EP0685575B1 - Elektrolysezellen-Elektrode - Google Patents
Elektrolysezellen-Elektrode Download PDFInfo
- Publication number
- EP0685575B1 EP0685575B1 EP95100928A EP95100928A EP0685575B1 EP 0685575 B1 EP0685575 B1 EP 0685575B1 EP 95100928 A EP95100928 A EP 95100928A EP 95100928 A EP95100928 A EP 95100928A EP 0685575 B1 EP0685575 B1 EP 0685575B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- electrode parts
- activated
- edge
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- 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
Definitions
- the invention relates to an electrode for electrolytic cells, in particular for mercury-chlor-alkali electrolytic cells.
- the activated electrode parts arranged on their lower edge with perpendicular to them made of upright flat profiles with vertical or almost vertical outer sides are connected by welding, the activated electrode parts from a larger one
- the current distributors and the activated electrode parts with a gap of at least 2 mm to each other.
- GB-A-10 68 992 describes an anode arrangement for chlor-alkali electrolysis in which the underside of power distributors is provided with electrode parts made of titanium sheet profiles, the have wedge-shaped tapered lower edges around a gas bubble discharge from the anode area to improve.
- an electrode for mercury-chlor-alkali electrolysis cells known with power supplies via rods or power supply bolts, which has spaced-apart flat profiles that are perpendicular to their lower edge is connected to them arranged activated electrode parts, the activated electrode parts consist of a larger number of individual elements than the electrical parts and the Individual elements seen in cross section has a tapering lower edge, which is essentially is formed exhaust gas; proves to be problematic in such circular or semicircular configurations the removal of the gas bubbles generated during electrolysis, since this on the one hand the ion exchange in the electrolytic gap between the semicircular profiles and hinder the mercury cathode, on the other hand, have no rapid withdrawal option, so that a kind of gas bubble cushion can be expected in the lower area of the profile anode got to; furthermore, the height of the activation coating on the electrodes is proportional high, so that the areas with precious metals are relatively far removed from the electrode gap Substances are provided, but practically no electrochemicals Contribute implementation.
- the object of the invention is so the electrodes or anodes for the chlor-alkali electrolysis cell to design that the gas extraction from the area of the electrode gap is promoted and an interface between the anode and the electrolyte in the area of the electrode gap that is as free as possible from gas bubbles is available;
- a high energy utilization in Electrolysis can be achieved by low electrode voltage.
- the triangle or wedge-shaped element of the Bottom edge an angle in the range of 30 to 90 °, in particular in the range of approx. 60 ° a particularly rapid gas extraction of the electrolytic reaction can take place. More beneficial Refinements are specified in the subclaims.
- the thickness is preferably of the activated electrode parts in the range from 1.5 to 2.5 mm.
- FIG. 1 shows an electrode, the upper part of the cross section of which tapers upwards is, while the lower part is tapered downwards.
- Figure 2 shows schematically an electrode with electrode elements according to Figure 1, the two upper current conductor levels are recognizable.
- FIG. 1 shows schematically the use of the electrodes 1,2 according to the invention with a base angle Alpha in the area of the lower edge 3 of 60 °, whereby due to the Bottom edge 3 isosceles extending partial triangle 4 by means of the electrocatalytic applied Layer 5 rapid electrolytic conversion and rapid removal any gas bubbles that may occur by means of a gap 6 between two adjacent electrodes 1,2 resulting chimney effect.
- the gas bubbles are symbolic here with reference numerals 7 provided.
- the electrodes 1, 2 with the current distributors 17 of the second are on their upper side 14 Layer connected, which are shown here only broken for a better overview.
- FIG. 2 shows schematically the electrode according to the invention with its three current collector levels of which the two upper levels are formed from rectangular flat profiles 17, 18, which stand upright on top of each other and are perpendicular to each other so that none Obstruction of the gas flow from the area of the electrode gap 6 can occur; on the lower edges of the current distributors 17 of the second level are the electrode elements 1, 2 fixed by welding at an angle of 90 ° so that the gas discharge of the resulting Gas bubbles are not hindered.
- the electrode structure of the two upper levels and the power supply line is referred to U.S. Patent 4,364,811.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Description
Claims (3)
- Elektrode für Elektrolysezellen, insbesondere für Quecksilber-Chloralkali-Elektrolysezellen, mit Stromzuführungen über Stäbe oder Stromzuführungsbolzen und Stromverteilern in Form von hochkant stehenden, mit Abstand zueinander angeordneten Flachprofilen, die an ihrer Unterkante mit senkrecht zu ihnen angeordneten aktivierten Elektrodenteilen aus hochkant stehenden Flachprofilen mit vertikalen oder annähernd vertikalen Außenseiten durch Verschweißen verbunden sind, wobei die aktivierten Elektrodenteile aus einer größeren Zahl von Einzelelementen bestehen als die Stromverteiler, und die aktivierten Elektrodenteile mit einem Spalt von wenigstens 2 mm zueinander angeordnet sind, dadurch gekennzeichnet, daß die aktivierten Elektrodenteile (1, 2) im Querschnitt gesehen sich keilförmig/prismatisch verjüngende Unterkanten aufweisen, die im Querschnitt des Profils gesehen ein dreieckförmiges Unterteil aufweisen, das von einem sich nach oben verjüngenden Oberteil gehalten wird.
- Elektrode nach Anspruch 1, dadurch gekennzeichnet, daß die keilförmige Unterkante aus zwei Ebenen gebildet ist, die sich in einem Winkel im Bereich von 40 bis 100° schneiden.
- Elektrode nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Elektrodenteile (1, 2) der dritten Ebene in einem Abstand im Bereich von 1,5 bis 3 mm zueinander parallel verlaufend angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4419277A DE4419277C2 (de) | 1994-06-01 | 1994-06-01 | Elektrolysezellen-Elektrode |
DE4419277 | 1994-06-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0685575A1 EP0685575A1 (de) | 1995-12-06 |
EP0685575B1 true EP0685575B1 (de) | 1999-05-06 |
Family
ID=6519607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95100928A Expired - Lifetime EP0685575B1 (de) | 1994-06-01 | 1995-01-25 | Elektrolysezellen-Elektrode |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0685575B1 (de) |
DE (2) | DE4419277C2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE263259T1 (de) * | 1999-01-08 | 2004-04-15 | Moltech Invent Sa | Aluminium-elektrogewinnungszelle mit sauerstoffentwickelnden anoden |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1068992A (en) * | 1964-03-31 | 1967-05-17 | Asahi Chemical Ind | Anode assembly |
US3507771A (en) * | 1966-09-30 | 1970-04-21 | Hoechst Ag | Metal anode for electrolytic cells |
US4022679A (en) * | 1973-05-10 | 1977-05-10 | C. Conradty | Coated titanium anode for amalgam heavy duty cells |
DE2949495C2 (de) * | 1979-12-08 | 1983-05-11 | Heraeus-Elektroden Gmbh, 6450 Hanau | Elektrode für Elektrolysezellen |
DE3008116A1 (de) * | 1980-03-03 | 1981-09-17 | Conradty GmbH & Co Metallelektroden KG, 8505 Röthenbach | Gasentwickelnde metallelektrode fuer elektrochemische prozesse |
DE3345530A1 (de) * | 1983-07-13 | 1985-06-27 | Basf Ag, 6700 Ludwigshafen | Gasentwickelnde metallelektrode fuer elektrolysezellen |
-
1994
- 1994-06-01 DE DE4419277A patent/DE4419277C2/de not_active Expired - Fee Related
-
1995
- 1995-01-25 EP EP95100928A patent/EP0685575B1/de not_active Expired - Lifetime
- 1995-01-25 DE DE59505815T patent/DE59505815D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0685575A1 (de) | 1995-12-06 |
DE4419277C2 (de) | 1998-07-02 |
DE59505815D1 (de) | 1999-06-10 |
DE4419277A1 (de) | 1995-12-07 |
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