US3713776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic mercury monitor
Assignee: Olin Corp
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Filing: 1970-09-28
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Granted: 1973-01-30
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Expires: 1990-09-28
Abstract
Abstract Apparatus and method for analyzing fluid streams for their content of elemental and ionic mercury even in the presence of other contaminants, for example, elemental or available chlorine. The sample is automatically measured and treated with aqueous stannous chloride reagent. The resulting elemental mercury is transferred to a photometric detector and the results are indicated and/or recorded automatically, accurately and rapidly. The apparatus and method are especially useful in the control of mercury contamination in the environment and also for monitoring chemical process streams.
Inventors
- 👤 I Capuano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:35
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G01N33/0013; G01N33/0027; G01N33/0036; G01N33/0045
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
181 words
Apparatus for monitoring a fluid for the content of mercury present therein which comprises: a. programming means for mechanically activating and deactivating successively and repetitively: b. means for removing from a fluid a sample of predetermined amount and for transferring said sample to a scrubbing zone; c. means for circulating aqueous stannous chloride reagent cyclically from a reagent storage zone through a reagent valve and through a reagent measuring zone and return to said reagent storage zone; d. means for removing from said circulating reagent a predetermined amount of said aqueous reagent and for transferring said amount of aqueous reagent to said scrubbing zone; e. means for scrubbing the mixture in said scrubbing zone with a gaseous carrier; f. means for separating said gaseous carrier containing mercury vapor from the resulting aqueous liquid in said scrubbing zone; g. means for transferring said carrier containing mercury vapor to a measuring zone; h. photometric means for measuring the quantity of mercury in said carrier; i. means for indicating the quantity of mercury in said carrier relative to the predetermined amount of said sample.
Claim 2
Dependent Claim
181 words
Apparatus for monitoring a fluid for the content of mercury present therein which comprises: a. programming means for mechanically activating and deactivating successively and repetitively: b. means for removing from a fluid a sample of predetermined amount and for transferring said sample to a scrubbing zone; c. means for circulating aqueous stannous chloride reagent cyclically from a reagent storage zone through a reagent valve and through a reagent measuring zone and return to said reagent storage zone; d. means for removing from said circulating reagent a predetermined amount of said aqueous reagent and for transferring said amount of aqueous reagent to said scrubbing zone; e. means for scrubbing the mixture in said scrubbing zone with a gaseous carrier; f. means for separating said gaseous carrier containing mercury vapor from the resulting aqueous liquid in said scrubbing zone; g. means for transferring said carrier containing mercury vapor to a measuring zone; h. photometric means for measuring the quantity of mercury in said carrier; i. means for indicating the quantity of mercury in said carrier relative to the predetermined amount of said sample.
Claim 3
Dependent Claim
39 words
Apparatus as claimed in claim 1 further including means for admixing and proportioning gaseous cArrier with said predetermined amount of aqueous reagent and for transferring the resulting mixture of said aqueous reagent and said carrier to said scrubbing zone.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |