Patent US4521743A successfully refreshed from Google Patents.
Patent US2894997A successfully refreshed from Google Patents.
US2894997A
Expired / Lapsed
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Fractional crystallization process and apparatus
Assignee: Phillips Petroleum Co
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Filing: 1955-03-07
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Granted: 1959-07-14
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Expires: 1975-03-07
Abstract
No abstract record available.
Inventors
- 👤 Karl H Hachmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:03
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01D9/0063; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/956
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN A PROCESS FOR SEPARATING A COMPONENT FROM A LIQUID MULT-COMPONENT MIXTURE WHICH COMPRISES PASSING CRYSTALS, FORMED BY SAID COMPONENT BY COOLING SAID MIXTURE, INTO A PURIFICATION ZONE, MOVING SAID CRYSTALS THROUGH SAID PURIFICATION ZONE TOWARDS A MELTING ZONE IN AN INTERMEDIATE PORTION OF SAID PURIFICATION ZONE PASSING SAID CRYSTALS THROUGH A PLURALITY OF ADJACENT PASSAGEWAYS HAVING WALLS FORMED OF A MATERIAL OF HIGH HEAT CONDUCTIVITY, MOVING SAID CRYSTALS FORMED SAID PASSAGEWAYS INTO SAID MELTING ZONE, MELTING CRYSTALS IN SAID MELTING ZONE, DISPLACING AT LEAST A PORTION OF THE MELT INTO SAID MOVING CRYSTALS, TRANSFERRING HEAT THROUGH SAID MATERIAL OF HIGH HEAT CONDUCTIVITY FROM SAID MELTING ZONE THROUGH SAID PURIFICATION ZONE UPSTREAM CRYSTALWISE FROM SAID MELTING ZONE, AND WITHDRAWING A PRODUCT FROM SAID MELTING ZONE, THE IMPROVEMENT WHICH COMPRISES MEASURING THE TEMPERATURE WITHIN AN INTERMEDIATE PORTION OF SAID PURIFICATION ZONE; AND CONTROLLING THE RATE OF PRODUCT WITHDRAWAL IN RESPONSE TO SAID TEMPERATURE MEASUREMENT.
Claim 2
Dependent Claim
153 words
IN A PROCESS FOR SEPARATING A COMPONENT FROM A LIQUID MULT-COMPONENT MIXTURE WHICH COMPRISES PASSING CRYSTALS, FORMED BY SAID COMPONENT BY COOLING SAID MIXTURE, INTO A PURIFICATION ZONE, MOVING SAID CRYSTALS THROUGH SAID PURIFICATION ZONE TOWARDS A MELTING ZONE IN AN INTERMEDIATE PORTION OF SAID PURIFICATION ZONE PASSING SAID CRYSTALS THROUGH A PLURALITY OF ADJACENT PASSAGEWAYS HAVING WALLS FORMED OF A MATERIAL OF HIGH HEAT CONDUCTIVITY, MOVING SAID CRYSTALS FORMED SAID PASSAGEWAYS INTO SAID MELTING ZONE, MELTING CRYSTALS IN SAID MELTING ZONE, DISPLACING AT LEAST A PORTION OF THE MELT INTO SAID MOVING CRYSTALS, TRANSFERRING HEAT THROUGH SAID MATERIAL OF HIGH HEAT CONDUCTIVITY FROM SAID MELTING ZONE THROUGH SAID PURIFICATION ZONE UPSTREAM CRYSTALWISE FROM SAID MELTING ZONE, AND WITHDRAWING A PRODUCT FROM SAID MELTING ZONE, THE IMPROVEMENT WHICH COMPRISES MEASURING THE TEMPERATURE WITHIN AN INTERMEDIATE PORTION OF SAID PURIFICATION ZONE; AND CONTROLLING THE RATE OF PRODUCT WITHDRAWAL IN RESPONSE TO SAID TEMPERATURE MEASUREMENT.
References Cited (Backward Citations)
US2683178A
Cited
US2643217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |