Patent US2291675A successfully refreshed from Google Patents.
Patent US3896013A successfully refreshed from Google Patents.
US3896013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing metallic ions from an electrolytic solution
Assignee: Industrial Filter and Pump Manufacturing Co
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Filing: 1974-02-25
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Granted: 1975-07-22
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Expires: 1994-02-25
Abstract
Abstract The present invention relates in general to a new and improved process and apparatus for removing metallic ions from an electrolytic solution, and it relates more particularly to a process and apparatus which may be used to economically purify an electrolytic solution containing only minute amounts of metallic ions. Those knowledgable in the metal plating art will readily understand the application of this process and apparatus for the final treatment of metal finishing waste fluids. As is explained more fully hereinafter, the process and apparatus of the present invention is also effective in removing organic compounds and phosphates from the electrolytic solution under treatment.
Inventors
- 👤 James F Zievers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:05
CPC Classifications
C; C25; C25D; C25D21/00; C25D21/16; C25D21/18; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/46104; C02F1/46109; C02F1/46114; C02F1/467; C02F1/4676; C02F1/4678; C02F2001/46119; C02F2001/46152; C02F2001/46157; C02F2001/46161; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4611; C02F2201/4612; C02F2201/4615; C02F2201/4616; C02F2201/4617
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A PROCESS FOR REMOVING METAL IONS FROM A SOLUTION, COMPRISING THE STEPS OF DEPOSITION A POROUS CAKE OF CARBON PARTICLES ON A FORAMINOUS SUBSTRATE BY FLOWING A LIQUID IN WHICH SAID PARTICLES ARE ENTRAINED THROUGH SAID SUBSTRATE, AND PASSING SAID SOLUTION THROUGH SAID CAKE AND SAID SUBSTRATE WHILE MAINTAINING SAID CAKE AT A NEGATIVE ELECTRIC POTENTIAL RELATIVE TO AN ANODE IMMERSED IN SAID SOLUTION IN SPACED RELATIONSHIP TO SAID CAKE, WHEREBY SAID METAL IONS ARE DEPOSITED ON THE SURFACES OF SAID PARTICLES.
Claim 2
Dependent Claim
82 words
A PROCESS FOR REMOVING METAL IONS FROM A SOLUTION, COMPRISING THE STEPS OF DEPOSITION A POROUS CAKE OF CARBON PARTICLES ON A FORAMINOUS SUBSTRATE BY FLOWING A LIQUID IN WHICH SAID PARTICLES ARE ENTRAINED THROUGH SAID SUBSTRATE, AND PASSING SAID SOLUTION THROUGH SAID CAKE AND SAID SUBSTRATE WHILE MAINTAINING SAID CAKE AT A NEGATIVE ELECTRIC POTENTIAL RELATIVE TO AN ANODE IMMERSED IN SAID SOLUTION IN SPACED RELATIONSHIP TO SAID CAKE, WHEREBY SAID METAL IONS ARE DEPOSITED ON THE SURFACES OF SAID PARTICLES.
Claim 3
Dependent Claim
38 words
The process according to claim 1 comprising the further step of mixing carbon particles with said solution prior to the passage thereof through said cake to apply fresh carbon particles to said cake during the metal removal process.
Claim 4
Dependent Claim
20 words
The process according to claim 1 wherein said carbon particles are activated to remove other nonmetalic material from said solution.
Claim 5
Dependent Claim
13 words
The process according to claim 3 wherein said carbon particles are steam activated.
Claim 6
Dependent Claim
42 words
The process according to claim 1 comprising the further step of replacing said cake by interrupting the flow of said solution through said cake, removing said cake from said substrate, and then depositing a cake of fresh carbon particles on said substrate.
Claim 7
Dependent Claim
12 words
The process according to claim 1 wherein said particles are carbon powder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |