Patent US3860414A successfully refreshed from Google Patents.
US3860414A
Expired / Lapsed
US
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Use of graft copolymers as agglomeration binders
Assignee: International Minerals and Chemical Corp
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Filing: 1968-09-04
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Granted: 1975-01-14
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Expires: 1988-09-04
Abstract
Abstract Water-soluble graft copolymers of acrylic acid and a watersoluble polyhydroxy polymeric compound, 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
- 👤 John J Krajewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:33
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C08; C08F; C08F251/00
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
183 words
IN A METHOD OF AGGLOMERATING A WETTED MASS OF A FINELY DIVIDED MATERIAL, THE IMPROVEMENT WHICH COMPRISES THE STEP OF ADDING TO SAID WETTED MASS, PRIOR TO THE AGGLOMERATION THEREOF, AT LEAST A BINDING AMOUNT OF A WATER-SOBUBLE GRAFT COPOLYMER OR A MIXTURE OF 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 BY WEIGHT, BASED ON THE WEIGHT OF SAID ACRYLIC ACID, OF A POLYHYDROXY POLYMERIC COMPOUND, OR A WATER-SOLUBLE SALT OF SAID GRAFT COPOLYMERIZATION PRODUCT, SAID POLYHYDROXY POLYMERIC COMPOUND BEING OF THE GROUP CONSISTING OF: A. DERIVATIVES OF CELLULOSE OF THE GROUP CONSISTING OF CHLOROHYDROXYPROPYL CELLULOSE, PHENYLHYDROXYETHYL CELLULOSE, HYDROXYBUTYL CELLULOSE, HYDROXYETHYL CELLULOSE, ETHYL CELLULOSE, HYDROXYETHYL METHYL CELLULOSE, HYDROXYPROPYL METHYL CELLULOSE, AND CARBOXYMETHYL CELLULOSE, B. STARCH, C. DERIVATIVES OF STARCH OF THE GROUP CONSISTING OF CHLOROHYDROXYPROPYL STARCH, PHENYLHYDROXYETHYL STARCH, HYDROXYBUTYL STARCH, HYDROXETHYL STARCH, ETHYL STARCH, HYDROXYTEHYL METHYL STARCH, HYDROXYPROPYL METHYL STARCH, CARBOXYMETHYL STARCH, AND METHYL STARCH, D. SUGARS, E. CAUSTICIZED LIGNITE, F. BIOCHEMICALLY-SYNTHESIZED HETEROPOLYSACCHARIDES, G. POLYVINYL ALCOHOL, H. POLYALKYLENE GLYCOLS, AND I. ALKOXY POLYALKYLENE GLYCOLS.
Claim 2
Dependent Claim
183 words
IN A METHOD OF AGGLOMERATING A WETTED MASS OF A FINELY DIVIDED MATERIAL, THE IMPROVEMENT WHICH COMPRISES THE STEP OF ADDING TO SAID WETTED MASS, PRIOR TO THE AGGLOMERATION THEREOF, AT LEAST A BINDING AMOUNT OF A WATER-SOBUBLE GRAFT COPOLYMER OR A MIXTURE OF 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 BY WEIGHT, BASED ON THE WEIGHT OF SAID ACRYLIC ACID, OF A POLYHYDROXY POLYMERIC COMPOUND, OR A WATER-SOLUBLE SALT OF SAID GRAFT COPOLYMERIZATION PRODUCT, SAID POLYHYDROXY POLYMERIC COMPOUND BEING OF THE GROUP CONSISTING OF: A. DERIVATIVES OF CELLULOSE OF THE GROUP CONSISTING OF CHLOROHYDROXYPROPYL CELLULOSE, PHENYLHYDROXYETHYL CELLULOSE, HYDROXYBUTYL CELLULOSE, HYDROXYETHYL CELLULOSE, ETHYL CELLULOSE, HYDROXYETHYL METHYL CELLULOSE, HYDROXYPROPYL METHYL CELLULOSE, AND CARBOXYMETHYL CELLULOSE, B. STARCH, C. DERIVATIVES OF STARCH OF THE GROUP CONSISTING OF CHLOROHYDROXYPROPYL STARCH, PHENYLHYDROXYETHYL STARCH, HYDROXYBUTYL STARCH, HYDROXETHYL STARCH, ETHYL STARCH, HYDROXYTEHYL METHYL STARCH, HYDROXYPROPYL METHYL STARCH, CARBOXYMETHYL STARCH, AND METHYL STARCH, D. SUGARS, E. CAUSTICIZED LIGNITE, F. BIOCHEMICALLY-SYNTHESIZED HETEROPOLYSACCHARIDES, G. POLYVINYL ALCOHOL, H. POLYALKYLENE GLYCOLS, AND I. ALKOXY POLYALKYLENE GLYCOLS.
Claim 3
Dependent 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 0 to about 30 pounds of a bentonite clay per ton of said material is added to said wetted mass.
Claim 4
Dependent Claim
74 words
A method in accordance with claim 2 wherein said graft copolymerization product is a peroxide free radical induced graft copolymerization product of acrylic acid and from about 0.25 to about 5 percent by weight, based on the weight of said acrylic acid, of said derivative of cellulose or said biochemically-synthesized heteropolysaccharide, and said wetted mass contains from about 2 to about 20 percent by weight of water, based on the weight of said material.
Claim 5
Dependent Claim
13 words
A method in accordance with claim 3 wherein said material is a mineral.
Claim 6
Dependent Claim
15 words
A method in accordance with claim 4 wherein said bentonite clay is a bentonitic clay.
Claim 7
Dependent Claim
15 words
A method in accordance with claim 4 wherein said bentonite clay is a sub-bentonitic clay.
Claim 8
Dependent Claim
18 words
A method in accordance with claim 6 wherein said bentonite clay is a soda ash treated sub-bentonitic clay.
Claim 9
Dependent Claim
30 words
A method in accordance with claim 4 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 10
Dependent Claim
33 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, but no clay, is added to said wetted mass.
Claim 11
Dependent Claim
28 words
A method in accordance with claim 9 wherein said graft copolymerization product is a hydrogen peroxide or hydroperoxide induced graft copolymerization product of acrylic acid and carboxymethyl cellulose.
Claim 12
Dependent Claim
37 words
A method in accordance with claim 9 wherein said 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 13
Dependent Claim
12 words
A method in accordance with claim 11 wherein said material is taconite.
Claim 14
Dependent Claim
47 words
A method in accordance with claim 11 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 15
Dependent Claim
49 words
A method in accordance with claim 11 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 sub-bentonitic clay per ton of said material is added to said wetted mass.
Claim 16
Dependent Claim
22 words
A method in accordance with claim 11 wherein said finely divided material has a size of about 90 percent minus 325 mesh.
Claim 17
Dependent Claim
162 words
As a composition of matter, an agglomerate of finely divided material held together by a binder comprising a water-soluble graft copolymer or a mixture of 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 a polyhydroxy polymeric compound, or a water-soluble salt of said graft copolymerization product, said polyhydroxy polymeric compound being of the group consisting of: a. derivatives of cellulose of the group consisting of chlorohydroxypropyl cellulose, phenylhydroxyethyl cellulose, hydroxybutyl cellulose, hydroxyethyl cellulose, ethyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, and carboxymethyl cellulose, b. starch, c. derivatives of starch of the group consisting of chlorohydroxypropyl starch, phenylhydroxyethyl starch, hydroxybutyl starch, hydroxyethyl starch, ethyl starch, hydroxyethyl methyl starch, hydroxypropyl methyl starch, carboxymethyl starch, and methyl starch, d. sugars, e. causticized lignite, f. biochemically-synthesized heteropolysaccharides, g. polyvinyl alcohol, h. polyalkylene glycols, and i. alkoxy polyalkylene glycols.
Claim 18
Dependent Claim
162 words
As a composition of matter, an agglomerate of finely divided material held together by a binder comprising a water-soluble graft copolymer or a mixture of 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 a polyhydroxy polymeric compound, or a water-soluble salt of said graft copolymerization product, said polyhydroxy polymeric compound being of the group consisting of: a. derivatives of cellulose of the group consisting of chlorohydroxypropyl cellulose, phenylhydroxyethyl cellulose, hydroxybutyl cellulose, hydroxyethyl cellulose, ethyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, and carboxymethyl cellulose, b. starch, c. derivatives of starch of the group consisting of chlorohydroxypropyl starch, phenylhydroxyethyl starch, hydroxybutyl starch, hydroxyethyl starch, ethyl starch, hydroxyethyl methyl starch, hydroxypropyl methyl starch, carboxymethyl starch, and methyl starch, d. sugars, e. causticized lignite, f. biochemically-synthesized heteropolysaccharides, g. polyvinyl alcohol, h. polyalkylene glycols, and i. alkoxy polyalkylene glycols.
Claim 19
Dependent Claim
59 words
A composition of matter in accordance with claim 16 wherein said graft copolymerization product is an ultraviolet light or peroxygen-type compound graft copolymerization product, and containing from about 0.002 to about 20 pounds of said graft copolymer per ton of said material and from about 0 to about 30 pounds of said bentonite clay per ton of said material.
Claim 20
Dependent Claim
76 words
A composition of matter in accordance with claim 17 wherein said graft copolymer is a peroxide free radical induced graft copolymerization product of acrylic acid and from about 0.25 to about 5 percent by weight, based on the weight of said acrylic acid, of said derivative of cellulose or said biochemically-synthesized heteropolysaccharide, and water is present in the amount of from about 5 to about 12 percent by weight, based on the weight of said material.
Claim 21
Dependent Claim
18 words
A composition of matter in accordance with claim 18 wherein said finely divided material is an iron ore.
Claim 22
Dependent Claim
32 words
A composition of matter in accordance with claim 19 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 23
Dependent Claim
49 words
A composition of matter in accordance with claim 19 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 24
Dependent Claim
52 words
A composition of matter in accordance with claim 19 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 sub-bentonitic clay per ton of said material.
Claim 25
Dependent Claim
30 words
A composition oF matter in accordance with claim 19 wherein said graft copolymerization product is a hydrogen peroxide or hydroperoxide induced graft copolymerization product of acrylic acid and carboxymethyl cellulose.
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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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |