US2843455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of aluminum chloride
Assignee: Gulf Research and Development Co
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Filing: 1955-07-21
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Granted: 1958-07-15
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Expires: 1975-07-21
Abstract
No abstract record available.
Inventors
- 👤 William A Pardee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:52
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01F7/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
THE REPTITIVE TWO-STAGE CYCLIC PROCESS OF REMOVING IRON CHLORIDE FROM ANHYDROUS ALUMINUM CHLORIDE CONTAMINATED WITH THE SAME WHICH COMPRISES SETTING UP AN EXTENDED SURFACE OF METALLIC ALUMINUM ON AN INERT SUPPORTING MATERIAL; IN THE FIRST STAGE, PASSING THE CONTAMINATED ALUMINUM CHLORIDE IN VAPOR FORM AT A TEMPERATURE APPROXIMATELY IN THE RANGE OF 700* TO 1200*F. OVER THE SAID SURFACE OF METALLIC ALUMINUM, THEREBY REACTING THE IRON CHLORIDE WITH THE METALLIC ALUMINUM AND SO PRODUCING ADDITIONAL ALUMINUM CHLORIDE VAPORS AND SUBSTITUTING A DEPOSIT OF METALLIC IRON FOR THE METALLIC ALUMINUM; IN THE SECOND STAGE, PASSING ADDITIONAL VAPORS OF CONTAMINATED ALUMINUM CHLORIDE IN VAPOR FORM AT A TEMPERATURE APPROXIMATELY IN THE RANGE OF 1600* TO 2000* F. OVER THE DEPOSITED METALLIC IRON, THEREBY REACTING THE ALUMINUM CHLORIDE WITH THE METALLIC IRON AND SO PRODUCING ADDITIONAL IRON CHLORIDE VAPORS AND SUBSTITUTING A DEPOSIT OF METALLIC ALUMINUM FOR THE METALLIC IRON; ALTERNATELY REPEATING THE TWO-STAGES; SEPARATING THE VAPORS OF ALUMINUM CHLORIDE WHICH HAVE BEEN REACTED WITH METALLIC ALUMINUM FROM THOSE WHICH HAVE BEEN REACTED WITH METALLIC IRON AND SO SEPARATELY OBTAINING THE PURIFIED ALUMINUM CHLORIDE.
Claim 2
Dependent Claim
181 words
THE REPTITIVE TWO-STAGE CYCLIC PROCESS OF REMOVING IRON CHLORIDE FROM ANHYDROUS ALUMINUM CHLORIDE CONTAMINATED WITH THE SAME WHICH COMPRISES SETTING UP AN EXTENDED SURFACE OF METALLIC ALUMINUM ON AN INERT SUPPORTING MATERIAL; IN THE FIRST STAGE, PASSING THE CONTAMINATED ALUMINUM CHLORIDE IN VAPOR FORM AT A TEMPERATURE APPROXIMATELY IN THE RANGE OF 700* TO 1200*F. OVER THE SAID SURFACE OF METALLIC ALUMINUM, THEREBY REACTING THE IRON CHLORIDE WITH THE METALLIC ALUMINUM AND SO PRODUCING ADDITIONAL ALUMINUM CHLORIDE VAPORS AND SUBSTITUTING A DEPOSIT OF METALLIC IRON FOR THE METALLIC ALUMINUM; IN THE SECOND STAGE, PASSING ADDITIONAL VAPORS OF CONTAMINATED ALUMINUM CHLORIDE IN VAPOR FORM AT A TEMPERATURE APPROXIMATELY IN THE RANGE OF 1600* TO 2000* F. OVER THE DEPOSITED METALLIC IRON, THEREBY REACTING THE ALUMINUM CHLORIDE WITH THE METALLIC IRON AND SO PRODUCING ADDITIONAL IRON CHLORIDE VAPORS AND SUBSTITUTING A DEPOSIT OF METALLIC ALUMINUM FOR THE METALLIC IRON; ALTERNATELY REPEATING THE TWO-STAGES; SEPARATING THE VAPORS OF ALUMINUM CHLORIDE WHICH HAVE BEEN REACTED WITH METALLIC ALUMINUM FROM THOSE WHICH HAVE BEEN REACTED WITH METALLIC IRON AND SO SEPARATELY OBTAINING THE PURIFIED ALUMINUM CHLORIDE.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |