US3855387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing mercury from industrial gases
Assignee: Manufacturers Hanover Trust Co
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Filing: 1973-09-05
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Granted: 1974-12-17
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Expires: 1993-09-05
Abstract
Abstract Mercury is removed from sulfur dioxide containing industrial gases preparatory to catalytic oxidation of the sulfur dioxide by admixing hydrogen sulfide with the gas and thereafter subjecting the gas to a suspended solids removal operation.
Inventors
- 👤 J Fitzsimmons
- 👤 C Brockmiller
- 👤 R Lund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:31
CPC Classifications
C; C22; C22B; C22B43/00; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/64
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
34 words
THE METHOD OF REMOVING MECURY FROM SULFUR DIOXIDE CONTAINING INDUSTRIAL GAS PREPARATORY TO CATALYTIC OXIDIATION OF THE SULFUR DIOXIDE COMPRISES ADMIXING HYDROGEN SULFIDE WITH THE GAS AND THEREAFTER SUBJECTING THE GAS TO A SUSPENDED
Claim 2
Independent Claim
34 words
THE METHOD OF REMOVING MECURY FROM SULFUR DIOXIDE CONTAINING INDUSTRIAL GAS PREPARATORY TO CATALYTIC OXIDIATION OF THE SULFUR DIOXIDE COMPRISES ADMIXING HYDROGEN SULFIDE WITH THE GAS AND THEREAFTER SUBJECTING THE GAS TO A SUSPENDED
Claim 3
Dependent Claim
30 words
The method of removing mercury from sulfur dioxide containing industrial gas as defined in claim 1 wherein the suspended solids removal operation includes passing the gas through a coke filter.
Claim 4
Dependent Claim
30 words
The method of removing mercury from sulfur dioxide containing industrial gas as defined in claim 1 wherein the suspended solid removal operation includes passing the gas through an electrical precipitator.
Claim 5
Dependent Claim
41 words
The method of removing mercury from sulfur dioxide containing industrial gas as defined in claim 1 wherein the amount of hydrogen sulfide added to the gas is equivalent to at least one molecule to each atom of mercury in the gas.
References Cited (Backward Citations)
US3661509A
Cited
US3786619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |