US2982613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous titaniferous iron material digestion process utilizing concentrated sulfuric acid, a foaming agent and water
Assignee: NL Industries Inc
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Filing: 1959-02-16
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Granted: 1961-05-02
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Expires: 1979-02-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:03
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A CONTINUOUS METHOD FOR DIGESTING A TITANIFEROUS IRON MATERIAL SELECTED FROM THE GROUP CONSISTING OF A TITANIFEROUS ORE, ORE CONXENTRATE AND SLAG TO RENDER THE IRON AND TITANIUM VALUES SOLUBLE IN AQUEOUS MEDIA WHICH COMPRISES: FORMING A MIXTURE OF SAID TITANIFEROUS IRON MATERIAL, CONCENTRATED SULFURIC ACID, A FOAMING AGENT AND WATER, SAID WATER BEING ADDED TO INITIATE THE REACTION BETWEEN THE TITANIFEROUS IRON MATERIAL AND THE CONCENTRATED ACID, SAID FOAMING AGENT EMPLOYED BEING AN NALKYL TRIETHYLENE DIAMINE WHEREIN THE ALKYL GROUP IS DERIVED FROM A FATTY ACID HAVING FROM 12 TO 18 CARBON ATOMS, SAID FOAMING AGENT BEING PRESENT IN AN AMOUNT IN THE MIXTURE SUFFICIENT TO FORM A HEAVY FOAM WHICH HOLDS IN SUSPENSION SUBSTANTIALLY ALL OF THE REACTANTS AND THE DIGESTION REACTION PRODUCTS IN SAID FOAM, SAID FOAMING AGENT BEING STABLE DURING THE DIGESTION REACTION IN ORDER TO SUSPEND THE REACTANTS AND THE REACTION PRODUCTS, CONTINUALLY ADDING MORE OF SAID TITANIFEROUS MATERIAL,
Claim 2
Dependent Claim
154 words
A CONTINUOUS METHOD FOR DIGESTING A TITANIFEROUS IRON MATERIAL SELECTED FROM THE GROUP CONSISTING OF A TITANIFEROUS ORE, ORE CONXENTRATE AND SLAG TO RENDER THE IRON AND TITANIUM VALUES SOLUBLE IN AQUEOUS MEDIA WHICH COMPRISES: FORMING A MIXTURE OF SAID TITANIFEROUS IRON MATERIAL, CONCENTRATED SULFURIC ACID, A FOAMING AGENT AND WATER, SAID WATER BEING ADDED TO INITIATE THE REACTION BETWEEN THE TITANIFEROUS IRON MATERIAL AND THE CONCENTRATED ACID, SAID FOAMING AGENT EMPLOYED BEING AN NALKYL TRIETHYLENE DIAMINE WHEREIN THE ALKYL GROUP IS DERIVED FROM A FATTY ACID HAVING FROM 12 TO 18 CARBON ATOMS, SAID FOAMING AGENT BEING PRESENT IN AN AMOUNT IN THE MIXTURE SUFFICIENT TO FORM A HEAVY FOAM WHICH HOLDS IN SUSPENSION SUBSTANTIALLY ALL OF THE REACTANTS AND THE DIGESTION REACTION PRODUCTS IN SAID FOAM, SAID FOAMING AGENT BEING STABLE DURING THE DIGESTION REACTION IN ORDER TO SUSPEND THE REACTANTS AND THE REACTION PRODUCTS, CONTINUALLY ADDING MORE OF SAID TITANIFEROUS MATERIAL,
References Cited (Backward Citations)
US2767053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |