US3859210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of heavy metals from aqueous solutions
Assignee: Individual
•
Filing: 1971-07-19
•
Granted: 1975-01-07
•
Expires: 1991-07-19
Abstract
Abstract Heavy metals dissolved in aqueous streams are removed by contacting the aqueous stream with a polyelectrolyte in the presence of particule matter, allowing the heavy metal to be bound to the particulate matter and separating the particulate matter containing the heavy metal from the aqueous stream, thereby purifying it.
Inventors
- 👤 Asa E Hatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:18
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5272; C02F1/54
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
18 words
A PROCESS FOR REMOVING MERCURY FROM AQUEOUS STREAMS HAVING DISSOLVED THEREIN MERCURY IN IONIC OR COMPOUND FORM COMPRISING
Claim 2
Dependent Claim
18 words
A PROCESS FOR REMOVING MERCURY FROM AQUEOUS STREAMS HAVING DISSOLVED THEREIN MERCURY IN IONIC OR COMPOUND FORM COMPRISING
Claim 3
Dependent Claim
32 words
CONTACTING THE AQUEOUS STREAM WITH A POLYELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF A POLYALKYLENE POLYAMINE AND POLYETHYLENIMINE AND PARTICULATE MATTER SELECTED FROM THE GROUP CONSISTING OF A BENTONITE CLAY AND SAND,
Claim 4
Dependent Claim
32 words
CONTACTING THE AQUEOUS STREAM WITH A POLYELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF A POLYALKYLENE POLYAMINE AND POLYETHYLENIMINE AND PARTICULATE MATTER SELECTED FROM THE GROUP CONSISTING OF A BENTONITE CLAY AND SAND,
Claim 5
Dependent Claim
11 words
ALLOWING THE MERCURY TO BE BOUND TO THE PARTICULATE MATTER, AND
Claim 6
Dependent Claim
11 words
ALLOWING THE MERCURY TO BE BOUND TO THE PARTICULATE MATTER, AND
Claim 7
Dependent Claim
10 words
The process of claim 1 wherein mercury ions are removed.
Claim 8
Dependent Claim
11 words
allowing the mercury to be bound to the particulate matter, and
Claim 9
Dependent Claim
11 words
allowing the mercury to be bound to the particulate matter, and
Claim 10
Dependent Claim
11 words
allowing the mercury to be bound to the bentonite clay, and
Claim 11
Dependent Claim
11 words
allowing the mercury to be bound to the bentonite clay, and
Claim 12
Dependent Claim
14 words
separating by filtration the bentonite clay containing the aqueous mercury from the aqueous stream.
Claim 13
Dependent Claim
14 words
separating by filtration the bentonite clay containing the aqueous mercury from the aqueous stream.
Claim 14
Dependent Claim
11 words
separating the particulate matter containing the mercury from the aqueous stream.
Claim 15
Dependent Claim
11 words
separating the particulate matter containing the mercury from the aqueous stream.
Claim 16
Dependent Claim
19 words
The process of claim 1 wherein the concentration of the mercury is not in excess of about 2 p.p.m.
Claim 17
Dependent Claim
11 words
SEPARATING THE PARTICULATE MATTER CONTAINING THE MERCURY FROM THE AQUEOUS STREAM.
Claim 18
Dependent Claim
11 words
SEPARATING THE PARTICULATE MATTER CONTAINING THE MERCURY FROM THE AQUEOUS STREAM.
Claim 19
Dependent Claim
10 words
The process of claim 1 wherein the polyelectrolyte is polyethylenimine.
Claim 20
Dependent Claim
22 words
The process of claim 1 wherein mercury ion is removed from an aqueous stream using a polyalkylene polyamine and a bentonite clay.
Claim 21
Dependent Claim
16 words
A process for removing mercury from aqueous streams having dissolved therein mercury in ionic form comprising
Claim 22
Dependent Claim
16 words
A process for removing mercury from aqueous streams having dissolved therein mercury in ionic form comprising
Claim 23
Dependent Claim
19 words
The process of claim 6 wherein the concentration of the mercury is not in excess of about 2 p.p.m.
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |