Compositions of 2,4,4,4-tetrafluorobut-1-ene and 1-methoxyheptafluoropropane

Abstract

The use of a composition comprising 2,4,4,4-tetra-fluoro-but-1-ene and 1-methoxyheptafluoropropane as a heat transfer fluid. A heat-transfer composition including: a heat-transfer fluid including 2,4,4,4-tetrafluorobut-1-ene and 1-methoxyheptafluoropropane; and one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof. A heat-transfer installation including a vapor compression circuit containing a composition as mentioned.

1 . The use of a composition comprising 2,4,4,4-tetrafluorobut-1-ene and 1-methoxyheptafluoropropane as a heat-transfer fluid. 
     
     
         2 . The use as claimed in  claim 1 , in which the composition comprises from 1% to 99% of 2,4,4,4-tetrafluorobut-1-ene and from 1% to 99% of 1-methoxyheptafluoropropane. 
     
     
         3 . The use as claimed in  claim 1 , in which the composition consists of a mixture of 2,4,4,4-tetrafluorobut-1-ene and 1-methoxyheptafluoropropane. 
     
     
         4 . The use as claimed in  claim 1 , in which the composition is quasi-azeotropic. 
     
     
         5 . The use as claimed in  claim 1 , in which the composition is non-flammable. 
     
     
         6 . A heat-transfer composition comprising:
 a heat-transfer fluid comprising 2,4,4,4-tetrafluorobut-1-ene and 1-methoxyheptafluoropropane; and   one or more additives chosen from lubricants, stabilizers, surfactants, tracers, fluorescers, odorous agents and solubilizers, and mixtures thereof.   
     
     
         7 . The heat-transfer composition as claimed in  claim 6 , in which the heat-transfer fluid comprises from 1% to 99% of 2,4,4,4-tetrafluorobut-1-ene and from 1% to 99% of 1-methoxyheptafluoropropane. 
     
     
         8 . The heat-transfer composition as claimed in  claim 6 , in which the heat-transfer fluid consists of a mixture of 2,4,4,4-tetrafluorobut-1-ene and 1-methoxyheptafluoropropane. 
     
     
         9 . The heat-transfer composition as claimed in  claim 6 , in which the heat-transfer fluid is quasi-azeotropic; and/or in which the heat-transfer fluid is non-flammable. 
     
     
         10 . A heat-transfer installation comprising a vapor compression circuit containing a heat-transfer composition as claimed in  claim 6 . 
     
     
         11 . The installation as claimed in  claim 10 , which is chosen from mobile or stationary heat-pump heating, air-conditioning, and especially motor vehicle air-conditioning or centralized stationary air-conditioning, refrigeration, freezing and Rankine cycle installations. 
     
     
         12 . A process for heating or cooling the fluid or a body by means of a vapor compression circuit containing a heat-transfer fluid, said process successively comprising evaporation of the heat-transfer fluid, compression of the heat-transfer fluid, condensation of the heat fluid and depressurization of the heat-transfer fluid, in which the heat-transfer fluid is a composition as in  claim 1 . 
     
     
         13 . A process for reducing the environmental impact of a heat-transfer installation comprising a vapor compression circuit containing an initial heat-transfer fluid, said process comprising a step of replacing the initial heat-transfer fluid in the vapor compression circuit with a final transfer fluid, the final transfer fluid having a lower GWP than the initial heat-transfer fluid, in which the final heat-transfer fluid is a composition as in  claim 1 . 
     
     
         14 . A composition comprising from 1% to 99% of 2,4,4,4-tetrafluorobut-1-ene and from 1% to 99% of 1-methoxyheptafluoropropane. 
     
     
         15 . The composition as claimed in  claim 14 , consisting of a mixture of 2,4,4,4-tetrafluorobut-1-ene and 1-methoxyheptafluoropropane. 
     
     
         16 . The composition as claimed in  claim 14 , which is quasi-azeotropic. 
     
     
         17 . The composition as claimed in  claim 14 , which is non-flammable.