Patent US3649243A successfully refreshed from Google Patents.
US3649243A
Expired / Lapsed
US
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Beneficiating iron-containing titaniferous material
Assignee: British Titan Products Co Ltd
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Filing: 1970-07-31
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Granted: 1972-03-14
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Expires: 1990-07-31
Abstract
Abstract A process for the beneficiation of iron-containing titaniferous material by a preliminary oxidation and reduction before leaching with aqueous hydrochloric acid wherein the leaching is carried out in two stages, in one stage with acid containing dissolved titanium and in the other stage with fresh acid.
Inventors
- 👤 Frank Ronald Williams
- 👤 Jack Whitehead
- 👤 Jefferson Marshall
- 👤 Alan Conners
- 👤 Derek Vernon Gosden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:14
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
30 words
A process as claimed in claim 1 wherein the finely divided iron-containing material has an average mean weight partiCle size in the range of about 50 to 300 Mu .
Claim 2
Dependent Claim
20 words
A process as claimed in claim 2 wherein the particle size is in the range 100 to 200 Mu .
Claim 3
Dependent Claim
29 words
A process as claimed in claim 1 wherein the finely divided iron-containing titaniferous material is heated under oxidizing conditions to a temperature in the range 850* to 950* C.
Claim 4
Dependent Claim
29 words
A process as claimed in claim 1 wherein the finely divided, iron-containing titaniferous material is heated under reducing conditions to a temperature in the range 600* to 1,100* C.
Claim 5
Dependent Claim
22 words
A process as claimed in claim 5 wherein the material is heated to a temperature in the range 700* to 900* C.
Claim 6
Dependent Claim
26 words
A process as claimed in claim 1 wherein the reduced material is first leached with aqueous hydrochloric acid containing dissolved titanium and secondly with fresh acid.
Claim 7
Dependent Claim
30 words
A process as claimed in claim 1 wherein the titanium-containing aqueous hydrochloric acid contains an amount of titanium in the range 0.01 to 2 percent by weight expressed as TiO2.
Claim 8
Dependent Claim
28 words
A process as claimed in claim 8 wherein the amount of titanium, expressed as TiO2, in the acid is in the range 0.2 to 2 percent by weight.
Claim 9
Dependent Claim
34 words
A process as claimed in claim 1 wherein sufficient aqueous hydrochloric acid is used to provide a 20 to 30 percent stoichiometric excess based on the iron content of the material to be leached.
Claim 10
Dependent Claim
28 words
A process as claimed in claim 1 wherein the leaching is carried out at a temperature in the range 80* C. to the boiling point of the acid.
Claim 11
Dependent Claim
30 words
A process as claimed in claim 1 in which the oxidized and reduced material is leached, in at least one stage, for a period of from 30 to 300 minutes.
Claim 12
Dependent Claim
30 words
A process as claimed in claim 1 wherein fresh acid, after leaching, is used as the titanium-containing acid for leaching a subsequent quantity of oxidized and reduced iron-containing titaniferous material.
Claim 13
Dependent Claim
22 words
A process as claimed in claim 1 wherein the aqueous hydrochloric acid contains from 18 to 22 percent by weight of HCl.
Claim 14
Dependent Claim
28 words
A process as claimed in claim 1 wherein the titaniferous material is agitated, during leaching, by passing a suitable gas through the suspension of solids in the liquid.
Claim 15
Dependent Claim
21 words
A process as claimed in claim 1 wherein the acid is passed upwardly through a column of titaniferous material during leaching.
Claim 16
Dependent Claim
15 words
A process as claimed in claim 16 wherein the acid is recycled through the column.
References Cited (Backward Citations)
US2183365A
Cited
US2406577A
Cited
US2758019A
Cited
US3105755A
Cited
US3193376A
Cited
US3457037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |