Patent US3766035A successfully refreshed from Google Patents.
US3766035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating metals from waste water
Assignee: Mitsui Kinzoku Co Ltd
•
Filing: 1972-09-06
•
Granted: 1973-10-16
•
Expires: 1992-09-06
Abstract
Abstract A method of separating metals contained in the waste water, which comprises the processes: the electrolysis of the waste water is conducted by adding an organic solvent and a nonionic surface active agent capable of emulsifying said organic solvent to the waste water containing such metals as Cd, Zn, Pb, Cu, Ni, Fe, Cr, Mn, Hg, Al, etc.; and the solid matters formed by the said electrolysis are made to float to be separated.
Inventors
- 👤 M Ichiki
- 👤 M Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:31
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/465; C02F1/463; C02F2101/00; C02F2101/10; C02F2101/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
A method as defined in claim 1, wherein said organic solvent is at least one member selected from the group consisting of toluene, xylene, mineral spirit and solvent naphtha.
Claim 2
Dependent Claim
41 words
A method as defined in claim 1, wherein the quantity of said nonionic surface active agent necessary for emulsifying said organic solvent is from 0.5 to 50 grams per one m3 of the waste water to that of the organic solvent.
Claim 3
Dependent Claim
49 words
A method as defined in claim 1, wherein Said nonionic surface active agent is at least one member selected from the group consisting of polyoxyethylene alkyl ether, polyoxyethylene phenol ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene acylester, sorbitan fatty acid ester, oxyethylene -oxypropylene block polymer, and fatty acid monoglyceride.
References Cited (Backward Citations)
US1131067A
Cited
US3247103A
Cited
US3350292A
Cited
US3479281A
Cited
US3523891A
Cited
US3664951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |