DE221130C - - Google Patents
Info
- Publication number
- DE221130C DE221130C DE1908221130D DE221130DA DE221130C DE 221130 C DE221130 C DE 221130C DE 1908221130 D DE1908221130 D DE 1908221130D DE 221130D A DE221130D A DE 221130DA DE 221130 C DE221130 C DE 221130C
- Authority
- DE
- Germany
- Prior art keywords
- manganese
- peroxide
- anodes
- superoxide
- nitrate
- 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
Links
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
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
-
- 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
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/054—Electrodes comprising electrocatalysts supported on a carrier
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Metals (AREA)
- Inert Electrodes (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
- JVl 221130 -KLASSE 12 h. GRUPPE - JVl 221130 - CLASS 12 h. GROUP
Für elektrolytische Zwecke, insbesondere für die Elektrolyse wäßriger Salzlösungen, wie z. B. Zinksulfat-, Kupfernitratlösungen u. dgl., ist es zweckmäßig, namentlich wenn freie Säure während des Prozesses vorhanden ist, eine unangreifbare Anode zu verwenden. Als besonders geeignet haben sich Anoden in Form von massiven Blöcken aus chemisch reinem Mangansuperoxyd erwiesen, durch deren Anwendung eine schädliche Verunreinigung des Elektrolyten mit Sicherheit vermieden wird, wie sie z. B. bei Benutzung natürlicher Braunsteinanoden (mit Stromzuführung durch Kohlenstäbe) oder von Bleisuperoxydanoden u. dgl.For electrolytic purposes, especially for the electrolysis of aqueous salt solutions, such as z. B. zinc sulfate, copper nitrate solutions and the like., It is useful, especially if free acid is present during the process to use an unassailable anode. As special Anodes in the form of solid blocks of chemically pure are suitable Manganese peroxide has been shown to cause harmful contamination of the Electrolytes are avoided with certainty, as they are e.g. B. when using natural manganese dioxide anodes (with power supply through carbon rods) or from lead peroxide anodes and the like.
leicht entsteht.easily arises.
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von derartigen reinen Mangansuperoxydanoden in Blockform. Erfindungsgemäß geschieht die Herstellung der Mangan-The invention relates to a method for producing such pure manganese superoxide anodes in block form. According to the invention, the production of the manganese takes place
ao superoxydanoden unter Benutzung von Mangannitrat. ao superoxide anodes using manganese nitrate.
Zur Gewinnung der Anoden aus reinem Mangansuperoxyd in Form von Blöcken, Platten, Stangen o. dgl. wird gemäß der Erfindung in der Weise verfahren, daß reines Mangannitrat in Formen, welche weder von der entstehenden Schmelze noch von den sich bildenden Gasen angegriffen werden, auf 140° bis 200° C. erhitzt wird. Hierbei scheidet sich Mangansuperoxyd als feste kohärente Masse in Kuchenform ab, indem es dabei die durch das verwendete Gefäß bestimmte Form annimmt. Die Dauer der Erhitzung hängt naturgemäß von den Abmessungen der herzustellenden Elektrode ab.To obtain the anodes from pure manganese peroxide in the form of blocks, plates, rods or the like, the procedure according to the invention is such that pure manganese nitrate in forms which are neither attacked by the resulting melt nor by the gases formed 140 ° to 200 ° C. is heated. Here, manganese peroxide is deposited as a solid, coherent mass in cake form, taking on the shape determined by the container used. The duration of the heating naturally depends on the dimensions of the electrode to be produced.
Die Herstellung der Elektroden kann auch in der Weise geschehen, daß man reines kristallinisches Mangansuperoxyd mit einer Beimengung von Mangannitrat mechanisch in Formen preßt und eventuell dann erhitzt. In diesem Falle dient das Mangannitrat als Bindemittel, das sich durch die Erhitzung ebenfalls in Mangansuperoxyd umwandelt. In dieser Weise können zweckmäßig auch alte, bereits gebrauchte Elektroden oder reines kristallinisches Mangansuperoxyd nach entsprechender Vorbereitung zu neuen, als Anoden verwendbaren Elektroden verarbeitet werden.The electrodes can also be produced in such a way that pure crystalline material is obtained Manganese peroxide with an admixture of manganese nitrate is mechanically pressed into molds and then possibly heated. In this case, the manganese nitrate acts as a binder, which is created by heating also converted into manganese peroxide. In this way, old, already used electrodes or pure crystalline manganese peroxide according to the appropriate Preparation to be processed into new electrodes that can be used as anodes.
Bei der Erhitzung zerfällt das Mangannitrat in Mangansuperoxyd und Stickstoffoxyde. Die gebildeten Stickstoffoxyde lassen sich in Form von Mangannitrat wiedergewinnen, indem man sie zu in Wasser suspendierten Gemengen von Mangansuperoxyd und Manganoxyd o'der Manganoxyduloxyd leitet. Hier kann sowohl reines Mangansuperoxyd als auch natürlicher Braunstein 0. dgl. und die dem Manganoxyd bzw. Manganoxyduloxyd entsprechenden Mineralien Anwendung finden.When heated, the manganese nitrate breaks down into manganese peroxide and nitrogen oxides. the The nitrogen oxides formed can be recovered in the form of manganese nitrate by them to mixtures of manganese peroxide and manganese oxide or manganese oxide, suspended in water directs. Both pure manganese peroxide and natural manganese dioxide, etc., and that of manganese oxide can be used here or manganese oxide corresponding minerals are used.
Da Mangansuperoxyd verhältnismäßig leicht reduzierbar ist und die niedrigeren Oxydationsstufen des Mangans den elektrischen Strom nicht oder nur sehr schlecht leiten, ist es im allgemeinen schwierig, die Anschlüsse der elek-Since manganese peroxide is relatively easy to reduce and the lower oxidation levels of manganese the electric current do not conduct or conduct only very poorly, it is generally difficult to connect the electrical connections
irischen Leitungen an die Enden von Mangansuperoxydelektroden mit gutem und dauerhaftem Kontakt anzuschließen. Um dies zu erreichen, hat es sich nun als zweckmäßig herausgestellt, die betreffenden Enden der Elektroden galvanisch mit einer Schicht von Bleisuperoxyd zu überziehen. Die Stärke dieser Bleisuperoxydschicht kann ganz minimal sein. An dem mit Bleisuperoxyd überzogenenIrish leads to the ends of manganese superoxide electrodes with good and durable Connect contact. In order to achieve this, it has now been found to be useful, the relevant ends of the Electrodes to be galvanically coated with a layer of lead peroxide. The strenght this lead peroxide layer can be quite minimal. On the one coated with lead peroxide
ίο ' Ende der Elektrode ist dann leicht ein Kontakt in bekannter Weise zu befestigen. Dies kann z. B. in der Weise geschehen, daß das mit dem Überzug versehene Ende mit einem leicht schmelzbaren Metall oder einer Metallegierung umgössen wird, oder daß Halter verwendet werden.ίο 'The end of the electrode is then slightly in contact to attach in a known manner. This can e.g. B. happen in such a way that the Plated end with an easily fusible metal or a metal alloy is cast around, or that holders are used.
Die gemäß der Erfindung hergestellten Mangansuperoxydanoden lassen sich insbesondere mit Vorteil für die Elektrolyse von Zink aus wäßrigen Sulfatlösungen benutzen. Hierbei wird dadurch, daß kein elektronegativeres Metall als Zink in die Lösung gelangen kann, selbst wenn die Anode angegriffen wird, das Gelingen derartiger Elektrolysen gesichert.The manganese superoxide anodes produced according to the invention can be in particular Use with advantage for the electrolysis of zinc from aqueous sulfate solutions. Here is because no more electronegative metal than zinc can get into the solution, even if the anode is attacked, the success of such electrolyses is assured.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT45294D AT45294B (en) | 1908-01-15 | 1909-03-08 | Process for the production of massive manganese superoxide anodes. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB190900605T | 1909-01-09 | ||
DE191502767X | 1914-02-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE221130C true DE221130C (en) |
Family
ID=32657996
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT282225D Active DE282225C (en) | 1909-01-09 | ||
DE1908221130D Expired - Lifetime DE221130C (en) | 1908-01-15 | 1908-01-15 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT282225D Active DE282225C (en) | 1909-01-09 |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE221130C (en) |
GB (1) | GB191502767A (en) |
-
0
- DE DENDAT282225D patent/DE282225C/de active Active
-
1908
- 1908-01-15 DE DE1908221130D patent/DE221130C/de not_active Expired - Lifetime
-
1915
- 1915-02-20 GB GB191502767D patent/GB191502767A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB191502767A (en) | 1915-07-08 |
DE282225C (en) |
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