US3972979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of decomposing halohydrocarbons
Assignee: Mitsubishi Chemical Corp
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Filing: 1974-05-14
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Granted: 1976-08-03
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Expires: 1994-05-14
Abstract
Abstract Exhaust gas containing a halohydrocarbon having 1 - 10 carbon atoms and molecular oxygen is contacted with chromium oxide or a boehmite supported platinum at an elevated temperature to decompose the halohydrocarbon to carbon dioxide, water, hydrogen halide and free halogen.
Inventors
- 👤 Yoichi Kageyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:20
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/20; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; B01D53/70; B01D53/72; B01D53/74; B01D53/86; B01D53/8659; B01D53/8662; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J23/38; B01J23/40; B01J23/42; B01J23/54; B01J23/56; B01J23/64; B01J23/652; B01J23/6522; C01B7/01; C01B7/09; C01B7/13; C01B7/191
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
A method of oxidatively decomposing a chlorohydrocarbon having from 1 to 10 carbon atoms to carbon dioxide, water, hydrogen chloride and free chlorine which comprises contacting an exhaust gas containing from 10 - 50,000 ppm of said chlorohydrocarbon and molecular oxygen with a catalytic amount of boehmite-supported platinum catalyst at a temperature of from 200° - 500° C.
Claim 2
Independent Claim
58 words
A method of oxidatively decomposing a chlorohydrocarbon having from 1 to 10 carbon atoms to carbon dioxide, water, hydrogen chloride and free chlorine which comprises contacting an exhaust gas containing from 10 - 50,000 ppm of said chlorohydrocarbon and molecular oxygen with a catalytic amount of boehmite-supported platinum catalyst at a temperature of from 200° - 500° C.
Claim 3
Dependent Claim
21 words
The process of claim 1, wherein the catalyst contains 0.03 - 5% by weight of platinum supported on a boehmite carrier.
Claim 4
Dependent Claim
19 words
The process of claim 1, wherein the space velocity of the gas is 5,000 - 300,000 hr.sup. -1 .
Claim 5
Dependent Claim
15 words
The process of claim 1, wherein the chlorohydrocarbon is a chlorohydrocarbon having 1-2 carbon atoms.
References Cited (Backward Citations)
US3705010A
Cited
US3845191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |