Patent US3006724A successfully refreshed from Google Patents.
US3006724A
Expired / Lapsed
US
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Preparation of aluminum hydroxy fluoride
Assignee: Dow Chemical Co
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Filing: 1959-04-10
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Granted: 1961-10-31
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Expires: 1979-04-10
Abstract
No abstract record available.
Inventors
- 👤 Bob R Harrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:06
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR THE PREPARATION OF ALF2OH, WHICH COMPRISES INTERMIXING AN AQUEOUS SOLUTION OF ALUMINUM CHLORIDE WITH PARTICULATED CALCIUM FLUORIDE TO REACT THE ALUMINUM CHLORIDE WITH THE CALCIUM FLUORIDE TO OBTAIN CALCIUM CHLORIDE AND ALUMINUM CHLOROFLUORIDE IN A RESULTING SOLUTION, SEPARATING THE UNDISSOLVED CONSTITUENTS OF THE REACTED MASS FROM THE RESULTING SOLUTION, ADJUSTING THE PH OF THE SEPARATED SOLUTION TO A PH IN THE RANGE OF 1.2 TO 4, INTERMIXING WITH THE PH ADJUSTED SOLUTION AN ALUMINUM OXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE ACTIVE FORM OF ALUMINUM OXIDE AND ALUMINUM HYDROXIDE, HEATING THE RESULTING MIXTURE TO A TEMPERATURE OF 40* TO 90*C. TO REACT THE ALUMINUM CHLOROFLUORIDE TO OBTAIN A PRECIPITATE OF ALF2OH, AND RECOVERING THE ALF2OH FROM THE REACTED MASS.
Claim 2
Dependent Claim
124 words
A PROCESS FOR THE PREPARATION OF ALF2OH, WHICH COMPRISES INTERMIXING AN AQUEOUS SOLUTION OF ALUMINUM CHLORIDE WITH PARTICULATED CALCIUM FLUORIDE TO REACT THE ALUMINUM CHLORIDE WITH THE CALCIUM FLUORIDE TO OBTAIN CALCIUM CHLORIDE AND ALUMINUM CHLOROFLUORIDE IN A RESULTING SOLUTION, SEPARATING THE UNDISSOLVED CONSTITUENTS OF THE REACTED MASS FROM THE RESULTING SOLUTION, ADJUSTING THE PH OF THE SEPARATED SOLUTION TO A PH IN THE RANGE OF 1.2 TO 4, INTERMIXING WITH THE PH ADJUSTED SOLUTION AN ALUMINUM OXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE ACTIVE FORM OF ALUMINUM OXIDE AND ALUMINUM HYDROXIDE, HEATING THE RESULTING MIXTURE TO A TEMPERATURE OF 40* TO 90*C. TO REACT THE ALUMINUM CHLOROFLUORIDE TO OBTAIN A PRECIPITATE OF ALF2OH, AND RECOVERING THE ALF2OH FROM THE REACTED MASS.
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) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |