Back to results
US 9,809,516 B2Granted
Method for storing tetrafluoropropene and container for storing tetrafluoropropene
AssigneeAsahi Glass Company, Limited
InventorsMasato Fukushima, Masaaki Tsuzaki, Maki Shigematsu
Life of this patent
Estimating the term…
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.
Claims4
A closed container, containing tetrafluoropropene in a gaseous-liquid state comprising a gas phase and a liquid phase,
- 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., and
- the tetrafluoropropene comprises at least one compound selected from the group consisting of trans-1,3,3,3-tetrafluoropropene, cis-1,3,3,3-tetrafluoropropene, trans-1,2,3,3-tetrafluoropropene, cis-1,2,3,3-tetrafluoropropene, 1, 1,3,3-tetrafluoropropene, 1, 1,2,3-tetrafluoropropene, and 2,3,3,3-tetrafluoropropene.
Dependencies are inferred from the claim text.