Patent US3944487A successfully refreshed from Google Patents.
US3944487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic filtering-incinerating process and device for waste water
Assignee: ATK Launch Systems LLC
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Filing: 1974-12-04
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Granted: 1976-03-16
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Expires: 1994-12-04
Abstract
Abstract The pollutants are oxidized with oxygen atoms obtained from catalytic decomposition of hypochlorite ions and are filtered out and entrapped on the catalytic material of the filter bed as the waste water flows through the bed. The catalytic material catalyzes the incineration of the trapped pollutants by an oxidizing gas which flows through the bed of the catalyst and which regenerates the catalyst.
Inventors
- 👤 Delmar B. Davis
- 👤 Wendell N. Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:46
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; B; B01; B01J; B01J8/00; B01J8/02; B01J2208/00; B01J2208/00008; B01J2208/00548
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
188 words
The method for destroying oxidizable pollutants of atomic to colloidal size in water, comprising the steps of: adding hypochlorite ions to the water; flowing the water through a filter bed of particulate, porous, refractory, substrate material containing catalytic material composed of oxides of at least one metal selected from the group consisting of nickel, iron, cobalt, iridium, and mixtures thereof, said oxides formed at temperatures from 550° to 900°F in the presence of a gas containing oxygen, and within the pores of said substrate, wherein said substrate is selected from aluminas having an average pore diameter within the range from 80 to 100 angstroms, and molecular sieves with channels having an average opening from 8 to 40 angstroms, whereby the metallic oxides catalyze decomposition of the hypochlorite ions to produce atomic oxygen, which oxidizes at least some of the pollutants into harmless products; draining the filtered water from the filter bed; heating the filter bed to above 900°F; and forcing oxygen-containing gas through the filter bed, whereby any remaining pollutants entrapped by the filter bed are incinerated, the filter bed is cleaned, and the metal-oxide catalysts are refurbished.
Claim 2
Independent Claim
188 words
The method for destroying oxidizable pollutants of atomic to colloidal size in water, comprising the steps of: adding hypochlorite ions to the water; flowing the water through a filter bed of particulate, porous, refractory, substrate material containing catalytic material composed of oxides of at least one metal selected from the group consisting of nickel, iron, cobalt, iridium, and mixtures thereof, said oxides formed at temperatures from 550° to 900°F in the presence of a gas containing oxygen, and within the pores of said substrate, wherein said substrate is selected from aluminas having an average pore diameter within the range from 80 to 100 angstroms, and molecular sieves with channels having an average opening from 8 to 40 angstroms, whereby the metallic oxides catalyze decomposition of the hypochlorite ions to produce atomic oxygen, which oxidizes at least some of the pollutants into harmless products; draining the filtered water from the filter bed; heating the filter bed to above 900°F; and forcing oxygen-containing gas through the filter bed, whereby any remaining pollutants entrapped by the filter bed are incinerated, the filter bed is cleaned, and the metal-oxide catalysts are refurbished.
Claim 3
Dependent Claim
15 words
The improved process as recited in claim 1 wherein the oxides are oxides of cobalt.
Claim 4
Dependent Claim
15 words
The improved process as recited in claim 1 wherein the oxides are oxides of nickel.
Claim 5
Dependent Claim
15 words
The improved process as recited in claim 1 wherein the oxides are oxides of iridium.
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |