WO1998024950A1 - Elektrolysezelle mit bipolaren elektroden - Google Patents
Elektrolysezelle mit bipolaren elektroden Download PDFInfo
- Publication number
- WO1998024950A1 WO1998024950A1 PCT/EP1997/006505 EP9706505W WO9824950A1 WO 1998024950 A1 WO1998024950 A1 WO 1998024950A1 EP 9706505 W EP9706505 W EP 9706505W WO 9824950 A1 WO9824950 A1 WO 9824950A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cathode side
- electrolyte
- anode side
- electrode
- electrolytic cell
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/036—Bipolar electrodes
Definitions
- the invention relates to an electrolytic cell with an electrolyte and a plurality of bipolar electrodes surrounded by the electrolyte, which are electrically connected in series during operation of the cell, each of the bipolar electrodes having a cathode side and an anode side, between which an electrically conductive connection during operation consists.
- the object is achieved according to the invention in that at least one bipolar electrode has a cathode side and an anode side which are designed to be movable relative to one another.
- the cathode side and the anode side are no longer mechanically inseparable, but can be moved more or less against each other.
- the distance between the two electrode sides can thereby be changed in the desired manner, and in particular one of the two electrode sides can be removed from the cell in this way while the other electrode side remains in the cell.
- One, several or all of the bipolar electrodes of the cell are designed to be separable so that it is possible to pull either the cathode side or the anode side of a bipolar electrode out of the electrolyte and to leave the other side in the cell.
- the independent mobility of an electrode side and the ability to separate bipolar electrodes can be used in various ways. If the electrolysis cell is used to separate a solid, the solid separates on the cathode side or the anode side, depending on the substance and electrolyte, during the operation of the cell. The electrode side with the deposited product can, regardless of the other electrode side withdrawn from the cell, freed of the separated product and returned to the cell. Another possible application is to carry out a galvanic coating on one electrode side and to remove the coated electrode side from the cell. An electrode side can also be removed from the cell for maintenance and, if necessary, also replaced.
- This, albeit slight, voltage ensures that the metal is deposited on a bipolar electrode only on the desired area and not simultaneously on another surface of the same bipolar electrode.
- Metals that are removed from the electrolyte and deposited on the cathode side of the bipolar electrodes are e.g. B. copper, zinc, cobalt or nickel.
- Mn0 2 can e.g. B. deposit on the anode side, using a sulfuric acid manganese (II) sulfate solution as the electrolyte.
- an advantageous embodiment is that the electrical connection between the cathode side and the anode side of the separable bipolar electrode has a touch contact.
- This touch contact causes an electrical current to flow within the bipolar electrode between the cathode side and the anode side during cell operation. Since the two electrode sides on the contact only touch and not z. B. are screwed together, the parts can be easily separated mechanically. It is possible to increase the contact pressure of the contact surfaces in the area of the contact by clamping action. In general, however, it is sufficient to use the weight of the movable electrode part for the pressure in the area of the contact. A good current flow in the area of the contact is generally ensured by the fact that electrically conductive metals such as copper or silver touch there.
- the contact between two electrode parts can be arranged outside the electrolyte or in the electrolyte.
- the touch contact may be on or near the cell rim where it is easily accessible and can be easily monitored.
- the touch contact can also be arranged in the electrolyte, e.g. B. near the bottom of the cell container.
- the electrolyte advantageously provides cooling for the contact area.
- the bipolar electrodes in which the cathode or anode side is designed to be movable and detachable, can be formed in various ways. Plates made of lead, titanium or graphite are particularly suitable for the anode side, and it can also be activated expanded metal.
- the anode side can also be designed as a gas diffusion anode, with a gas supply being provided. Sheets or plates also come for the cathode.
- B. made of titanium, stainless steel or graphite.
- the cathode side can have a network or grid structure. Furthermore, it can be designed as a box with perforated walls, the z. B. with Coal granulate is filled. Another possibility is to design the cathode side as a gas diffusion cathode and to provide a gas supply.
- the cathode and anode sides of the electrodes can e.g. B. in vertical grooves of the container inner walls.
- care will be taken to ensure that little or no electrolyte flows laterally between the inner wall of the container and the electrodes.
- the distance between the container bottom and the lower edge of the electrodes will usually be in the range of 3 to 30 mm, and the lateral distance between the container wall and the electrodes is usually between 0 and 5 mm.
- the bipolar electrode makes it z. B. in metal deposition, the area of the deposition can be limited in a simple manner by simply aligning and influencing the electric field.
- One way of influencing this is to arrange a partition between the cathode side and the anode side of the separable bipolar electrode.
- this partition must be designed and arranged in such a way that it does not completely prevent the flow of the electrolyte.
- FIG. 1 is a vertical longitudinal section along the line I-I in Fig. 2 by a schematically illustrated electrolytic cell
- FIG. 2 shows a section along the line II-II through the electrolytic cell of FIG. 1, 3 is a partial view of a separable, bipolar electrode, seen in the direction of arrow (A) in FIG. 2,
- Fig. 5 shows a further variant of a separable, bipolar
- Electrode shown in longitudinal section analogous to Fig. 1,
- Fig. 6 is a section along the line VI-VI through the electrode of Fig. 5 and
- Fig. 7 four ways of designing a partition in view.
- a first bipolar electrode (7), a second bipolar electrode (8), a plate-shaped end anode (9) and a plate-shaped end cathode (10) are located in the container (2).
- the main parts of the separable electrode (7) are the cathode side (K7) and the anode side (A7), as well as the electrically conductive connection (11) between the two electrode sides (K7) and (A7).
- the other bipolar electrode (8) has the cathode side (K8), the anode side (A8) and the electrically conductive connection (12).
- the anode side (A8) and the electrically conductive connection (12) are preferably firmly connected to one another.
- the cathode side (K8) only touches the connection (12) if the cathode side (K8), as shown in FIG. 1, is supported on the connection (12) during operation.
- the cathode side (K8) can be moved upwards and can be pulled out of the container (2) and then returned to its operating position (Fig. 1), as indicated by the double arrow (B).
- the cathode side (K7) of the bipolar electrode (7) can also be moved upwards (arrow B). In the operating position shown in FIG. 1, the cathode side (K7) is hooked into the electrically conductive connection (11), as will be explained in more detail with reference to FIGS. 2 and 3.
- the connection (11) is preferably firmly connected to the anode side (A7) in order to establish good electrical contact between (A7) and (11).
- Fig. 2 shows the vertical cross section along the line II-II through the electrode (7) of Fig. 1.
- the cathode side (K7) which is attached to a horizontal, electrically conductive support rod (15) .
- the support rod is supported in Fig. 2 on two electrically conductive connections (11) which are arranged on the upper edge (2a) of the container (2).
- Fig. 3 shows the view of the representation of FIG. 2, viewed in the direction of arrow (A). You can see the upper edge of the container (2a) on which there is a connection (11) which can be connected to the container. Connected to the electrically conductive connection (11) is the anode side (A7) shown in dashed lines in FIG. 3.
- the support rod (15) relative to the connection (11) is shown somewhat raised. This is to make it clear that the cathode side (K7), which is connected to the rod (15), can be removed upwards together with this rod. By this is indicated by the arrow (B).
- the rod (15) In the operating position, see Fig. 2, the rod (15) is in a notch (16) in the top of the connection (11).
- Corrosion-prone parts such as B.
- the support rod (15) or the connection (11) can be provided in whole or in part with a titanium jacket which surrounds an electrically conductive copper core.
- Fig. 4 shows the vertical section along the line IV-IV in Fig. 1.
- the cathode side (K8) can be seen, which is connected to a horizontal support (18).
- the support (18) need not be designed to be electrically conductive.
- the cathode side (K8) is supported on the electrically conductive connection (12), which is designed like a stool.
- a small notch, not shown, in the edge of the container (2) ensures that the support is only guided laterally and the full weight of the cathode side (K8) rests on the connection (12).
- Fig. 5 shows a further variant of a separable bipolar electrode (13) in longitudinal section analogous to Fig. 1;
- Fig. 6 shows the longitudinal section along the line VI-VI in Fig. 5.
- the cathode side (K13) above the container edge (2a) has a horizontal connection (11a), which in the operating position (see Fig. 5) the electrically conductive Establishes contact with the anode side (A13).
- a horizontal partition wall (20) is shown in FIGS. 5 and 6, which is arranged in the region of the electrolyte and is fastened to the side walls (2b) and (2c) of the container (2).
- the upper edge of the partition is slightly higher than the liquid level (5).
- the partition (20) is usually made of non-conductive material, e.g. B. plastic.
- the shape of the partition (20) and also the openings or perforations arranged in it can influence the electrical field built up between the cathode side (K13) and the anode side (A13).
- the partition focuses the electric field between the anode side and the cathode side. This makes it possible, particularly in the case of copper deposition on steel cathodes, to ensure that the edge regions of the cathode are kept completely or largely free of deposited copper. Also z. B. in the production of zinc, it is advantageous if the cathode side, on which the metal is deposited, is free of deposits at the edges.
- FIG. 7 shows the partition (20) in view with four variants a) to d) the design of its edge area. 7a, numerous openings (22) are arranged in the partition (20) in the vicinity of the side wall (2b) of the container (2). These openings allow the electrolyte and thus the electrical field to pass partially and thus weakened through the partition (20).
- the edge area of the partition is provided with elongated holes (23), in Fig. 7c triangular recesses (24) result in a sawtooth-like notched edge of the partition (20), and in Fig.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU54850/98A AU719026B2 (en) | 1996-12-04 | 1997-11-21 | Electrolytic cell with bipolar electrodes |
US09/319,362 US6224720B1 (en) | 1996-12-04 | 1997-11-21 | Electrolytic cell with removable bipolar electrodes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19650228A DE19650228C2 (de) | 1996-12-04 | 1996-12-04 | Elektrolysezelle mit bipolaren Elektroden |
DE19650228.4 | 1996-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998024950A1 true WO1998024950A1 (de) | 1998-06-11 |
Family
ID=7813580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/006505 WO1998024950A1 (de) | 1996-12-04 | 1997-11-21 | Elektrolysezelle mit bipolaren elektroden |
Country Status (6)
Country | Link |
---|---|
US (1) | US6224720B1 (de) |
CN (1) | CN1181225C (de) |
AU (1) | AU719026B2 (de) |
DE (1) | DE19650228C2 (de) |
PE (1) | PE39299A1 (de) |
WO (1) | WO1998024950A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8021526B2 (en) * | 2005-04-05 | 2011-09-20 | G.B.D. Corp | Household appliances which utilize an electrolyzer and electrolyzer that may be used therein |
US20080198531A1 (en) * | 2007-02-15 | 2008-08-21 | Lih-Ren Shiue | Capacitive deionization system for water treatment |
GB2483627A (en) * | 2010-04-06 | 2012-03-21 | Metalysis Ltd | A bipolar electrolysis cell and method of operation |
CN109360784A (zh) * | 2018-09-13 | 2019-02-19 | 安徽钜芯半导体科技有限公司 | 一种去除芯片表面硼硅玻璃的方法 |
WO2023111641A1 (en) * | 2021-12-15 | 2023-06-22 | Arcelormittal | Compact apparatus for production of iron metal by electrolysis |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2355876A1 (de) * | 1972-11-09 | 1974-05-16 | Diamond Shamrock Corp | Bipolare elektrode und deren verwendung |
US4119519A (en) * | 1977-04-04 | 1978-10-10 | Kerr-Mcgee Corporation | Bipolar electrode for use in an electrolytic cell |
EP0286093A1 (de) * | 1987-04-10 | 1988-10-12 | Mitsubishi Materials Corporation | Verfahren zur Elektrogewinnung von Metall mit einer Elektrodeneinheit aus Anoden- und Kathoden-Platten und Rahmengestell zum Bauen einer solchen Elektrodeneinheit |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2343821A2 (fr) * | 1975-03-21 | 1977-10-07 | Ugine Kuhlmann | Electrolyseur perfectionne pour la preparation industrielle du fluor |
US5225061A (en) * | 1991-05-24 | 1993-07-06 | Westerlund Goethe O | Bipolar electrode module |
-
1996
- 1996-12-04 DE DE19650228A patent/DE19650228C2/de not_active Expired - Fee Related
-
1997
- 1997-11-21 WO PCT/EP1997/006505 patent/WO1998024950A1/de active IP Right Grant
- 1997-11-21 PE PE1997001058A patent/PE39299A1/es not_active Application Discontinuation
- 1997-11-21 CN CNB971803528A patent/CN1181225C/zh not_active Expired - Fee Related
- 1997-11-21 AU AU54850/98A patent/AU719026B2/en not_active Ceased
- 1997-11-21 US US09/319,362 patent/US6224720B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2355876A1 (de) * | 1972-11-09 | 1974-05-16 | Diamond Shamrock Corp | Bipolare elektrode und deren verwendung |
US4119519A (en) * | 1977-04-04 | 1978-10-10 | Kerr-Mcgee Corporation | Bipolar electrode for use in an electrolytic cell |
EP0286093A1 (de) * | 1987-04-10 | 1988-10-12 | Mitsubishi Materials Corporation | Verfahren zur Elektrogewinnung von Metall mit einer Elektrodeneinheit aus Anoden- und Kathoden-Platten und Rahmengestell zum Bauen einer solchen Elektrodeneinheit |
Also Published As
Publication number | Publication date |
---|---|
AU5485098A (en) | 1998-06-29 |
PE39299A1 (es) | 1999-05-01 |
DE19650228A1 (de) | 1998-06-10 |
US6224720B1 (en) | 2001-05-01 |
AU719026B2 (en) | 2000-05-04 |
CN1181225C (zh) | 2004-12-22 |
CN1240003A (zh) | 1999-12-29 |
DE19650228C2 (de) | 1999-09-02 |
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