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Patent US4424680A successfully refreshed from Google Patents.
US4424680A
Expired / Lapsed
US
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Inexpensive method of recovering condensable vapors with a liquified inert gas
Assignee: Individual
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Filing: 1981-11-09
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Granted: 1984-01-10
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Expires: 2001-11-09
Abstract
Abstract Method and apparatus for recovering, as liquid, condensable vapor contained in a gas stream by refrigerating the gas stream by injecting the liquified phase of an inert gas, such as nitrogen, mixing the combined gas stream and liquified inert has, and separating the condensed condensable vapor from the remaining gas stream and inert gas.
Inventors
- 👤 Ronald D. Rothchild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:40
CPC Classifications
B; B01; B01D; B01D5/00; B01D5/0027; B01D5/0078; B01D5/0084; B01D53/00; B01D53/002
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
79 words
A method for recovering as liquid a condensable vapor comprising the steps of: a. introducing the liquid phase of an inert gas to a gas stream containing said condensable vapor; b. intermixing said gas stream and said liquified inert gas so that said liquified inert gas is vaporized and said gas stream becomes homogeneous in temperature, with the attendant condensation of said condensable vapor; and, c. separating said condensed condensable vapor from said gas stream and vaporized inert gas.
Claim 2
Independent Claim
79 words
A method for recovering as liquid a condensable vapor comprising the steps of: a. introducing the liquid phase of an inert gas to a gas stream containing said condensable vapor; b. intermixing said gas stream and said liquified inert gas so that said liquified inert gas is vaporized and said gas stream becomes homogeneous in temperature, with the attendant condensation of said condensable vapor; and, c. separating said condensed condensable vapor from said gas stream and vaporized inert gas.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said liquified inert gas is introduced as a fine spray.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein step b. comprises causing said gas stream and liquified inert gas to flow through a conduit with a residence time of 1 to 10 seconds.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein said flow in said conduit is turbulent.
Claim 6
Dependent Claim
34 words
The method of claim 1 wherein the introduction of said liquid phase of said inert gas in step a. is directed so that said liquid phase does not flow directly against any solid surfaces.
Claim 7
Independent Claim
50 words
The method of claims 1, 2, 3, 4 or 5 wherein said homogeneous temperatures achieved in step b. is at least 30° F. below the dewpoint of said condensable vapor as it is introduced in step a., and at least 5° F. above the freezing point of said condensable vapor.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein said gas stream includes a non-condensable carrier gas intermixed with said condensable vapor.
Claim 9
Dependent Claim
91 words
Apparatus for recovering as liquid a condensable vapor comprising: a. means for introducing the liquid phase of an inert gas to a gas stream containing said condensable vapor; b. means for mixing said liquid phase of said inert gas with said gas stream to vaporize said liquid phase of said inert gas, condense a portion of said condensable vapor, and render said combined gas stream and vaporized inert gas substantially homogeneous in temperature; and, c. means for separating said condensed condensable vapor from said combined gas stream and vaporized inert gas.
Claim 10
Dependent Claim
91 words
Apparatus for recovering as liquid a condensable vapor comprising: a. means for introducing the liquid phase of an inert gas to a gas stream containing said condensable vapor; b. means for mixing said liquid phase of said inert gas with said gas stream to vaporize said liquid phase of said inert gas, condense a portion of said condensable vapor, and render said combined gas stream and vaporized inert gas substantially homogeneous in temperature; and, c. means for separating said condensed condensable vapor from said combined gas stream and vaporized inert gas.
Claim 11
Dependent Claim
46 words
Apparatus as defined in claim 8 wherein said means for mixing said gas stream with said liquified phase of said inert gas comprises a section of conduit scaled to the flow rate of said gas stream so that the flow of said gas stream is turbulent.
Claim 12
Dependent Claim
55 words
Apparatus as defined in claim 8 wherein said means for mixing said gas stream with said liquified phase of said inert gas comprises a section of conduit scaled to the flow rate of said gas stream so that the residence time of said gas stream in said section of conduit is 1 to 10 seconds.
Claim 13
Dependent Claim
62 words
Apparatus as defined in claims 8, 9 or 10 further comprising means for introducing said liquified phase of said inert gas at a regulated rate so that said homogeneous temperature is at least 30° F. below the dewpoint of said condensable vapor as it is introduced to said apparatus, and at least 5° F. above the freezing point of said condensable vapor.
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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |