US4019898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of ilmenite ore
Assignee: Kerr McGee Chemical Corp
•
Filing: 1976-04-30
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Granted: 1977-04-26
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Expires: 1996-04-30
Abstract
Abstract A small amount of sulfate ion is added to the hydrochloric acid leach liquor used to beneficiate ilmenite ore whereby fines or slime formation in the mother liquor is minimized or reduced and the color of the solid beneficiated ilmenite product is lighter.
Inventors
- 👤 James H. Chen
- 👤 Lewis W. Huntoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:07
CPC Classifications
C; C22; C22B; C22B1/00; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1213; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
In a process for the beneficiation of ilmenite ore wherein the ilmenite ore is leached with a hydrochloric acid leach liquor to provide a mother liquor containing acid-soluble iron contaminant values and acid-insoluble titanium values and these values are subsequently separated from one another to yield a solid beneficiated ilmenite product, the improvement which comprises leaching the ilmenite ore with a stoichiometric excess of the hydrochloric acid leach liquor containing added sulfate ion in a small amount of from about 0.5% to about 2.5% of the weight of the ilmenite ore, whereby fines or slime formation in the mother liquor is minimized and the color of the solid beneficiated ilmenite product is lighter.
Claim 2
Dependent Claim
113 words
In a process for the beneficiation of ilmenite ore wherein the ilmenite ore is leached with a hydrochloric acid leach liquor to provide a mother liquor containing acid-soluble iron contaminant values and acid-insoluble titanium values and these values are subsequently separated from one another to yield a solid beneficiated ilmenite product, the improvement which comprises leaching the ilmenite ore with a stoichiometric excess of the hydrochloric acid leach liquor containing added sulfate ion in a small amount of from about 0.5% to about 2.5% of the weight of the ilmenite ore, whereby fines or slime formation in the mother liquor is minimized and the color of the solid beneficiated ilmenite product is lighter.
Claim 3
Dependent Claim
19 words
The process as defined by claim 1 wherein the sulfate ion is added in the form of sulfuric acid.
Claim 4
Dependent Claim
24 words
The process as defined by claim 1 wherein the sulfate ion is added in the form of at least one ionizable inorganic sulfate salt.
Claim 5
Dependent Claim
16 words
The process as defined by claim 3 wherein the ionizable inorganic sulfate salt is calcium sulfate.
Claim 6
Dependent Claim
65 words
The process as defined by claim 1 wherein the leaching is conducted in more than one stage, the amount of added sulfate ion in the first stage is from about 0.5% to about 1.5% of the weight of the ilmenite ore and the amount of added sulfate ion in the other stages is from 0% to about 1% of the weight of the ilmenite ore.
Claim 7
Dependent Claim
38 words
The process as defined by claim 1 wherein the ilmenite ore is a high fines-forming ilmenite ore normally producing more than about 6% by weight fines or slime based on the TiO 2 content of the ilmenite ore.
Claim 8
Dependent Claim
40 words
The process as defined by claim 1 wherein the ilmenite ore is a medium fines-forming ilmenite ore normally producing from about 3% to about 6% by weight fines or slime based on the TiO 2 content of the ilmenite ore.
Claim 9
Dependent Claim
38 words
The process as defined by claim 1 wherein the ilmenite ore is a low fines-forming ilmenite ore normally producing less than about 3% by weight fines or slime based on the TiO 2 content of the ilmenite ore.
References Cited (Backward Citations)
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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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |