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US3760066A
Expired / Lapsed
US
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Process for preparing aluminum trichloride
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1972-03-31
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Granted: 1973-09-18
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Expires: 1992-03-31
Abstract
Abstract Aluminium chloride is prepared by the action of chlorine and carbon on alumina previously heated for 1 to 2 hours at 700* to 1,000* C with improvement in chlorine yield and the maintenance of an exothermic reaction.
Inventors
- 👤 B Calcagno
- 👤 L Piccolo
- 👤 M Ghirga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:21
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01F7/58; C01F7/60; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
16 words
A method as claimed in claim 1, employing alumina:carbon weight ratios of from 3:1 to 4:1.
Claim 2
Dependent Claim
29 words
A method as claimed in claim 1, in which the alumina and carbon as used in the form of particles having a diameter of 0.3 mm. to 0.8 mm.
Claim 3
Dependent Claim
23 words
A method as claimed in claim 1, in which the contact times in relation to the chlorine lie between 5 and 20 seconds.
Claim 4
Dependent Claim
10 words
The method of claim 1, wherein said carbon is coke.
Claim 5
Dependent Claim
21 words
The method of claim 1, where said formation of aluminum trichloride is at a working temperature of 900* to 950* C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |