US3436211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedures for removing impurities from aluminum trichloride gas
Assignee: Alcan Research and Development Ltd
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Filing: 1966-10-28
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Granted: 1969-04-01
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Expires: 1986-10-28
Abstract
No abstract record available.
Inventors
- 👤 Ernest William Dewing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:42
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/20; C01F11/24; C01F11/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
218 words
A METHOD OF REMOVING, FROMA GAS FLOW COMPRISING ALUMINUM TRICHLORIDE GAS AND ADVANCING ALONG ADEFINED PATH, AT LEAST ONE METAL CHLORIDE OF THE CLASS CONSISTING OF CALCIUM CHLORIDE AND MAGNESIUM CHLORIDE PRESENT IN VOLATILIZED STATE IN SAID FLOW AND HAVING AN EFFECTIVE VAPOR PRESSURE MINIMUM THEREIN AT A TEMPERATURE ABOVE THE MELTING POINT OF SAID ONE CHLORIDE, SAID METHOD COMPRISING: (A) CONDUCTING SAID FLOW INTO EXTENDED SURFACE CONTACT WITH HEAT TRANSFER MATERIAL AT A PRESELECTED LOCALITY IN SAID PATH AT WHICH SAID FLOW IS AT OAN INITAL TEMPERATURE DIFFERENT FROM THE TEMPERATURE OF SAID EFFECTIVE VAPOR PRESSURE MINIMU, WHILE (B) MAINTAINING SAID HEAT TRANSFER MATERIAL AT A PREDETERMINED TEMPERATURE CLOSER THAN SAID INTIAL FLOW TEMPERATURE TO THE TEMPERATURE OF SAID EFFECTIVE VAPOR PRESSURE MINIMUM, FOR ALTERING THE TEMPERATURE OF SAID FLOW IN THE DIRECTION OF SAID PREDETERMINED TEMPERATURE TO EFFECT CONDENSATION OF SAID ONE CHLORIDE FROM SAID FLOW AS SAID PRESELECTED LOCALITY, SAID TEMPERATURE OF SAID EFFECTIVE VAPOR PRESSURE MINIMUM BEING IN A RANGE BETWEEN ABOUT 900*C. AND ABOUT 1100*C., SAID INITIAL FLOW TEMPERATURE BEING IN A RANGE BETWEEN ABOUT 600*C. AND ABOUT 1300*C., SAID PREDETERMINED TEMPERATURE CORRESPONDING TO A SELECTED VALUE OF EFFECTIVE VAPOR PRESSURE OF SAID ONE CHLORIDE IN SAID FLOW, LOWER THAN THE VALUE OF EFFECTIVE VAPOR PRESSURE CORRESSPONDING TO SAID INITIAL FLOW TEMPERATURE; AND
Claim 2
Independent Claim
218 words
A METHOD OF REMOVING, FROMA GAS FLOW COMPRISING ALUMINUM TRICHLORIDE GAS AND ADVANCING ALONG ADEFINED PATH, AT LEAST ONE METAL CHLORIDE OF THE CLASS CONSISTING OF CALCIUM CHLORIDE AND MAGNESIUM CHLORIDE PRESENT IN VOLATILIZED STATE IN SAID FLOW AND HAVING AN EFFECTIVE VAPOR PRESSURE MINIMUM THEREIN AT A TEMPERATURE ABOVE THE MELTING POINT OF SAID ONE CHLORIDE, SAID METHOD COMPRISING: (A) CONDUCTING SAID FLOW INTO EXTENDED SURFACE CONTACT WITH HEAT TRANSFER MATERIAL AT A PRESELECTED LOCALITY IN SAID PATH AT WHICH SAID FLOW IS AT OAN INITAL TEMPERATURE DIFFERENT FROM THE TEMPERATURE OF SAID EFFECTIVE VAPOR PRESSURE MINIMU, WHILE (B) MAINTAINING SAID HEAT TRANSFER MATERIAL AT A PREDETERMINED TEMPERATURE CLOSER THAN SAID INTIAL FLOW TEMPERATURE TO THE TEMPERATURE OF SAID EFFECTIVE VAPOR PRESSURE MINIMUM, FOR ALTERING THE TEMPERATURE OF SAID FLOW IN THE DIRECTION OF SAID PREDETERMINED TEMPERATURE TO EFFECT CONDENSATION OF SAID ONE CHLORIDE FROM SAID FLOW AS SAID PRESELECTED LOCALITY, SAID TEMPERATURE OF SAID EFFECTIVE VAPOR PRESSURE MINIMUM BEING IN A RANGE BETWEEN ABOUT 900*C. AND ABOUT 1100*C., SAID INITIAL FLOW TEMPERATURE BEING IN A RANGE BETWEEN ABOUT 600*C. AND ABOUT 1300*C., SAID PREDETERMINED TEMPERATURE CORRESPONDING TO A SELECTED VALUE OF EFFECTIVE VAPOR PRESSURE OF SAID ONE CHLORIDE IN SAID FLOW, LOWER THAN THE VALUE OF EFFECTIVE VAPOR PRESSURE CORRESSPONDING TO SAID INITIAL FLOW TEMPERATURE; AND
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |