Patent US3977952A successfully refreshed from Google Patents.
US3977952A
Expired / Lapsed
US
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Process for decomposing carbon-containing compounds
Assignee: CF Spiess and Sohn GmbH and Co
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Filing: 1974-08-12
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Granted: 1976-08-31
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Expires: 1994-08-12
Abstract
Abstract Carbon-containing compounds contained in a gas, such as polluted air or an industrial flue gas, or in a liquid, such as an aqueous solution or dispension, e.g. sewage liquid, contaminated drinking water or waste electroplating baths, are decomposed by being subjected to radiation of a wave length of about 20 to 600 nm in the presence of water and oxygen in excess of the stoichiometric amount required for complete oxidation. A catalytic quantity of hydrogen chloride may also be present. A suitable apparatus is also provided, comprising a chamber containing a source of radiation, a gas inlet and outlet, and means for spraying liquid into said chamber.
Inventors
- 👤 Kurt Knoevenagel
- 👤 Rolf Himmelreich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:33
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; B01D; B01D49/00; C; C02; C02F; C02F1/00; C02F1/30; C02F1/32; C02F1/72; C02F1/725; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02W; Y02W10/00; Y02W10/30; Y02W10/37; Y10; Y10S; Y10S204/00; Y10S204/13
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
A process for the decomposition of a carbon-containing compound substantially completely to carbon dioxide which comprises exposing to radiation of a wave length of about 20 to 600 nm a mixture consisting essentially of said compound with water containing a catalytic amount of hydrogen chloride while supplying oxygen in excess of the stoichiometric amount required for complete oxidation of said compound.
Claim 2
Dependent Claim
61 words
A process for the decomposition of a carbon-containing compound substantially completely to carbon dioxide which comprises exposing to radiation of a wave length of about 20 to 600 nm a mixture consisting essentially of said compound with water containing a catalytic amount of hydrogen chloride while supplying oxygen in excess of the stoichiometric amount required for complete oxidation of said compound.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the irradiated product is treated to remove therefrom hydrogen chloride contained therein.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the aqueous solution comprises waste liquid sewage.
Claim 5
Dependent Claim
38 words
The process of claim 1 wherein the aqueous solution comprises a waste solution containing at least one of silver cyanide and gold cyanide, at least one of silver and gold being precipitated in the course of the irradiation.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the aqueous solution comprises contaminated ground- or drinking water.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein the carbon-containing compound is present in polluted air which is subjected to the irradiation.
Claim 8
Dependent Claim
22 words
The process of claim 1 wherein the carbon-containing compound is present in an industrial flue gas which is subjected to the irradiation.
Claim 9
Dependent Claim
16 words
The process of claim 1 wherein the gas subjected to irradiation is saturated with water vapor.
Claim 10
Dependent Claim
17 words
The process of claim 1, wherein the mixture comprises an aqueous emulsion or suspension of said compound.
Claim 11
Dependent Claim
12 words
The process of claim 9, wherein said compound comprises a polymeric material.
Claim 12
Dependent Claim
12 words
The process of claim 9, wherein said compound comprises a chlorinated hydrocarbon.
Claim 13
Dependent Claim
11 words
The process of claim 9, wherein said compound comprises a hydrocarbon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |