US3849267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering mercury from a gas containing mercury vapor
Assignee: Akzo NV
•
Filing: 1973-03-05
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Granted: 1974-11-19
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Expires: 1993-03-05
Abstract
Abstract A process for recovering mercury from a mercury-containing gas which includes mixing chlorine with the gas, then passing the mixture through a gas-permeable bed of a non-porous solid material which has a large surface area in relation to the bed volume to collect necessary chloride thereon and thereafter recovering the mercury by either washing the bed with chlorine containing brine and passing the resulting mercury-containing brine to an electrolysis cell with a mercury cathode or dissolving the bed material in an aqueous process stream and passing the stream to an electrolysis cell with a mercury cathode.
Inventors
- 👤 H Hilgen
- 👤 C Rekers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:49
CPC Classifications
C; C01; C01G; C01G13/00; C01G13/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A PROCESS FOR RECOVERING MERCURY FROM A MERCURYCONTAINING GAS COMPRISING MIXING THE GAS WITH CHLORINE AND SUBSEQUENTLY PASSING THE MIXTURE AT A TEMPERATURE UP TO 80*C THROUGH A GAS-PERMEABLE BED OF NON-POROUS SOLID MATERIAL PRESENTING A TOTAL EXTERNAL SURFACE AREA AMOUNTING TO AT LEAST 20 M2 PER M3 BED VOLUME WHICH COLLECTS THE MERCURY AS A MERCURY CHLORIDE.
Claim 2
Dependent Claim
58 words
A PROCESS FOR RECOVERING MERCURY FROM A MERCURYCONTAINING GAS COMPRISING MIXING THE GAS WITH CHLORINE AND SUBSEQUENTLY PASSING THE MIXTURE AT A TEMPERATURE UP TO 80*C THROUGH A GAS-PERMEABLE BED OF NON-POROUS SOLID MATERIAL PRESENTING A TOTAL EXTERNAL SURFACE AREA AMOUNTING TO AT LEAST 20 M2 PER M3 BED VOLUME WHICH COLLECTS THE MERCURY AS A MERCURY CHLORIDE.
Claim 3
Dependent Claim
17 words
The process according to claim 1 in which the bed at least partially consists of glass wool.
Claim 4
Dependent Claim
20 words
The process according to claim 1 in which the bed at least partially consists of preformed bodies of common salt.
Claim 5
Dependent Claim
32 words
The process according to claim 1, in which the material is so arranged in the bed as to present an increase in external surface area in the direction of the gas flow.
Claim 6
Dependent Claim
19 words
The process according to claim 1, including mixing the gas with chlorine immediately before or upon entering the bed.
Claim 7
Dependent Claim
41 words
The process according to claim 1, including washing the bed containing water-insoluble solid material after having become loaded with mercury chloride with a chlorine containing brine and passing the resulting mercury containing brine to an electrolysis cell with a mercury cathode.
Claim 8
Dependent Claim
40 words
The process according to claim 3, including dissolving the solid common salt content of the bed after having become loaded with mercury chloride in an aqueous process stream and passing the stream to an electrolysis cell with a mercury cathode.
References Cited (Backward Citations)
GB1121845A
Cited
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 |