Patent US3304727A successfully refreshed from Google Patents.
US3304727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflux condensation by heat exchange with a composite stream
Assignee: Phillips Petroleum Co
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Filing: 1964-11-23
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Granted: 1967-02-21
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Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Carleton H Roskamp
- 👤 Donald R Bates
- 👤 Robert D Heckart
- 👤 Luther F Mayhue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:03
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/425; B01D1/00; B01D1/28; B01D1/2803; B01D1/284; B01D1/2843; B01D1/2896; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
230 words
A METHOD OF PURIFYING AN ETHYLENE-HYDROCARBON FEED CONTAINING HYDROCARBONS AND OTHER COMPOUNDS THAT BOIL AT A LOWER TEMPERATURE THAN ETHYLENE WHICH COMPRISES COOLING SAID FEED TO A TEMPERATURE AND PRESSURE AT WHICH SUBSTANTIALLY ALL THE COMPONENTS IN SAID FEED ARE LIQUEFIED EXCEPT SAID HYDROCARBONS AND OTHER COMPOUNDS, REMOVING AT LEAST A PART OF SAID HYDROCARBONS AND OTHER COMPOUNDS TO FORM A FIRST VAPOROUS STREAM, FRACTIONATING THE REMAINING LIQUID FEED PORTION TO REMOVE OVERHEAD SUBSTANTIALLY THE REMAINDER OF SAID HYDROCARBONS AND OTHER COMPOUNDS IN SAID FEED AND TO FORM A SECOND VAPOROUS STREAM, HEAT EXCHANGING THE SECOND VAPOROUS STREAM WITH A COMPOSITE STREAM TO LIQUIFY A PORTION OF SAID SECOND VAPOROUS STREAM AND LEAVE A THIRD VAPOROUS STREAM FORMED FROM SAID SECOND VAPOROUS STREAM, LOWERING THE PRESSURES OF SAID FIRST AND THIRD VAPOROUS STREAMS TO EXPAND AND TO COOL SAME, COMBINING SAID COOLED FIRST AND THIRD VAPOROUS STREAMS TO FORM THE COMPOSITE STREAM, CONTACTING IN THE SAID HEAT EXCHANGE RELATIONSHIP SAID COMPOSITE STREAM AND SAID SECOND VAPOROUS STREAM TO COOL AND THEREFORE CONDENSE AT LEAST IN PART SAID SECOND VAPOROUS STREAM, THEREAFTER CONTACTING IN HEAT EXCHANGE RELATIONSHIP AT LEAST ONE TIME SAID COMPOSITE STREAM WITH INCOMING ETHYLENE-HYDROCARBON FEED WHICH IS TO BE PURIFIED TO COOL AND CONDENSE AT LEAST A PART OF SAID FEED FOR SUBSEQUENT SEPARATION THEREFROM OF HYDROCARBONS AND OTHER COMPOUNDS THAT BOIL AT A LOWER TEMPERATURE THAN ETHYLENE.
Claim 2
Independent Claim
230 words
A METHOD OF PURIFYING AN ETHYLENE-HYDROCARBON FEED CONTAINING HYDROCARBONS AND OTHER COMPOUNDS THAT BOIL AT A LOWER TEMPERATURE THAN ETHYLENE WHICH COMPRISES COOLING SAID FEED TO A TEMPERATURE AND PRESSURE AT WHICH SUBSTANTIALLY ALL THE COMPONENTS IN SAID FEED ARE LIQUEFIED EXCEPT SAID HYDROCARBONS AND OTHER COMPOUNDS, REMOVING AT LEAST A PART OF SAID HYDROCARBONS AND OTHER COMPOUNDS TO FORM A FIRST VAPOROUS STREAM, FRACTIONATING THE REMAINING LIQUID FEED PORTION TO REMOVE OVERHEAD SUBSTANTIALLY THE REMAINDER OF SAID HYDROCARBONS AND OTHER COMPOUNDS IN SAID FEED AND TO FORM A SECOND VAPOROUS STREAM, HEAT EXCHANGING THE SECOND VAPOROUS STREAM WITH A COMPOSITE STREAM TO LIQUIFY A PORTION OF SAID SECOND VAPOROUS STREAM AND LEAVE A THIRD VAPOROUS STREAM FORMED FROM SAID SECOND VAPOROUS STREAM, LOWERING THE PRESSURES OF SAID FIRST AND THIRD VAPOROUS STREAMS TO EXPAND AND TO COOL SAME, COMBINING SAID COOLED FIRST AND THIRD VAPOROUS STREAMS TO FORM THE COMPOSITE STREAM, CONTACTING IN THE SAID HEAT EXCHANGE RELATIONSHIP SAID COMPOSITE STREAM AND SAID SECOND VAPOROUS STREAM TO COOL AND THEREFORE CONDENSE AT LEAST IN PART SAID SECOND VAPOROUS STREAM, THEREAFTER CONTACTING IN HEAT EXCHANGE RELATIONSHIP AT LEAST ONE TIME SAID COMPOSITE STREAM WITH INCOMING ETHYLENE-HYDROCARBON FEED WHICH IS TO BE PURIFIED TO COOL AND CONDENSE AT LEAST A PART OF SAID FEED FOR SUBSEQUENT SEPARATION THEREFROM OF HYDROCARBONS AND OTHER COMPOUNDS THAT BOIL AT A LOWER TEMPERATURE THAN ETHYLENE.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |