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US 9,428,430 B2Granted
Method for storing tetrafluoropropene and container for storing tetrafluoropropene
AssigneeAsahi Glass Company, Limited
InventorsMasato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
Life of this patent
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Abstract
To provide a method for stably storing tetrafluoropropene filled in a container for e.g. storage or transportation, without occurrence of reaction such as polymerization. A method for storing tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container, wherein the oxygen concentration (content) in the above gas phase is adjusted to at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.
Claims8
A method for storing tetrafluoropropene, the method comprising:
- sealing the tetrafluoropropene in a gaseous-liquid state composed of a gas phase and a liquid phase in a closed container,
- wherein an oxygen concentration in the gas phase is at least 3 vol ppm and less than 3,000 vol ppm at a temperature of 25° C.
Dependencies are inferred from the claim text.