Patent US4278610A successfully refreshed from Google Patents.
US4278610A
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Method of making an organic metal salt or complex
Assignee: National Research Laboratories
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Filing: 1979-12-20
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Granted: 1981-07-14
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Expires: 1999-12-20
Abstract
Abstract A method of making an organic metal salt or complex is disclosed by reacting a heavy metal hydroxide with an organic Lewis acid or salt thereof in the presence of a gaseous catalyst such as a form of CO 2 . The reaction may be controlled by the addition of a buffering agent. Other gaseous catalysts such as CO and SO 2 or their related salts, can be employed. The method produces organic metal complexes or salts in a pure second salt-free state either in a solution or solid state.
Inventors
- 👤 Gerald L. Maurer
- 👤 Virginia E. Stefanini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:02
CPC Classifications
C; C07; C07F; C07F11/00; C07F11/005; C07C; C07C323/00; C07C51/00; C07C51/41; C07C51/412; C07F1/00; C07F1/005; C07F5/00; C07F5/06; C07F5/069
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
36 words
Method of making an organic metal salt or complex comprising reacting a heavy metal hydroxide with an organic Lewis acid, or salt thereof, in an aqueous reaction medium and in the presence of a gaseous catalyst.
Claim 2
Dependent Claim
36 words
Method of making an organic metal salt or complex comprising reacting a heavy metal hydroxide with an organic Lewis acid, or salt thereof, in an aqueous reaction medium and in the presence of a gaseous catalyst.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said catalyst is a form of CO 2 .
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein said reaction is conducted in a buffered acidic medium.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said catalyst is volatilized from the reaction.
Claim 6
Dependent Claim
18 words
The method of claim 1 selected from the group of CO 2 , CO and SO 2 .
Claim 7
Dependent Claim
58 words
Method of making an organic metal salt or complex comprising reacting a heavy metal hydroxide with an organic Lewis acid, or salt thereof, in an aqueous reaction medium and in the presence of a gaseous catalyst comprising a form of CO 2 selected from the group consisting of carbonic acid, bicarbonate, carbonate and carbon dioxide, and mixtures thereof.
Claim 8
Dependent Claim
58 words
Method of making an organic metal salt or complex comprising reacting a heavy metal hydroxide with an organic Lewis acid, or salt thereof, in an aqueous reaction medium and in the presence of a gaseous catalyst comprising a form of CO 2 selected from the group consisting of carbonic acid, bicarbonate, carbonate and carbon dioxide, and mixtures thereof.
Claim 9
Dependent Claim
28 words
The method of claim 6 wherein said heavy metal hydroxide is mixed with a heavy metal salt of carbonic acid which provides said form of CO 2 .
Claim 10
Dependent Claim
19 words
The method of claim 7 comprising the further step of adding a form of CO 2 to the reaction.
Claim 11
Dependent Claim
13 words
The method of claim 6 which includes retaining CO 2 during the reaction.
Claim 12
Dependent Claim
17 words
The method of claim 6 with the further addition of a buffering agent to control the reaction.
Claim 13
Dependent Claim
20 words
The method of claim 6 conducted to obtain the organic metal complex or salt in a pure second salt-free state.
Claim 14
Dependent Claim
18 words
The method of claim 6 wherein said pure form is isolated by direct crystallization to a pure solid.
Claim 15
Dependent Claim
27 words
The method of claim 6 wherein said heavy metal is selected from the group consisting of zinc, nickel, chromium, bismuth, mercury, silver, copper, magnesium, aluminium and cobalt.
Claim 16
Dependent Claim
25 words
The method of claim 6 wherein said organic Lewis acid is selected from the group consisting of an organic acid and a substituted organic acid.
Claim 17
Dependent Claim
22 words
The method of claim 14 wherein said substituted organic acid is selected from the group consisting of hydroxypolycarboxylic, aminopolycarboxylic, sulfhydropolycarboxylic and phosphenolpolycarboxylic.
Claim 18
Dependent Claim
22 words
The method of claim 6 wherein the product of the reaction is a dialkali metal monoheavy metal chelate of an alpha-hydroxypolycarboxylic acid.
Claim 19
Dependent Claim
14 words
The method of claim 16 wherein said chelate is a dialkali metal monocopper(II) citrate.
Claim 20
Dependent Claim
12 words
The method of claim 17 wherein said chelate is in aqueous admixture.
Claim 21
Dependent Claim
11 words
The method of claim 17 wherein said chelate is a solid.
Claim 22
Independent Claim
65 words
A method of making an organic metal complex or salt in a second salt-free state comprising providing an aqueous reaction medium containing an organic Lewis acid solution containing a heavy metal hydroxide, adding a gaseous catalyst selected from the group of CO 2 , SO 2 and CO, and retaining said gaseous catalyst until said reaction is substantially complete to provide said second salt-free product.
Claim 23
Independent Claim
65 words
A method of making an organic metal complex or salt in a second salt-free state comprising providing an aqueous reaction medium containing an organic Lewis acid solution containing a heavy metal hydroxide, adding a gaseous catalyst selected from the group of CO 2 , SO 2 and CO, and retaining said gaseous catalyst until said reaction is substantially complete to provide said second salt-free product.
Claim 24
Dependent Claim
24 words
The method of claim 20 wherein a heavy metal salt of carbonic acid provides said gaseous catalyst comprising a form of CO 2 .
Claim 25
Dependent Claim
23 words
The method of claim 21 wherein the heavy metal hydroxide and carbonic acid salt are provided in the reaction medium as mixed salts.
Claim 26
Dependent Claim
15 words
The method of claim 20 wherein a buffering agent is added to control the reaction.
Claim 27
Dependent Claim
21 words
The method of claim 20 wherein said Lewis acid is selected from the group consisting of hydroxypolycarboxylic, aminopolycarboxylic, sulfhydropolycarboxylic, and phosphenolpolycarboxylic.
Claim 28
Dependent Claim
24 words
The method of claim 20 wherein said Lewis acid is selected from the group consisting of citric acid, gluconic acid, and 1-naphthol-3, 6-disulfonic acid.
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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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |