US3950182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment process
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1974-11-18
•
Granted: 1976-04-13
•
Expires: 1994-11-18
Abstract
Abstract Minerals, including metal ores, fillers and coal, are ground with a grinding aid which is an ionic polysaccharide, particularly sodium carboxymethyl cellulose.
Inventors
- 👤 Margaret Lilian Steel
- 👤 Frank Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:13
CPC Classifications
B; B02; B02C; B02C23/00; B02C23/06
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
20 words
A mineral comminution process which comprises comminuting the mineral in the presence of a liquid medium comprising an ionic polysaccharide.
Claim 2
Dependent Claim
20 words
A mineral comminution process which comprises comminuting the mineral in the presence of a liquid medium comprising an ionic polysaccharide.
Claim 3
Dependent Claim
14 words
A process according to claim 1 in which the polysaccharide is a carboxylated polysaccharide.
Claim 4
Dependent Claim
25 words
A process according to claim 2 in which the polysaccharide has from 1 to 5 carbon atoms between the carboxyl group and the hexose ring.
Claim 5
Dependent Claim
25 words
A process according to claim 1 in which from 5 to 90% of the hydroxyl groups in the polysaccharide are substituted with an ionic grouping.
Claim 6
Dependent Claim
22 words
A process according to claim 4 in which from 10 to 50% of the hydroxyl groups are substituted with an ionic grouping.
Claim 7
Dependent Claim
19 words
A process according to claim 1 in which the polysaccharide is a cellulose, starch, pectate, alginate or a carraghenate.
Claim 8
Dependent Claim
18 words
A process according to claim 6 in which the polysaccharide is an alkali metal salt of carboxymethyl cellulose.
Claim 9
Dependent Claim
21 words
A process according to claim 7 in which the molecular weight of the carboxy methyl cellulose is from 1000 to 1,000,000.
Claim 10
Dependent Claim
16 words
A process according to claim 8 in which the molecular weight is from 5,000 to 300,000.
Claim 11
Dependent Claim
26 words
A process according to claim 1 in which the polysaccharide is present in the proportion of 0.005% to 5% of the dry weight of the mineral.
Claim 12
Dependent Claim
26 words
A process according to claim 10 in which the polysaccharide is present in the proportion of 0.01% to 2% of the dry weight of the mineral.
Claim 13
Dependent Claim
13 words
A process according to claim 1 in which the liquid medium is polar.
Claim 14
Dependent Claim
13 words
A process according to claim 12 in which the liquid medium comprises water.
Claim 15
Dependent Claim
14 words
A process according to claim 1 in which the mineral is an inorganic material.
Claim 16
Dependent Claim
14 words
A process according to claim 14 in which the mineral is a metal ore.
Claim 17
Dependent Claim
14 words
A process according to claim 1 in which the mineral is an organic material.
Claim 18
Dependent Claim
12 words
A process according to claim 16 in which the mineral is coal.
Claim 19
Dependent Claim
24 words
A process according to claim 1 in which the mineral forms from 50 to 90% by weight of the total solid and liquid weight.
Claim 20
Dependent Claim
13 words
A dry particulate composition comprising a comminuted mineral material and an ionic polysaccharide.
Claim 21
Dependent Claim
13 words
A dry particulate composition comprising a comminuted mineral material and an ionic polysaccharide.
Claim 22
Dependent Claim
24 words
A composition according to claim 19 in which the polysaccharide is selected from the group consisting of a cellulose, starch, pectate, alginate and carraghenate.
Claim 23
Dependent Claim
18 words
A composition according to claim 20 in which the polysaccharide is an alkali metal salt of carboxymethyl cellulose.
Claim 24
Dependent Claim
14 words
A composition according to claim 21 in which the polysaccharide is sodium carboxymethyl cellulose.
Claim 25
Dependent Claim
30 words
A method of transporting a mineral which comprises comminuting the mineral by the process of claim 1 and conveying the resulting slurry comprising the mineral and ionic polysaccharide by pipeline.
Claim 26
Dependent Claim
14 words
A mineral slurry comprising a comminuted mineral and anionic polysaccharide in a liquid medium.
Claim 27
Dependent Claim
14 words
A mineral slurry comprising a comminuted mineral and anionic polysaccharide in a liquid medium.
Claim 28
Dependent Claim
18 words
A slurry according to claim 24 in which the polysaccharide is an alkali metal salt of carboxymethyl cellulose.
References Cited (Backward Citations)
US2346151A
Cited
US3325105A
Cited
US3295766A
Cited
US3443976A
Cited
US3442673A
Cited
US3607326A
Cited
US3767750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |