US3644113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomerate including graft copolymers of acylic acid and methyl cellulose and method of making
Assignee: International Minerals and Chemical Corp
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Filing: 1968-09-04
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Granted: 1972-02-22
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Expires: 1988-09-04
Abstract
Abstract Water-soluble graft copolymers of acrylic acid and methyl cellulose, including water-soluble salts thereof, are useful as binders in the agglomeration of finely divided materials. The graft copolymers are especially useful as binders in the pelletization of minerals and ores, such as taconite.
Inventors
- 👤 William J Lang
- 👤 Joseph M Chelini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:03
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C08; C08F; C08F251/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
62 words
A method in accordance with claim 1 wherein said graft copolymerization product is an ultraviolet light or peroxygen-type compound induced graft copolymerization product, and from about 0.002 to about 20 pounds of said graft copolymer per ton of said material and from zero to about 30 pounds of a bentonite clay per ton of said material is added to said wetted mass.
Claim 2
Dependent Claim
44 words
A method in accordance with claim 1 wherein said graft copolymerization product is a peroxide free radical induced graft copolymerization product, and said wetted mass contains from about 2 to about 20 percent by weight of water, based on the weight of said material.
Claim 3
Dependent Claim
30 words
A method in accordance with claim 3 wherein from about 0.2 to about 20 pounds of said graft copolymer per ton of said material is added to said wetted mass.
Claim 4
Dependent Claim
15 words
A method in accordance with claim 3 wherein said finely divided material is a mineral.
Claim 5
Dependent Claim
15 words
A method in accordance with claim 5 wherein said bentonite clay is a bentonitic clay.
Claim 6
Dependent Claim
15 words
A method in accordance with claim 5 wherein said bentonite clay is a subbentonitic clay.
Claim 7
Dependent Claim
18 words
A method in accordance with claim 7 wherein said bentonite clay is a soda ash treated subbentonitic clay.
Claim 8
Dependent Claim
30 words
A method in accordance with claim 5 wherein from about 0.5 to about 5 pounds of said graft copolymer per ton of said material is added to said wetted mass.
Claim 9
Dependent Claim
39 words
A method in accordance with claim 9 wherein said finely divided material is an iron ore and said wetted mass contains from about 5 to about 12 percent by weight of water, based on the weight of said material.
Claim 10
Dependent Claim
14 words
A method in accordance with claim 10 wherein said finely divided material is taconite.
Claim 11
Dependent Claim
47 words
A method in accordance with claim 10 wherein from about 0.002 to about 0.15 pound of said graft copolymer per ton of said material and from about 8 to about 30 pounds of a bentonitic clay per ton of said material is added to said wetted mass.
Claim 12
Dependent Claim
49 words
A method in accordance with claim 10 wherein from about 0.004 to about 0.15 pound of said graft copolymer per ton of said material and from about 12 to about 30 pounds of a soda ash-treated subbentonitic clay per ton of said material is added to said wetted mass.
Claim 13
Dependent Claim
23 words
A method in accordance with claim 10 wherein said finely divided material has a size of about 90 percent minus 325 mesh. 90
Claim 14
Dependent Claim
68 words
As a composition of matter, an agglomerate of finely divided material held together by a binder comprising a water-soluble graft copolymer or said graft copolymer and a bentonite clay, said graft copolymer being a graft copolymerization product of acrylic acid and from about 0.1 to about 10 percent, based on the weight of said acrylic acid, of methyl cellulose, or a water-soluble salt of said graft copolymerization product.
Claim 15
Dependent Claim
58 words
A composition of matter in accordance with claim 15 containing from about 0.002 to about 20 pounds of said graft copolymer per ton of said material and from about zero to about 30 pounds of said bentonite clay per ton of said material and said graft copolymerization product is an ultraviolet light or peroxygen-type compound graft copolymerization product.
Claim 16
Dependent Claim
46 words
A composition of matter in accordance with claim 16 wherein said graft copolymer is a peroxide free radical induced graft copolymerization product, and water in the amount of from about 5 to about 12 percent by weight, based on the weight of said material, is present.
Claim 17
Dependent Claim
18 words
A composition of matter in accordance with claim 17 wherein said finely divided material is an iron ore.
Claim 18
Dependent Claim
32 words
A composition of matter in accordance with claim 18 wherein said agglomerate is held together by from about 0.5 to about 5 pounds of said graft copolymer per ton of said material.
Claim 19
Dependent Claim
49 words
A composition of matter in accordance with claim 18 wherein said agglomerate is held together by from about 0.002 to about 0.15 pound of said graft copolymer per ton of said material and from about 8 to about 30 pounds of a bentonitic clay per ton of said material.
Claim 20
Dependent Claim
52 words
A composition of matter in accordance with claim 18 wherein said agglomerate is held together by from about 0.004 to about 0.15 pound of said graft copolymer per ton of said material and from about 12 to about 30 pounds of a soda ash treated subbentonitic clay per ton of said material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |