Patent US5732192A successfully refreshed from Google Patents.
Patent US3744630A successfully refreshed from Google Patents.
US3744630A
Expired / Lapsed
US
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Kaolin flotation process
Assignee: Thiele Kaolin Co
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Filing: 1970-11-02
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Granted: 1973-07-10
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Expires: 1990-11-02
Abstract
Abstract Titanium mineral impurities are removed from Kaolin by forming an acidic dispersion of Kaolin, water and dispersing agent (acidic relative to the flotation pH), adding a collector to the dispersion, conditioning the acidic dispersion, raising the pH by the addition of reagent to the dispersion, subjecting the dispersion to a froth flotation step and recovering the Kaolin having a reduced titanium mineral impurity content.
Inventors
- 👤 S Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:50
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06; B03D1/001; B03D1/002; B03D1/004; B03D1/008; B03D2201/00; B03D2201/007; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
20 words
A method as described in claim 1, wherein an activator is added to the slurry prior to the conditioning step.
Claim 2
Dependent Claim
13 words
A method as described in claim 2, wherein said activator is lead acetate.
Claim 3
Dependent Claim
24 words
A method as described in claim 3, wherein from about 0.5 to about 1 pound of lead acetate per ton of clay is used.
Claim 4
Dependent Claim
33 words
A method as described in claim 1, wherein said conditioned clay slurry is diluted to a solids content of from about 15 to 25 percent by weight prior to the froth flotation process.
Claim 5
Dependent Claim
22 words
A method as described in claim 1, wherein the aqueous slurry contains at least 40 percent solids prior to the conditioning step.
Claim 6
Dependent Claim
23 words
A method as described in claim 1, wherein from about 0.4 to 20 pounds per ton of said anionic oleophilic collector is used.
Claim 7
Dependent Claim
14 words
A method as described in claim 7, wherein the collector is a fatty acid.
Claim 8
Dependent Claim
13 words
A method as described in claim 8, wherein said collector is tall oil.
Claim 9
Dependent Claim
23 words
A method as described in claim 9, wherein from about 1 to 6 pounds of tall oil per ton of clay is used.
Claim 10
Dependent Claim
24 words
A method as described in claim 1, wherein the pH of the slurry is raised to at least 9 prior to said flotation step.
Claim 11
Dependent Claim
16 words
A method as described in claim 11, wherein ammonium hydroxide is used to raise the pH.
Claim 12
Dependent Claim
100 words
In an improved method of flotation to remove titanium mineral impurities from kaolin comprising mixing clay in the form of an aqueous slurry wiTh sufficient alkali to raise the pH to at least about 8.0, a deflocculant, and a collector, conditioning the slurry by intense agitation, introducing the conditioned slurry into a froth flotation cell, and subjecting the conditioned aqueous slurry to a froth flotation process, the improvement comprising performing at least a major portion of said conditioning of said slurry at a pH of from about 3.5 to less than about 7.0, prior to the addition of said alkali.
Claim 13
Dependent Claim
25 words
A method as described in claim 13, wherein said conditioning step follows the addition of said collector, but prior to the addition of said alkali.
Claim 14
Dependent Claim
20 words
A method as described in claim 13, wherein said slurry contains at least 40 percent solids during said conditioning step.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |