Claims
- 1. A reactive agent for decomposing fluorine compounds, consisting essentially of alumina, a carbonate of magnesium, calcium, strontium or barium, and at least one oxide of a metal selected from the group consisting of copper and tin, wherein the carbonate and oxide are in powder form.
- 2. The reactive agent for decomposing fluorine compounds as claimed in claim 1, wherein said alumina has a specific surface area of 50 m2/g or more.
- 3. The reactive agent for decomposing fluorine compounds as claimed in claim 1 or 2, wherein said alumina is pseudo boehmite alumina.
- 4. The reactive agent for decomposing fluorine compounds as claimed in claim 1 or 2, wherein said alumina is obtained by baking pseudo boehmite alumina at a baking temperature of from 400 to 1,000° C.
- 5. The reactive agent for decomposing fluorine compounds as claimed in claim 1 or 2, wherein the alumina and the carbonate present in said reactive agent each is in the form of powder having a particle size of 100 μm or less.
- 6. The reactive agent for decomposing fluorine compounds as claimed in claim 1 or 2, wherein the alumina and the carbonate are present in said reactive agent at a mass ratio of from 1:9 to 1:1.
- 7. The reactive agent for decomposing fluorine compounds as claimed in claim 1 or 2, wherein the content of said metal oxide is from 1:99 to 5:95 in terms of a ratio to the total mass of said alumina and said carbonate of magnesium, calcium, strontium or barium.
- 8. The reactive agent for decomposing fluorine compounds as claimed in claim 1 or 2, which has an alkali metal content of 0.1 mass % or less.
- 9. The reactive agent for decomposing fluorine compounds as claimed in claim 1 or 2, which is a granular product obtained by baking at a temperature of from 400 to 700° C.
- 10. The reactive agent for decomposing fluorine compounds as claimed in claim 9, which is a granular product having a particle size of from 0.5 to 10 mm.
- 11. The reactive agent for decomposing fluorine compounds as claimed in claim 1 or 2, which has a water content of 1 mass % or less.
- 12. The reactive agent for decomposing fluorine compounds as claimed in claim 1, wherein said carbonate is calcium carbonate.
Priority Claims (3)
Number |
Date |
Country |
Kind |
11-310509 |
Nov 1999 |
JP |
|
11-122728 |
Apr 1999 |
JP |
|
2000-062430 |
Mar 2000 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
This application is an application filed under 35 U.S.C. §111(a) claiming benefit pursuant to 35 U.S.C. §119(e)(1) of the filing date of the Provisional Application No. 60/156,871 filed Sep. 30, 1999 pursuant to 35 U.S.C. §111(b).
US Referenced Citations (19)
Foreign Referenced Citations (5)
Number |
Date |
Country |
7-132211 |
May 1995 |
JP |
10-277363 |
Oct 1998 |
JP |
10-286438 |
Oct 1998 |
JP |
10-286439 |
Oct 1998 |
JP |
11-70322 |
Mar 1999 |
JP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/156871 |
Sep 1999 |
US |