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US2540977A Expired / Lapsed US ⏱️ 0.0 years remaining

Continuous fractional crystallization process

Assignee: Phillips Petroleum Co
•
Filing: 1945-01-02
•
Granted: 1951-02-06
•
Expires: 1965-01-02
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Abstract

No abstract record available.

Inventors

  • 👤 Philip M Arnold

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 03:04
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; C; C07; C07C; C07C7/00; C07C7/14

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 201 words
THE CONTINUOUS PROCESS FOR THE SEPARATION AND PURIFICATION OF A MULTICOMPONENT ORGANIC MIXTURE FROM WHICH CRYSTALS CONTAINING AT LEAST TWO COMPONENTS OF DIFFERENT MELTING POINTS SEPARATE UPON COOLING, WHICH COMPRISES CONTINUOUSLY INTRODUCING A LIQUID ORGANIC MULTICOMPONENT FEED MIXTURE INTO A HORIZONTIALLY ELONGATED SEPARATION THE ENDS THEREOF; CONTINUOUSLY MAINTAINING BY INDIRECT HEAT-EXCHANGE A TEMPERATURE TAINING BY INDIRECT HEAT-EXCHANGE A TEMPERATURE POINT OF THE HIGHEST MELTING COMPONENT OF SAID POINT OF THE HIGHEST MELTING COMPONENT OF SAID MIXTURE AND A TEMPERATURE AT THE OTHER END OF SAID ZONE AT LEAST AS LOW AS THE DOLIDIFICATION POINT OF MULTICOMPONENT CRYSTALS AND ABOVE THE SOLIDIFICATION POINT OF THE ENTIRE MIXTURE; CONTINUOUSLY PASSING SAID LIQUID TOWARD THE LOW TEMPERATURE END SO AS TO FORM MULTICOMPONENT CRYSTALS; CONTINUOUSLY MECHANICALLY PASSING THE CRYSTALS THUS FORMED TOWARD THE HIGH TEMPERATURE END THEREBY GRADUALLY RISING THE TEMPERATURE END THEREBY FRADUALLY RISING THE TEMPERAPONENTS THEREFROM AND FINALLY COMPLETELY MELTING SAID CRYSTALS; CONTINUOUSLY PASSING A PORTION OF THE MELTED HIGHER MELTING COMPONENT TOWARD SAID LOW TEMPERATURE END IN COUNTERCURRENT FLOW TO SAID CRYSTALS AS A REFLUX; AND CONTINUOUSLY RECOVERING LIQUID HIGHER MELTING SEPARATED COMPONENT FROM SAID HIGH TEMPERATURE END AND LIQUOR LEAN IN SAID HIGHER MELTING COMPONENT FROM SAID LOW TEMPERATURE END.

References Cited (Backward Citations)

US930909A Cited
US1530398A Cited
US1880925A Cited
US1963921A Cited
US2147222A Cited
US2194185A Cited
US2307130A Cited
US2322438A Cited
US2348329A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1954-02-05 1954-08-07 1955-02-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1958-02-05 1958-08-07 1959-02-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1962-02-05 1962-08-07 1963-02-06 $7700.00 Window Closed / Lapsed

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