US4301126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for destroying phosgene
Assignee: BASF SE
•
Filing: 1980-04-24
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Granted: 1981-11-17
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Expires: 2000-04-24
Abstract
Abstract To destroy phosgene contained in gases, the phosgene is decomposed catalytically in the presence of active carbon by hydrolysis with water vapor, in the absence of liquid water, at above the dew point of water.
Inventors
- 👤 Gerd Duembgen
- 👤 Erfried Voelkl
- 👤 Gerhard Pforr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:50
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8659; B01D53/8662
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A process for destroying phosgene contained in gases which comprises: passing the gas containing phosgene mixed with water vapor and in the absence of liquid water through a bed of active carbon at a temperature of from 10° to 80° C.
Claim 2
Dependent Claim
41 words
A process for destroying phosgene contained in gases which comprises: passing the gas containing phosgene mixed with water vapor and in the absence of liquid water through a bed of active carbon at a temperature of from 10° to 80° C.
Claim 3
Dependent Claim
20 words
The process of claim 1, wherein the process is carried out at a temperature of from 30° to 60° C.
Claim 4
Dependent Claim
23 words
The process of claim 1, wherein active carbon having an inner surface area of from 800 to 1,500 m 2 /g is employed.
References Cited (Backward Citations)
DE961681C
Cited
US2832670A
Cited
US3314753A
Cited
DE1667438A1
Cited
DE2131403A1
Cited
US4212852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |