichloro-2,2,2-trifluoroethane (HCFC-123), 1,2-difluoroethane (HFC-152), 1,1,2-trifluoroethane (HFC-143), fluoromethane (HFC-41), chlorodifluoromethane (HCFC-22), ethylene, acetylene, 1-chloro-1,2-difluoroethane (HCFC-142a), 1,1,2-trifluoroethylene (HFO-1123), fluoroethylene (HFO-1141), 1,1-difluoroethylene (HFO-1132a), and 1-chloro-2,2-difluoroethylene (HCFO-1122). Advantageous Effects The present disclosure provides a novel composition that comprises trans-1,2-difluoroethylene. DESCRIPTION OF EMBODIMENTS Definition of Terms In the present specification, the term “refrigerant” includes at least compounds that are specified in ISO 817 (International Organization for Standardization), and that are given a refrigerant number (ASHRAE number) representing the type of refrigerant with “R” at the beginning; and further includes refrigerants that have properties equivalent to those of such refrigerants, even though a refrigerant number is not yet given. Refrigerants are broadly divided into fluorocarbon compounds and non-fluorocarbon compounds in terms of the structure of the compounds. Fluorocarbon compounds include hydrofluoroolefins (HFO), hydrochlorofluoroolefins (HCFO), chlorofluorocarbons (CFC), hydrochlorofluorocarbons (HCFC), and hydrofluorocarbons (HFC). Non-fluorocarbon compounds include propane (R290), propylene (R1270), butane (R600), isobutane (R600a), carbon dioxide (R744), and ammonia (R717). In the present specification, the phrase “composition comprising a refrigerant” at least includes (1) a refrigerant itself (including a mixture of refrigerants), (2) a composition that further comprises other components and that can be mixed with at least a refrigeration oil to obtain a working fluid for a refrigerating machine, and (3) a working fluid for a refrigerating machine containing a refrigeration oil. In the present specification, of these three embodiments, the composition (2) is referred to as a “refrigerant composition” so as to distinguish it from a refrigerant itself (including a mixture of refrigerants). Further, the working fluid for a refrigerating machine (3) is referred to as a “refrigeration oil-containing working fluid” so as to distinguish it from the “refrigerant composition.” In the present specification, the term “azeotrope-like composition” refers to a composition that can be treated substantially as an azeotropic composition. More specifically, the term “azeotrope-like composition” as used herein refers to a constant boiling mixture or a substantially constant boiling mixture of two or more substances that behave substantially as a single substance. One of the characteristics of azeotrope-like compositions is that the formulation of vapor generated by evaporation or distillation of the liquid substantially does not undergo a change from the formulation of the liquid. That is, in the present specification, a mixture that boils, distills, or refluxes without substantial change in formulation is referred to as an “azeotrope-like composition.” More specifically, in the present disclosure, a composition is defined as an azeotrope-like composition when the difference between the bubble point vapor pressure of the composition and the dew point vapor pressure of the composition at a specific temperature is 3% or less (based on the bubble point pressure). In the present specification, when the term “alternative” is used in a context in which the first refrigerant is replaced with the second refrigerant, the first type of “alternative” means that equipment designed for operation using the first refrigerant can be operated using the second refrigerant under optimum conditions, optionally with changes of only a few parts (at least one of the following: refrigeration oil, gasket, packing, expansion valve, dryer, and other parts) and equipment adjustment. In other words, this type of alternative means that the same equipment is ope