Refrigerant composition containing hydrofluoropropene with low-global warming potential
AssigneeDaikin Industries, Ltd.
InventorsTatsumi TSUCHIYA, Takashi SHIBANUMA, Yasufu YAMADA, Hitomi ARIMOTO
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Abstract
The present invention provides a stabilized refrigerant composition containing a hydrofluoropropene with low global warming potential (GWP) that can remain stable even in the presence of air (oxygen) for a long period of time. More specifically, the present invention provides a refrigerant composition containing a hydrofluoropropene and a stabilizer. The stabilizer is at least one member selected from the group consisting of alkylcatechols, alkoxyphenols, benzoquinones, phenothiazines, and phthalates.
Claims9
A refrigerant composition comprising a hydrofluoropropene and a stabilizer, the stabilizer being phthalates.
A method for stabilizing a refrigerant composition containing a hydrofluoropropene, the method comprising adding to the refrigerant composition phthalates.
A method for evaluating a refrigerant composition comprising a hydrofluoropropene and a stabilizer, the method comprising heat-treating the refrigerant composition in the presence or absence of oxygen in an airtight container, and determining the acid content of the refrigerant composition after the treatment.
A method for evaluating a refrigerant composition comprising hydrofluoropropene, a lubricant, and a stabilizer, the method comprising heat-treating the refrigerant composition in the presence or absence of oxygen in an airtight container, and then determining the acid content of the refrigerant composition, and/or the total acid value of the lubricant contained in the heat-treated refrigerant composition.
Dependencies are inferred from the claim text.