Method for storing 1,1,1,2,3,3-hexafluoropropane and container for storing same

Patent metadata

Field	Value
Publication number	US-11198663-B2
Application number	US-201816625811-A
Country	US
Kind code	B2
Filing date	Jul 16, 2018
Priority date	Jul 17, 2017
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

The present invention relates to a method for storing, in a closed container, a composition comprising 1,1,1,2,3,3-hexafluoropropane in a liquid/gas state composed of a liquid phase and of a gas phase, characterized in that i) a stream comprising 1,1,1,2,3,3-hexafluoropropane is injected into said container, said stream comprising an oxygen concentration of at most 5000 ppm by volume at a temperature of 25° C., and ii) the container is closed after injection of said stream. The present invention also relates to a container for storing 1,1,1,2,3,3-hexafluoropropane.

First claim

The invention claimed is:

1. A method for storing, in a closed container, a composition composed of a liquid phase and a gas phase, the composition comprising 1,1,1,2,3,3-hexafluoropropane, the method comprising
i. injecting a stream comprising 1,1,1,2,3,3-hexafluoropropane into said container, said stream comprising an oxygen concentration of at most 5000 ppm by volume at a temperature of 25° C., and
ii. closing the container after injection of said stream.

2. The method as claimed in claim 1 , wherein the oxygen concentration is at most 100 ppm by volume at a temperature of 25° C.

3. The method as claimed in claim 1 , wherein, after closing the container, the liquid phase comprises compound A in a content by weight of less than 500 ppm, based on the total weight of said liquid phase; and wherein compound A comprises a group of formula (I), —[—C(CX 3 )(X)—C(X) 2 ] n — (I), with each X independently selected from the group consisting of H and F, and n being an integer of between 2 and 100.

4. A closed container for storing a composition composed of a liquid phase and a gas phase, the composition comprising 1,1,1,2,3,3-hexafluoropropane and oxygen, wherein an oxygen concentration in said gas phase is at most 5000 ppm by volume at a temperature of 25° C.

5. The container as claimed in claim 4 , wherein the oxygen concentration in said gas phase is at most 100 ppm by volume at a temperature of 25° C.

6. The container as claimed in claim 4 , wherein the liquid phase comprises compound A in a content by weight less than 5000 ppm, based on the total weight of said liquid phase; and wherein compound A comprises a group of formula (I), —[—C(CX 3 )(X)—C(X) 2 ] n — (I), with each X independently selected from the group consisting of H and F, and n being an integer of between 2 and 100.

7. The container as claimed in claim 4 , wherein the container withstands a test pressure, said test pressure being of between 10 and 100 bar.

8. The container as claimed in claim 4 , wherein the container is made of a material selected from the group consisting of carbon steel, stainless steel, manganese steel, chromium/molybdenum steel and an aluminum alloy.

9. The container as claimed in claim 4 , wherein the container comprises an internal surface in contact with said composition, said internal surface being at least partially covered with a coating comprising zinc or with a resin of polyether or polyol.

10. The container as claimed in claim 4 , wherein said composition comprises at least 98% by weight of 1,1,1,2,3,3-hexafluoropropane, based on the total weight of the composition.

Assignees

• Arkema France

Inventors

• Deur-Bert Dominique
• Wendlinger Laurent

Classifications

• F17C2203/0646

  Aluminium · CPC title

• F17C2203/0641

  Non-magnetic steels · CPC title

• C07C19/08

  containing fluorine · CPC title

• F17C2203/0604

  Liners · CPC title

• B65D90/02

  Wall construction · CPC title