US3849537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying gases containing mercury vapour
Assignee: Boliden AB
•
Filing: 1972-02-23
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Granted: 1974-11-19
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Expires: 1992-02-23
Abstract
Abstract DRAWING 1. A METHOD FOR PURIFYING GASES CONTAINING GASEOUS ELEMENTARY MERCURY, COMPRISING: PREPARING A WASHING SOLUTION CONTAINING MERCURY (II) IONS IN A QUANTITY FROM 0.02 G./L. TO SATURATION LEVEL AND A QUANTITY OF AT LEAST ONE OF THE IONS SELECTED FROM THE GROUP C;-, BR-, I- AND SO4 2- WHICH FORM SPARINGLY SOLUBLE HG(I) SALTS, THE QUANTITY OF CL-, BR-, I- AND SO4 2- BEING SUFFICIENT TO ENABLE FORMED HG(I) TO PRECIPITATE OUT FROM THE SOLUTION BUT INSUFFICIENT TO CAUSE CORRESPONDING HG(I) SALTS TO BE DISPROPORTIONED TO HG(II) AND HGO, WASHING THE CONTAMINATED GAS WITH SAID SOLUTION.
Inventors
- 👤 T Allgulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:49
CPC Classifications
C; C22; C22B; C22B43/00; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/64; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/56; C01G; C01G13/00; C01G13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD FOR PURIFYING GASES CONTAINING GASEOUS ELEMENTARY MERCURY, COMPRISING: PREPARING A WASHING SOLUTION CONTAINING MERCURY (II) IONS IN A QUANTITY FROM 0.02 G./L. TO SATURATION LEVEL AND A QUANTITY OF AT LEAST ONE OF THE IONS SELECTED FROM THE GROUP C;-, BR-, I- AND SO4 2- WHICH FORM SPARINGLY SOLUBLE HG(I) SALTS, THE QUANTITY OF CL-, BR-, I- AND SO4 2- BEING SUFFICIENT TO ENABLE FORMED HG(I) TO PRECIPITATE OUT FROM THE SOLUTION BUT INSUFFICIENT TO CAUSE CORRESPONDING HG(I) SALTS TO BE DISPROPORTIONED TO HG(II) AND HGO, WASHING THE CONTAMINATED GAS WITH SAID SOLUTION.
Claim 2
Independent Claim
95 words
A METHOD FOR PURIFYING GASES CONTAINING GASEOUS ELEMENTARY MERCURY, COMPRISING: PREPARING A WASHING SOLUTION CONTAINING MERCURY (II) IONS IN A QUANTITY FROM 0.02 G./L. TO SATURATION LEVEL AND A QUANTITY OF AT LEAST ONE OF THE IONS SELECTED FROM THE GROUP C;-, BR-, I- AND SO4 2- WHICH FORM SPARINGLY SOLUBLE HG(I) SALTS, THE QUANTITY OF CL-, BR-, I- AND SO4 2- BEING SUFFICIENT TO ENABLE FORMED HG(I) TO PRECIPITATE OUT FROM THE SOLUTION BUT INSUFFICIENT TO CAUSE CORRESPONDING HG(I) SALTS TO BE DISPROPORTIONED TO HG(II) AND HGO, WASHING THE CONTAMINATED GAS WITH SAID SOLUTION.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |