Patent US5206003A successfully refreshed from Google Patents.
US5206003A
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US
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Method of decomposing flow
Assignee: Metawater Co Ltd
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Filing: 1991-12-09
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Granted: 1993-04-27
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Expires: 2011-12-09
Abstract
Abstract An excellent method of decomposing flon is provided which can decompose flon economically with high decomposition efficiency without necessitating high temperature and high pressure by contacting a gas containing a flon with a catalyst at a condition of a temperature of not less than 200 DEG C. and space velocity of not over than 50,000 (hr-1).
Inventors
- 👤 Yoshinori Imoto
- 👤 Katsunosuke Hara
- 👤 Masakatsu Hiraoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8659; B01D53/8662
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
A method of decomposing flon, comprising contacting a gas containing flon with a catalyst at a temperature of 200-700° C. and a space velocity of 2,000 to 50,000 (hr -1 ), the catalyst being selected from the group consisting of Rh, Pd, Mn, and Cu and an oxide or oxides thereof.
Claim 2
Independent Claim
51 words
A method of decomposing flon, comprising contacting a gas containing flon with a catalyst at a temperature of 200-700° C. and a space velocity of 2,000 to 50,000 (hr -1 ), the catalyst being selected from the group consisting of Rh, Pd, Mn, and Cu and an oxide or oxides thereof.
Claim 3
Dependent Claim
39 words
The method of claim 1, wherein the catalyst uses a carrier of an integral honeycomb type structural body having an equivalent diameter of throughholes of 30 mm or less and an open porosity of not less than 50% .
Claim 4
Dependent Claim
11 words
The method of claim 1, wherein the temperature is 400-600° C.
Claim 5
Dependent Claim
14 words
The method of claim 1, wherein the space velocity is 2,000-20,000 (hr -1 ).
Claim 6
Dependent Claim
43 words
The method of claim 1, wherein the catalyst uses a carrier of a specific surface area of at least 10 m 2 /g selected from the group consisting of ZrO 2 -TiO 2 and ZrO 2 -TiO 2 -Al 2 O 3 .
Claim 7
Independent Claim
109 words
A method of decomposing flon, comprising contracting a gas containing flon with a catalyst at a temperature of 200-700° C. and a space velocity of 2,000-50,000 (hr -1 ), the catalyst consisting of components A and B, the component A being a single oxide of a metal selected from the group consisting of Zr, Ti, and W or a complexed multi oxide of at least two metals selected from the group consisting of Zr, Ti, Al, W and Si, and the component B being a metal or metals selected from the group consisting of Pt, Rh, Pd, Ru, Mn, Cu, Cr, and Fe, and an oxide or oxides thereof.
Claim 8
Independent Claim
109 words
A method of decomposing flon, comprising contracting a gas containing flon with a catalyst at a temperature of 200-700° C. and a space velocity of 2,000-50,000 (hr -1 ), the catalyst consisting of components A and B, the component A being a single oxide of a metal selected from the group consisting of Zr, Ti, and W or a complexed multi oxide of at least two metals selected from the group consisting of Zr, Ti, Al, W and Si, and the component B being a metal or metals selected from the group consisting of Pt, Rh, Pd, Ru, Mn, Cu, Cr, and Fe, and an oxide or oxides thereof.
Claim 9
Dependent Claim
43 words
The method of claim 6, wherein the catalyst uses a carrier of a specific surface area of at least 10 m 2 /g selected from the group consisting of ZrO 2 -TiO 2 and ZrO 2 -TiO 2 -Al 2 O 3 .
Claim 10
Dependent Claim
38 words
The method of claim 6, wherein the catalyst uses a carrier of an integral honeycomb type structural body having an equivalent diameter of throughholes of 30 mm or less and an open porosity of not less than 50%.
Claim 11
Dependent Claim
11 words
The method of claim 6, wherein the temperature is 400-600° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |