US3152872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
•
Filing: —
•
Granted: 1964-10-13
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Expires: 1981-10-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:31
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/2435
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A METHOD OF RECOVERING POYMER SOLIDS FROM A POLYMERIZATION EFFLUENT WHICH IS A SLURRY OF SAID SOLIDS IN LIQUID HYDROCARBON DILUENT WHICH COMPRISES FLASHING HYDROCARBON DILUENT WHICH COMPRISES FLASHING ZONE THEREBY FORMING A STREAM OF HYDROCARBON VAPOR AND POLYMER SOLIDS CARRYING RESIDUAL DILUENT, WITHDRAWING FLASED HYDROCARBON VAPORS FROM SAID FLASH ZONE, CONTACTING SAID VAPORS WITH RELATIVELY COOL LIQUID HYDROCARBON DILUENT TO CONDENSE MOST OF SAID VAPORS IN A CONTACTING ZONE, VENTING UNCONENSED HYDROCARBON VAPORS AND GASES FROM SAID CONTACTING ZONE, RECIRCULATING CONDENSED HYDROCARBON DILUENT WITH THE CONTACTING DILUENT TO THE POLYMERIZATION PROCESS, PASSING SAID POLYMER SOLIDS FROM SAID FLASH ZONE TO A DRYING ZONE BY WAY OF A CONNECTING CHANNEL, MAINTAINING AN ATMOSPHERE OF HYDROCARBON GAS WITHIN SAID CONNECTING CHANNEL, PASSING AT LEAST A PORTION OF THE UNCONDENSED MATERIAL VENTED FROM SAID CONTACTING ZONE TO SAID CONNECTING CHANNEL TO PROVIDE SAID ATMOSPHERE, MAINTAINING THE PRESSURE IN SAID CONNECTING CHANNEL SLIGHTLY GREATER THAN THE PRESSURES IN EITHER SAID FLASH ZONE OR SAID DRYING ZONE, CONTACTING SAID POLYMER SOLIDS WITH NONCOMBUSTIBLE GAS IN SAID DRYING ZONE THEREBY EVAPORATING RESIDUAL HYDROCARBON DILUENT FROM SAID SOLIDS, AND CONVEYING THE THUS DRIED POLYMER SOLIDS IN AN AIR STREAM TO A SUBSEQUENT OPERATION.
Claim 2
Independent Claim
197 words
A METHOD OF RECOVERING POYMER SOLIDS FROM A POLYMERIZATION EFFLUENT WHICH IS A SLURRY OF SAID SOLIDS IN LIQUID HYDROCARBON DILUENT WHICH COMPRISES FLASHING HYDROCARBON DILUENT WHICH COMPRISES FLASHING ZONE THEREBY FORMING A STREAM OF HYDROCARBON VAPOR AND POLYMER SOLIDS CARRYING RESIDUAL DILUENT, WITHDRAWING FLASED HYDROCARBON VAPORS FROM SAID FLASH ZONE, CONTACTING SAID VAPORS WITH RELATIVELY COOL LIQUID HYDROCARBON DILUENT TO CONDENSE MOST OF SAID VAPORS IN A CONTACTING ZONE, VENTING UNCONENSED HYDROCARBON VAPORS AND GASES FROM SAID CONTACTING ZONE, RECIRCULATING CONDENSED HYDROCARBON DILUENT WITH THE CONTACTING DILUENT TO THE POLYMERIZATION PROCESS, PASSING SAID POLYMER SOLIDS FROM SAID FLASH ZONE TO A DRYING ZONE BY WAY OF A CONNECTING CHANNEL, MAINTAINING AN ATMOSPHERE OF HYDROCARBON GAS WITHIN SAID CONNECTING CHANNEL, PASSING AT LEAST A PORTION OF THE UNCONDENSED MATERIAL VENTED FROM SAID CONTACTING ZONE TO SAID CONNECTING CHANNEL TO PROVIDE SAID ATMOSPHERE, MAINTAINING THE PRESSURE IN SAID CONNECTING CHANNEL SLIGHTLY GREATER THAN THE PRESSURES IN EITHER SAID FLASH ZONE OR SAID DRYING ZONE, CONTACTING SAID POLYMER SOLIDS WITH NONCOMBUSTIBLE GAS IN SAID DRYING ZONE THEREBY EVAPORATING RESIDUAL HYDROCARBON DILUENT FROM SAID SOLIDS, AND CONVEYING THE THUS DRIED POLYMER SOLIDS IN AN AIR STREAM TO A SUBSEQUENT OPERATION.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |