US4597797A
Expired / Lapsed
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Composition of matter useful for agglomerating a metal-containing ore material
Assignee: Akzo NV
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Filing: 1982-08-16
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Granted: 1986-07-01
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Expires: 2002-08-16
Abstract
Abstract A composition of matter is disclosed which is useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition comprising an alkali metal salt of carboxymethyl cellulose and one or more salts derived from an alkali metal and a weak acid having a pK value higher than 3 and a molecular weight lower than 500 in an amount of at least 2%, calculated on the weight of the alkali metal salt of carboxymethyl cellulose. The alkali metal salts of weak acids are preferably those derived from acetic acid, benzoic acid, lactic acid, propionic acid, tartaric acid, succinic acid, citric acid, nitrous acid, boric acid and carbonic acid.
Inventors
- 👤 Herm J. Roorda
- 👤 Max J. Jipping
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:14
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
A composition of matter useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition consisting essentially of an alkali metal salt of carboxymethyl cellulose and one or more salts derived from an alkali metal and a weak acid having a pK value higher than 3 and a molecular weight lower than 500, in an amount of at least 2%, calculated on the weight of the alkali metal salt of carboxymethyl cellulose, said composition being essentially free of polyvalent metal salts as well as acid ingredients which cause carbon dioxide to evolve from sodium carbonate.
Claim 2
Dependent Claim
109 words
A composition of matter useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition consisting essentially of an alkali metal salt of carboxymethyl cellulose and one or more salts derived from an alkali metal and a weak acid having a pK value higher than 3 and a molecular weight lower than 500, in an amount of at least 2%, calculated on the weight of the alkali metal salt of carboxymethyl cellulose, said composition being essentially free of polyvalent metal salts as well as acid ingredients which cause carbon dioxide to evolve from sodium carbonate.
Claim 3
Dependent Claim
94 words
A composition of matter useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition consisting essentially of an alkali metal salt of carboxymethyl cellulose and one or more salts derived from an alkali metal and carbonic acid, in an amount of at least 2%, calculated on the weight of the alkali metal salt of carboxymethyl cellulose, said composition being essentially free of polyvalent metal salts as well as acid ingredients which cause carbon dioxide to evolve from sodium carbonate.
Claim 4
Dependent Claim
94 words
A composition of matter useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition consisting essentially of an alkali metal salt of carboxymethyl cellulose and one or more salts derived from an alkali metal and carbonic acid, in an amount of at least 2%, calculated on the weight of the alkali metal salt of carboxymethyl cellulose, said composition being essentially free of polyvalent metal salts as well as acid ingredients which cause carbon dioxide to evolve from sodium carbonate.
Claim 5
Dependent Claim
84 words
A composition of matter useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition consisting essentially of an alkali metal salt of carboxymethyl cellulose and sodium carbonate in a amount of at least 2% calculated on the weight of the alkali metal salt of carboxymethyl cellulose, said composition being essentially free of polyvalent metal salts as well as acid ingredients which cause carbon dioxide to evolve from sodium carbonate.
Claim 6
Dependent Claim
84 words
A composition of matter useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition consisting essentially of an alkali metal salt of carboxymethyl cellulose and sodium carbonate in a amount of at least 2% calculated on the weight of the alkali metal salt of carboxymethyl cellulose, said composition being essentially free of polyvalent metal salts as well as acid ingredients which cause carbon dioxide to evolve from sodium carbonate.
Claim 7
Dependent Claim
96 words
A composition of matter useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition consisting essentially of an alkali metal salt of carboxymethyl cellulose and sodium carbonate, said composition being essentially free of polyvalent metal salts as well as acid ingredients which cause carbon dioxide to evolve from sodium carbonate, and having been prepared from a previously prepared solids mixture containing 25-95 percent by weight of the alkali metal salt of carboxymethyl cellulose and 5-75 percent by weight of sodium carbonate.
Claim 8
Dependent Claim
96 words
A composition of matter useful for agglomerating a metal-containing ore material in the presence of water and an alkali metal salt of carboxymethyl cellulose as a binder, the composition consisting essentially of an alkali metal salt of carboxymethyl cellulose and sodium carbonate, said composition being essentially free of polyvalent metal salts as well as acid ingredients which cause carbon dioxide to evolve from sodium carbonate, and having been prepared from a previously prepared solids mixture containing 25-95 percent by weight of the alkali metal salt of carboxymethyl cellulose and 5-75 percent by weight of sodium carbonate.
Claim 9
Dependent Claim
52 words
The composition of claim 1 wherein the alkali metal salt of carboxymethyl cellulose is combined with one or more salts selected from the group consisting of an alkali metal salt of acetic acid, benzoic acid, lactic acid, propionic acid, tartaric acid, succinic acid, citric acid, nitrous acid, boric acid and carbonic acid.
Claim 10
Dependent Claim
28 words
The composition of claim 1 wherein the alkali metal salt of carboxymethyl cellulose has a degree of substitution of 0.4-1.0 and an average degree of polymerization of 300-1700.
Claim 11
Dependent Claim
17 words
The composition of claim 1 wherein the alkali metal salt of carboxymethyl cellulose is sodium carboxymethyl cellulose.
Claim 12
Dependent Claim
25 words
The composition of claim 1 wherein the alkali metal salt of carboxymethyl cellulose is combined with one or more alkali metal salts of citric acid.
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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |