US3886759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recovery of hydrocarbon vapors
Assignee: Individual
•
Filing: 1973-01-26
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Granted: 1975-06-03
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Expires: 1993-01-26
Abstract
Abstract A method for the recovery of hydrocarbon vapors from a vessel while vapors are being expelled from the vessel during the filling thereof is disclosed. The composition of the expelled hydrocarbon vapor is controlled to a given composition by either dillution with air or by enrichment with hydrocarbons. A controlled volume of this hydrocarbon composition at a controlled temperature is passed into a compressor and compressed. The compressed gas is cooled. This compressed gas is passed through an absorber at a controlled temperature where more than 90% of the hydrocarbons are removed. A nonflammable gas mixture having less than 2% hydrocarbon can be obtained, if desired.
Inventors
- 👤 Gerald P Mcnamee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:00
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/04; B67D7/0476; B65; B65D; B65D90/00; B65D90/22; B65D90/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A method of recovering hydrocarbon vapors from a hydrocarbon vapor-air mixture which is being expelled from a vessel during the filling of said vessel with hydrocarbons comprising the steps of controlling the hydrocarbon content of said vapor/air mixture by controlling the temperature thereof, controlling the volume of said vapor/air mixture and passing said vapor/air mixture into a compressor, compressing said vapor/air mixture to form a compressed mixture, cooling said compressed mixture, and passing said compressed mixture into a first absorber to form and absorbed mixture having a liquid hydrocarbon at a controlled temperature whereby said liquid hydrocarbon removes a substantial protion of said hydrocarbon vapor from said compressed mixture.
Claim 2
Independent Claim
109 words
A method of recovering hydrocarbon vapors from a hydrocarbon vapor-air mixture which is being expelled from a vessel during the filling of said vessel with hydrocarbons comprising the steps of controlling the hydrocarbon content of said vapor/air mixture by controlling the temperature thereof, controlling the volume of said vapor/air mixture and passing said vapor/air mixture into a compressor, compressing said vapor/air mixture to form a compressed mixture, cooling said compressed mixture, and passing said compressed mixture into a first absorber to form and absorbed mixture having a liquid hydrocarbon at a controlled temperature whereby said liquid hydrocarbon removes a substantial protion of said hydrocarbon vapor from said compressed mixture.
Claim 3
Independent Claim
109 words
A METHOD OF RECOVERING HYDROCARBON VAPORS FROM A HYDROCARBON VAPOR-AIR MIXTURE WHICH IS BEING EXPELLED FROM A VESSEL DURING THE FILLING OF SAID VESSEL WITH HYDROCARBONS, COMPRISING THE STEPS OF CONTROLLING THE HYDROCARBON CONTENT OF SAID VAPOR/AIR MIXTURE BY CONTROLLING THE TEMPERATURE THEREOF, CONTROLLING THE VOLUME OF SAID VAPOR/AIR MIXTURE AND PASSING SAID VAPOR/AIR MIXTURE INTO A COMPRESSOR, COMPRESSING SAID VAPOR/AIR MIXTURE TO FORM A COMPRESSED MIXTURE, COOLING SAID COMPRESSED MIXTRUE AND PASSING SAID COMPRESSED MIXTURE INTO A FIRST ABSORBER TO FORM AND ABSORBED MIXTURE WHEREBY SAID LIQUID HYDROCARBON AT A CONTROLLED TEMPERATURE WHEREBY SAID LIQUID HYDROCARBON REMOVES A SUBSTANTIAL PROTION OF SAID HYDROCARBON VAPOR FROM SAID COMPRESSED MIXTURE.
Claim 4
Independent Claim
109 words
A METHOD OF RECOVERING HYDROCARBON VAPORS FROM A HYDROCARBON VAPOR-AIR MIXTURE WHICH IS BEING EXPELLED FROM A VESSEL DURING THE FILLING OF SAID VESSEL WITH HYDROCARBONS, COMPRISING THE STEPS OF CONTROLLING THE HYDROCARBON CONTENT OF SAID VAPOR/AIR MIXTURE BY CONTROLLING THE TEMPERATURE THEREOF, CONTROLLING THE VOLUME OF SAID VAPOR/AIR MIXTURE AND PASSING SAID VAPOR/AIR MIXTURE INTO A COMPRESSOR, COMPRESSING SAID VAPOR/AIR MIXTURE TO FORM A COMPRESSED MIXTURE, COOLING SAID COMPRESSED MIXTRUE AND PASSING SAID COMPRESSED MIXTURE INTO A FIRST ABSORBER TO FORM AND ABSORBED MIXTURE WHEREBY SAID LIQUID HYDROCARBON AT A CONTROLLED TEMPERATURE WHEREBY SAID LIQUID HYDROCARBON REMOVES A SUBSTANTIAL PROTION OF SAID HYDROCARBON VAPOR FROM SAID COMPRESSED MIXTURE.
Claim 5
Dependent Claim
38 words
A method as described in claim 1 whereby the hydrocarbon content of said vapor/air mixture passing into said compressor is between 4 to 75 percent hydrocarbon and the temperature of said mixture is between 35* to 120* F.
Claim 6
Dependent Claim
17 words
A method as described in claim 1 whereby said vapor/air mixture is compressed up to 600 psia.
Claim 7
Dependent Claim
24 words
A method as described in claim 1 whereby said liquid hydrocarbon in said first absorber is at a temperature between -40* to 130* F.
Claim 8
Dependent Claim
38 words
A method as described in claim 1 including the step of passing the absorbed mixture into a second absorber having liquid hydrocarbon at a controlled temperature lower than the temperature of the liquid hydrocarbon in said first absorber.
Claim 9
Dependent Claim
27 words
A method as described in claim 1 including the step of passing the absorber mixture into an expander whereby the temperature of said absorbed mixture is lowered.
Claim 10
Dependent Claim
23 words
A method as described in claim 6 whereby the expanded absorbed mixture obtained in claim 6 is used for cooling the compressed mixture.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |