US3959093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum hydrates and salts of carboxylic acids
Assignee: Individual
•
Filing: 1974-05-13
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Granted: 1976-05-25
•
Expires: 1994-05-13
Abstract
Abstract Aluminum salts of a carboxylic acid selected from the group consisting of ascorbic acid, acetic acid, and citric acid are formed by contacting the carboxylic acid with activated aluminum. The activated aluminum is formed by combining highly pure aluminum with another metal which has an affinity for hydrogen in the presence of a proton source. Typically, the other metal can be gallium and the proton source can be hydrochloric acid. Included in the aluminum salts which can be formed are polymeric aluminum salts.
Inventors
- 👤 George G. Merkl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:12
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
A method of preparing an aluminum-carboxylic acid compound which comprises: reacting by contacting, in the presence of water: a. activated aluminum comprising high purity metallic aluminum permeated with a metal selected from mercury, indium, gallium and alloys of indium and gallium; with b. a carboxylic acid selected from acetic acid, ascorbic acid and citric acid; whereby the aluminum of said activated aluminum is consumed in reaction with said carboxylic acid, thereby forming said aluminum-carboxylic acid compound.
Claim 2
Independent Claim
76 words
A method of preparing an aluminum-carboxylic acid compound which comprises: reacting by contacting, in the presence of water: a. activated aluminum comprising high purity metallic aluminum permeated with a metal selected from mercury, indium, gallium and alloys of indium and gallium; with b. a carboxylic acid selected from acetic acid, ascorbic acid and citric acid; whereby the aluminum of said activated aluminum is consumed in reaction with said carboxylic acid, thereby forming said aluminum-carboxylic acid compound.
Claim 3
Dependent Claim
18 words
The method of claim 1, wherein said aluminum has a purity of at least about 99.99% by weight.
Claim 4
Dependent Claim
34 words
The method of claim 1, wherein said activated aluminum and carboxylic acid are reacted in the presence of an excess of water, based upon the water of crystallization of the formed aluminum-carboxylic acid compound.
Claim 5
Dependent Claim
16 words
The method of claim 3, wherein the reaction is carried out at room temperature or below.
Claim 6
Dependent Claim
16 words
The method of claim 3, wherein the pH of the reaction medium is less than 4.2.
Claim 7
Dependent Claim
28 words
The method of claim 1, wherein the activated aluminum comprises highly pure aluminum permeated with from 1 to 3% by weight of an alloy of indium and gallium.
References Cited (Backward Citations)
US535464A
Cited
US1427011A
Cited
US1863254A
Cited
US2042019A
Cited
US2275211A
Cited
US3578439A
Cited
US3574607A
Cited
US3856841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |