Patent US2686114A successfully refreshed from Google Patents.
US2686114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elimination of arsenic from metallic arsenide-sulfide concentrates
Assignee: Chemical Construction Corp
•
Filing: 1951-01-19
•
Granted: 1954-08-10
•
Expires: 1971-01-19
Abstract
No abstract record available.
Inventors
- 👤 Patrick J Mcgauley
- 👤 Felix A Schaufelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:11
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/04; C22B3/06; C22B3/08; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE REMOVAL OF ARSENIC FROM PARTICULATE SULFIDE-ARSENIDE ORE CONCENTRATES CONTAINING NONFERROUS METALS, SULFUR AND ARSENIC; THE PROCEDURE FOR ELIMINATING ARSENIC WHICH COMPRISES: ADMIXING THE PARTICLES WITH AN AQUEOUS SULFURIC ACID LEACH LIQUOR TO FORM A SLURRY, HEATING THE SLURRY AT A TEMPERATURE FROM ABOUT 250* F. TO ABOUT 650* F. AND UNDER A PRESSURE AT LEAST EQUAL TO THE VAPOR PRESSURE OF THE SLURRY AT THE REACTION TEMPERATURE WITH INTRODUCTION OF AN OXYGEN-CONTAINING GAS, AND CONTINUING THE HEATING UNTIL THE DISSOLUTION OF NON-FERROUS METALS IS SUBSTANTIALLY COMPLETE AND SUBSTANTIALLY ALL OF THE ARSENIC IS OXIDIZED, SAID AQUEOUS SULFURIC ACID LEACH LIQUOR HAVING AN ACID CONTENT GREATER THAN PH 4.5 BUT LESS THAN ABOUT 10% FREE ACID.
Claim 2
Dependent Claim
117 words
IN THE REMOVAL OF ARSENIC FROM PARTICULATE SULFIDE-ARSENIDE ORE CONCENTRATES CONTAINING NONFERROUS METALS, SULFUR AND ARSENIC; THE PROCEDURE FOR ELIMINATING ARSENIC WHICH COMPRISES: ADMIXING THE PARTICLES WITH AN AQUEOUS SULFURIC ACID LEACH LIQUOR TO FORM A SLURRY, HEATING THE SLURRY AT A TEMPERATURE FROM ABOUT 250* F. TO ABOUT 650* F. AND UNDER A PRESSURE AT LEAST EQUAL TO THE VAPOR PRESSURE OF THE SLURRY AT THE REACTION TEMPERATURE WITH INTRODUCTION OF AN OXYGEN-CONTAINING GAS, AND CONTINUING THE HEATING UNTIL THE DISSOLUTION OF NON-FERROUS METALS IS SUBSTANTIALLY COMPLETE AND SUBSTANTIALLY ALL OF THE ARSENIC IS OXIDIZED, SAID AQUEOUS SULFURIC ACID LEACH LIQUOR HAVING AN ACID CONTENT GREATER THAN PH 4.5 BUT LESS THAN ABOUT 10% FREE ACID.
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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |