US4170629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of converting hydrocarbon waste gas streams using a non-uniform crimped metal ribbon packed catalyst bed
Assignee: Individual
•
Filing: 1977-10-25
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Granted: 1979-10-09
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Expires: 1997-10-25
Abstract
Abstract A catalyst bed packed with metal ribbon strands having a number of different crimped configurations is disclosed. Also disclosed is a method of converting hydrocarbon waste gas streams which utilizes the multi-configurated packed catalyst bed.
Inventors
- 👤 Erwin C. Betz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:15
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2832; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8668; B01J; B01J19/00; B01J19/30; B01J35/00; F01N3/2839; F01N3/2846; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30276; B01J2219/304; B01J2219/30408
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
A method of converting unsaturated hydrocarbons in a waste gas stream to carbon dioxide and water which comprises passing the unsaturated hydrocarbon waste gas stream through a catalyst bed packed with catalytically active crimped metal ribbon at a temperature of at least about 100° C., wherein a substantial proportion of at least two different repeating non-random crimp configurations are present.
Claim 2
Independent Claim
60 words
A method of converting unsaturated hydrocarbons in a waste gas stream to carbon dioxide and water which comprises passing the unsaturated hydrocarbon waste gas stream through a catalyst bed packed with catalytically active crimped metal ribbon at a temperature of at least about 100° C., wherein a substantial proportion of at least two different repeating non-random crimp configurations are present.
Claim 3
Dependent Claim
10 words
The method of claim 1, wherein the hydrocarbon is ethylene.
Claim 4
Dependent Claim
41 words
The method of claim 1, wherein the metal ribbon is an alloy of nickel, chromium and iron, aluminum, chromium and iron, or chromium, silicon and iron and wherein the surfaces of the metal ribbon are coated with a catalytically active metal.
Claim 5
Dependent Claim
16 words
The method of claim 1, wherein the temperature is between about 100° C. and 400° C.
Claim 6
Dependent Claim
18 words
The method of claim 4, wherein a substantial proportion of at least three different crimp configurations are present.
Claim 7
Dependent Claim
17 words
The method of claim 4, wherein the number of strands of each crimp configuration is approximately equal.
Claim 8
Dependent Claim
68 words
The method of claim 1, wherein the unsaturated hydrocarbon is present in a low concentration, the temperature is between about 100° C. and 300° C., the catalytically active crimped metal ribbon is formed from alloy metal ribbons selected from the group consisting of nickel, chromium and iron, aluminum, chromium and iron, and chromium, silicone and iron, and the catalytically active metal is a mixture of platinum and palladium.
Claim 9
Dependent Claim
11 words
The method of claim 7, wherein the unsaturated hydrocarbon is ethylene.
Claim 10
Dependent Claim
18 words
The method of claim 7, wherein a substantial proportion of at least three different crimp configurations are present.
Claim 11
Dependent Claim
12 words
The method of claim 7, wherein the crimped metal ribbon is perforated.
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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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |