Patent US4088465A successfully refreshed from Google Patents.
US4088465A
Expired / Lapsed
US
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Process for recovering a combustible gas
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1976-12-01
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Granted: 1978-05-09
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Expires: 1996-12-01
Abstract
Abstract An improved process for recovering a combustible gas including a first means for measuring the relative concentration of combustible gas and combustion-supporting gas before the gaseous mixture enters a gas recovering apparatus, and a second means for determining the relative concentration of combustible gas and combustion-supporting gas after the gaseous mixture leaves the gas recovering apparatus. The first gas detecting means prevents a gaseous mixture containing a combustible gas in a concentration less than the U.E.L. from entering the gas recovering apparatus. The second detecting means controls the gas recovering apparatus to insure that the concentration of combustible gas never falls below the upper limit of the detonation range.
Inventors
- 👤 Kazumi Uda
- 👤 Motohiko Tamura
- 👤 Ichiro Nishiura
- 👤 Hiroshi Fujiike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:12
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/30; F; F17; F17C; F17C13/00; F17C13/02; G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0031; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/035; F17C2260/00; F17C2260/04; F17C2260/042; Y; Y10; Y10T; Y10T436/00; Y10T436/21; Y10T436/214; Y10T436/216
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
151 words
In a process for recovering a combustible gas in a gas recovering apparatus from a gaseous mixture comprising a combustible gas and a combustion-supporting gas, said gaseous mixture having a known explosion range upper limit and a known detonation range upper limit, the improvement comprising: measuring an initial combustible gas content of said gaseous mixture before said gaseous mixture enters said gas recovering apparatus, permitting only gaseous mixtures having a combustible gas content above the explosion range upper limit to enter the gas recovery apparatus, recovering combustible gas from said gaseous mixture to reduce the combustible gas content of said gaseous mixture below the explosion range upper limit but above said detonation range upper limit, measuring a final combustible gas content of said gaseous mixture as said gaseous mixture leaves said gas recovering apparatus, and maintaining said combustible gas content in said gas recovery apparatus above said detonation range upper limit.
Claim 2
Dependent Claim
151 words
In a process for recovering a combustible gas in a gas recovering apparatus from a gaseous mixture comprising a combustible gas and a combustion-supporting gas, said gaseous mixture having a known explosion range upper limit and a known detonation range upper limit, the improvement comprising: measuring an initial combustible gas content of said gaseous mixture before said gaseous mixture enters said gas recovering apparatus, permitting only gaseous mixtures having a combustible gas content above the explosion range upper limit to enter the gas recovery apparatus, recovering combustible gas from said gaseous mixture to reduce the combustible gas content of said gaseous mixture below the explosion range upper limit but above said detonation range upper limit, measuring a final combustible gas content of said gaseous mixture as said gaseous mixture leaves said gas recovering apparatus, and maintaining said combustible gas content in said gas recovery apparatus above said detonation range upper limit.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said combustible gas is gasoline vapor and said combustion-supporting gas is air.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein said combustible gas is propane vapor and said combustion-supporting gas is air.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein said combustible gas is butadiene vapor and said combustion-supporting gas is air.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein said combustible gas is a hydrocarbon and said combustion-supporting gas is air.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein said combustible gas is recovered by a process of compression, cooling, and condensation.
Claim 8
Dependent Claim
19 words
The process of claim 2 wherein the final combustible gas content of said gaseous mixture is 5% by volume.
Claim 9
Dependent Claim
19 words
The process of claim 3 wherein the final combustible gas content of said gaseous mixture is 10% by volume.
Claim 10
Dependent Claim
19 words
The process of claim 4 wherein the final combustible gas content of said gaseous mixture is 7% by volume.
Claim 11
Dependent Claim
33 words
The process of claim 2 where the initial gasoline vapor content of the gaseous mixture is 35% by volume and the final gasoline vapor content of the gaseous mixture is 5% by volume.
References Cited (Backward Citations)
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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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |