Method for manufacturing filled container, and filled container

Patent metadata

Field	Value
Publication number	US-11519557-B2
Application number	US-201816625963-A
Country	US
Kind code	B2
Filing date	Jul 24, 2018
Priority date	Aug 1, 2017
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

The method for producing a filled container of the present invention includes: providing a metal storage container, at least an inner surface of which is formed of a manganese steel and in which the inner surface has a surface roughness R max of 10 μm or less; performing fluorination by bringing the inner surface of the storage container into contact with a gas containing at least one first fluorine-containing gas selected from the group consisting of ClF 3 , IF 7 , BrF 5 , F 2 , and WF 6 at 50° C. or lower; purging the inside of the storage container with an inert gas; and filling the inside of the storage container with at least one second fluorine-containing gas selected from the group consisting of ClF 3 , IF 7 , BrF 5 , F 2 , and WF 6 .

First claim

The invention claimed is:

1. A method for producing a filled container, comprising:
providing a metal storage container, at least an inner surface of which is formed of a manganese steel and in which the inner surface has a surface roughness R max of 10 μm or less;
performing fluorination by bringing the inner surface of the storage container into contact with a gas containing at least one first fluorine-containing gas selected from the group consisting of ClF 3 , IF 7 , BrF 5 , F 2 , and WF 6 at 50° C. or lower;
purging the inside of the storage container with an inert gas; and
filling the inside of the storage container with at least one second fluorine-containing gas selected from the group consisting of ClF 3 , IF 7 , BrF 5 , F 2 , and WF 6 .

2. The method for producing a filled container according to claim 1 ,
wherein the first fluorine-containing gas is F 2 gas.

3. The method for producing a filled container according to claim 1 ,
wherein the second fluorine-containing gas is ClF 3 gas or IF 7 gas.

4. The method for producing a filled container according to claim 1 ,
wherein the surface roughness R max of the inner surface of the storage container is 1 μm or less.

5. The method for producing a filled container according to claim 1 ,
wherein the manganese steel contains 97% by mass or more iron.

6. The method for producing a filled container according to claim 1 ,
wherein the first fluorine-containing gas is F 2 gas, and the second fluorine-containing gas is ClF 3 gas or IF 7 gas.

7. The method for producing a filled container according to claim 1 ,
wherein the first fluorine-containing gas is F 2 gas, and the second fluorine-containing gas is WF 6 gas.

8. The method for producing a filled container according to claim 1 ,
wherein the first fluorine-containing gas is ClF 3 gas, and the second fluorine-containing gas is ClF 3 gas.

9. A filled container comprising:
a metal storage container; and
at least one fluorine-containing gas selected from the group consisting of ClF 3 , IF 7 , BrF 5 , F 2 , and WF 6 , filling the storage container,
wherein at least an inner surface of the storage container is formed of a manganese steel,
the inner surface has a surface roughness R max of 10 μm or less, and
a surface that contacts the fluorine-containing gas inside the storage container has a mole ratio F/Fe of a fluorine atom F to an iron atom Fe of 0.01 or more and less than 3 and a mole ratio O/Fe of an oxygen atom O to the iron atom Fe of 1 or less, each on average within 10 nm from an outermost surface.

10. The filled container according to claim 9 ,
wherein the amount of a metal element contained in a metallic impurity in the fluorine-containing gas taken out from the filled container is less than 10 ppb by mass.

11. The filled container according to claim 9 ,
wherein the mole ratio F/Fe is 0.1 or more and 2.5 or less.

12. The filled container according to claim 6 ,
wherein the fluorine-containing gas is ClF 3 gas or IF 7 gas.

13. The filled container according to claim 9 ,
wherein the surface roughness R max of the inner surface of the storage container is 1 μm or less.

14. The filled container according to claim 9 ,
wherein the manganese steel contains 97% by mass or more iron.

15. The filled container according to claim 9 ,
wherein the fluorine-containing gas is WF 6 gas.

Assignees

• Central Glass Co Ltd

Inventors

• Yao Akifumi
• Nagatomo Masakiyo
• Ikeda Shinya

Classifications

• F17C2209/232

  of walls · CPC title

• C23C8/08

  only one element being applied · CPC title

• F17C2221/03

  Mixtures · CPC title

• F17C2203/0639

  Steels · CPC title

• F17C2221/037

  Containing pollutant, e.g. H2S, Cl · CPC title