US4793902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for electrolyzing zinc and apparatus therefor
Assignee: Tanaka Precious Metal Technologies Co Ltd
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Filing: 1988-03-04
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Granted: 1988-12-27
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Expires: 2008-03-04
Abstract
Abstract The present invention is a method and an apparatus for electrolyzing zinc. The method comprises vertically disposing a rotatable disk made of an electrically conductive metal functioning as a cathode at least of which an outer periphery has an insulation covering; immersing the lower portion of the disk into an electrolyte; disposing a circular arc shaped gas permeable electrode functioning as an anode to be closely opposed to the lower portion of the expressed portion of the both sides of the rotatable disk in the electrolyte; operating the electrolysis with the supply of hydrogen; and peeling off the zinc foil deposited onto the exposed portion of the both sides of the rotatable disk with rotation of the disk. This method can be modified by replacing the rotatable disk with a rotatable drum. The apparatus comprises a rotatable disk cathode made of an electrically conductive metal at least of which an outer periphery has an insulation covering and which is supported vertically and rotatably at the center of the electrolytic cell; a circular arc shaped gas permeable electrode functioning as an anode, and closely opposed to the lower portion of the both sides of the cathode, and fixed to the walls of the electrolytic cell; an electrolyte circulation path located at the desired portion of the anode; and a supply port and a discharge port for hydrogen located at the desired portion of the anodes. This apparatus can be modified by replacing the rotatable disk with a rotatable drum.
Inventors
- 👤 Nagakazu Furuya
- 👤 Satoshi Motoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:22
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/16; C25D; C25D1/00; C25D1/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A method for electrolyzing zinc which comprises vertically disposing a rotatable disk made of an electrically conductive metal functioning as a cathode at least of which an outer periphery has an insulation covering; immersing the lower portion of the disk into an electrolyte; disposing a circular arc shaped gas permeable electrode functioning as an anode to be closely opposed to the lower portion of the exposed portion of the both sides of the rotatable disk in the eletrolyte; operating the electrolysis with the supply of hydrogen; and peeling off the zinc foil deposited onto the exposed portion of the both sides of the rotatable disk with rotation of the disk.
Claim 2
Independent Claim
110 words
A method for electrolyzing zinc which comprises vertically disposing a rotatable disk made of an electrically conductive metal functioning as a cathode at least of which an outer periphery has an insulation covering; immersing the lower portion of the disk into an electrolyte; disposing a circular arc shaped gas permeable electrode functioning as an anode to be closely opposed to the lower portion of the exposed portion of the both sides of the rotatable disk in the eletrolyte; operating the electrolysis with the supply of hydrogen; and peeling off the zinc foil deposited onto the exposed portion of the both sides of the rotatable disk with rotation of the disk.
Claim 3
Dependent Claim
39 words
In a method claimed in claim 1, wherein the electrolyte contains one or more metal ions selected from the group consisting of ions of lead, cadmium, thallium, gallium, indium and mercury, in addition to the zinc and sulfuric acid.
Claim 4
Independent Claim
112 words
A method for electrolyzing zinc, which comprises forming the surface of an electrolytic cell by an anode of a semicircular gas permeable electrode; vertically and rotatably supporting a rotatable drum made of an electrically conductive metal and functioning as a cathode to the walls of the electrolytic cell, the both side surfaces of the drum having an insulation covering; adding an electrolyte to the electrolytic cell so that lower outer surface of the exposed portion of the cathode is immersed with the electrolyte; performing the electrolysis with hydrogen being supplied to the anode; and peeling off zinc foil disposed onto the outer surface of the rotatable drum with rotation of the drum.
Claim 5
Independent Claim
112 words
A method for electrolyzing zinc, which comprises forming the surface of an electrolytic cell by an anode of a semicircular gas permeable electrode; vertically and rotatably supporting a rotatable drum made of an electrically conductive metal and functioning as a cathode to the walls of the electrolytic cell, the both side surfaces of the drum having an insulation covering; adding an electrolyte to the electrolytic cell so that lower outer surface of the exposed portion of the cathode is immersed with the electrolyte; performing the electrolysis with hydrogen being supplied to the anode; and peeling off zinc foil disposed onto the outer surface of the rotatable drum with rotation of the drum.
Claim 6
Dependent Claim
39 words
In a method claimed in claim 3, wherein the electrolyte contains one or more metal ions selected from the group consisting of ions of lead, cadmium, thallium, gallium, indium and mercury, in addition to the zinc and sulfuric acid.
Claim 7
Independent Claim
105 words
An apparatus for electrolyzing zinc comprising a rotatable disk cathode made of an electrically conductive metal at least of which an outer periphery has an insulation covering and which is supported vertically and rotatably at the center of an electrolytic cell; a circular arc shaped gas permeable electrode functioning as an anode, and closely opposed to the lower portion of the both sides of the cathode, and fixed to the walls of the electrolytic cell; an electrolyte circulation path located at the desired portion of the anode; and a supply port and a discharge port for hydrogen located at the desired portion of the anodes.
Claim 8
Independent Claim
105 words
An apparatus for electrolyzing zinc comprising a rotatable disk cathode made of an electrically conductive metal at least of which an outer periphery has an insulation covering and which is supported vertically and rotatably at the center of an electrolytic cell; a circular arc shaped gas permeable electrode functioning as an anode, and closely opposed to the lower portion of the both sides of the cathode, and fixed to the walls of the electrolytic cell; an electrolyte circulation path located at the desired portion of the anode; and a supply port and a discharge port for hydrogen located at the desired portion of the anodes.
Claim 9
Independent Claim
85 words
An apparatus for electrolyzing zinc comprising an anode of a semicircular gas permeable electrode forming the bottom of an electrolytic cell; a cathode comprising a rotatable drum made of an electrically conductive metal, and vertically and rotatably and concentrically supported in the electrolytic cell, the outer surface of the cathode having an insulation covering; a supply port and a discharge port at the both ends of the electrolytic cell for supplying hydrogen to the anode; and an electrolyte discharge path equipped in the electrolytic cell.
Claim 10
Independent Claim
85 words
An apparatus for electrolyzing zinc comprising an anode of a semicircular gas permeable electrode forming the bottom of an electrolytic cell; a cathode comprising a rotatable drum made of an electrically conductive metal, and vertically and rotatably and concentrically supported in the electrolytic cell, the outer surface of the cathode having an insulation covering; a supply port and a discharge port at the both ends of the electrolytic cell for supplying hydrogen to the anode; and an electrolyte discharge path equipped in the electrolytic cell.
References Cited (Backward Citations)
US2944954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |