Patent US4028216A successfully refreshed from Google Patents.
US4028216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing an alumina sol
Assignee: Universal Oil Products Co
•
Filing: 1975-05-30
•
Granted: 1977-06-07
•
Expires: 1995-05-30
Abstract
Abstract A stoichiometric amount of aluminum is commingled with hydrochloric acid in an aqueous media to provide a final reaction mixture containing from about 10 to about 14 wt. % aluminum in from about a 1:1 to about 1.5:1 ratio with the chloride anion content thereof. The mixture is treated in the presence of a soluble salt of cobalt or nickel at conditions effecting substantially complete digestion of the aluminum.
Inventors
- 👤 Edward Michalko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:40
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0047; B01J37/00; B01J37/02; B01J37/03; B01J37/031; C; C01; C01F; C01F7/00; C01F7/02; C01F7/42; C01F7/428
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A method of producing an alumina sol which comprises commingling a stoichiometric amount of aluminum with hydrochloric acid in an aqueous media to provide a final reaction mixture containing from about 10 to about 14 wt. % aluminum in from about a 1:1 to about a 1.5:1 ratio with the chloride anion content thereof, and treating the reaction mixture in the presence of from about 0.05 to about 0.5 wt. % cobalt chloride or nickel chloride based on the weight of said aluminum reactant at a reflux temperature of from about 98° C to about 115° C to effect substantially complete digestion of said aluminum.
Claim 2
Independent Claim
105 words
A method of producing an alumina sol which comprises commingling a stoichiometric amount of aluminum with hydrochloric acid in an aqueous media to provide a final reaction mixture containing from about 10 to about 14 wt. % aluminum in from about a 1:1 to about a 1.5:1 ratio with the chloride anion content thereof, and treating the reaction mixture in the presence of from about 0.05 to about 0.5 wt. % cobalt chloride or nickel chloride based on the weight of said aluminum reactant at a reflux temperature of from about 98° C to about 115° C to effect substantially complete digestion of said aluminum.
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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |