US3193376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of ilmenite
Assignee: Wah Chang Corp
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Filing: 1961-12-04
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Granted: 1965-07-06
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Expires: 1981-12-04
Abstract
No abstract record available.
Inventors
- 👤 Lo Ching-Lung
- 👤 Thomas S Mackey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:43
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1213; C22B1/00; C22B1/02; C22B1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
IN THE BENEFICIATION OF ILMENITIC ORE, A TWO STEP PROCESS FOR EFFECTING THE SELECTIVE AND PREFERENTIAL DISSOLUTION OF UNDESIRED ACID-SOLUBLE NON-TITANIFEROUS VALUES THEREIN COMPRISING THE STEP OF FIRST SUBJECTIG SAID ORE TO THE LEACHING ACTION OF A MIXED ACID SOLUTION FORMED OF SECOND STAGE LEACH LIQUOR AND SUFFICIENT ADDITIONAL FRESH HYDROCHLORIC ACID OF AT LEAST 20* BE, STRENGTH TO PROVIDE ABOUT 60% OF THE STOICHIOMETRIC AMOUNT REQUIRED FOR DISSOLUTION OF SAID UNDESIRED ACID-SOLUBLE NONTITANIFEROUS VALUES THERIN TO EFFECT PREFERENTIAL DISSOLUTION OF SAID ACID-SOLUBLE NON-TITANIFEROUS VALUES AND TO MINIMIZE THE DISSOLUTION OF TITANIFEROUS VALUES THEREIN, THEN SUBJECTING THE LEACHED RESIDUE OF SAID FIRST STAGE LEACHING OPERATION TO A SECOND STAGE LEACHING ACTION OF FRESH HYDROCHLORIC ACID OF AT LEAST 20* BE. STRENGTH IN AN AMOUNT CONSTITUTED TO PROVIDE ABOUT A 50% EXCESS OVER THE STOICHIOMETRIC AMOUNT THEREOF REQUIRED FOR DISSOLUTION OF THE REMAINING UNDESIRED ACID-SOLUBLE NONTITANIFEROUS VALUES IN SAID FIRST STAGE LEACHED RESIDUE AND MAINTAINING THE TEMPERATURE OF THE LEACH LIQUID AT LEAST 105*C. DURING THE MAJOR PORITN OF SAID FIRST AND SECOND STAGE LEACHING OPERATIONS.
Claim 2
Dependent Claim
175 words
IN THE BENEFICIATION OF ILMENITIC ORE, A TWO STEP PROCESS FOR EFFECTING THE SELECTIVE AND PREFERENTIAL DISSOLUTION OF UNDESIRED ACID-SOLUBLE NON-TITANIFEROUS VALUES THEREIN COMPRISING THE STEP OF FIRST SUBJECTIG SAID ORE TO THE LEACHING ACTION OF A MIXED ACID SOLUTION FORMED OF SECOND STAGE LEACH LIQUOR AND SUFFICIENT ADDITIONAL FRESH HYDROCHLORIC ACID OF AT LEAST 20* BE, STRENGTH TO PROVIDE ABOUT 60% OF THE STOICHIOMETRIC AMOUNT REQUIRED FOR DISSOLUTION OF SAID UNDESIRED ACID-SOLUBLE NONTITANIFEROUS VALUES THERIN TO EFFECT PREFERENTIAL DISSOLUTION OF SAID ACID-SOLUBLE NON-TITANIFEROUS VALUES AND TO MINIMIZE THE DISSOLUTION OF TITANIFEROUS VALUES THEREIN, THEN SUBJECTING THE LEACHED RESIDUE OF SAID FIRST STAGE LEACHING OPERATION TO A SECOND STAGE LEACHING ACTION OF FRESH HYDROCHLORIC ACID OF AT LEAST 20* BE. STRENGTH IN AN AMOUNT CONSTITUTED TO PROVIDE ABOUT A 50% EXCESS OVER THE STOICHIOMETRIC AMOUNT THEREOF REQUIRED FOR DISSOLUTION OF THE REMAINING UNDESIRED ACID-SOLUBLE NONTITANIFEROUS VALUES IN SAID FIRST STAGE LEACHED RESIDUE AND MAINTAINING THE TEMPERATURE OF THE LEACH LIQUID AT LEAST 105*C. DURING THE MAJOR PORITN OF SAID FIRST AND SECOND STAGE LEACHING OPERATIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |