DE381811C - Diaphragm made of porous cement for electrolytic processes - Google Patents
Diaphragm made of porous cement for electrolytic processesInfo
- Publication number
- DE381811C DE381811C DER57318D DER0057318D DE381811C DE 381811 C DE381811 C DE 381811C DE R57318 D DER57318 D DE R57318D DE R0057318 D DER0057318 D DE R0057318D DE 381811 C DE381811 C DE 381811C
- Authority
- DE
- Germany
- Prior art keywords
- cement
- diaphragm made
- electrolytic processes
- porous cement
- porous
- 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
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
- C25B13/00—Diaphragms; Spacing elements
- C25B13/04—Diaphragms; Spacing elements characterised by the material
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Metals (AREA)
Description
Diaphragma aus porösem Zement für elektrolytische Verfahren. Durch die Patentschrift 34888 wurde zuerst ein Verfahren bekannt, poröse, stromdurchlässige Diaphragmen aus Zement und Kochsalz herzustellen. Später hat man mit mehr oder weniger Erfolg versucht, das Kochsalz durch andere gleichfalls leicht zu entfernende Beimengungen, wie Schwefel usw., zu ersetzen.Porous cement diaphragm for electrolytic processes. Patent specification 34888 first disclosed a method for producing porous, current-permeable diaphragms from cement and common salt. Later attempts were made, with more or less success, to replace the table salt with other additions that were equally easy to remove, such as sulfur, etc.
Die auf die eine oder andere Weise erhaltenen Diaphragmen müssen, um genügende Festigkeit zu besitzen, ziemlich dickwandig hergestellt werden, so daß der Widerstand, den sie dem Durchgange des elektrischen Stromes entgegensetzen, nicht unbeträchtlich ist. Es wurde nun gefunden, daß das an sich zur Versteifung von Zementgegenständen bekannte Hilfsmittel, die Einlage von Metalldraht oder Geflecht, auch bei der Herstellung poröser Zementdiaphraginen Verwendung finden kann. Durch die hierdurch erzielte größere Festigkeit der Diaphragmen kann ihre Dicke sehr wesentlich verringert werden. Es gelang durch Aufstreichen von mit konzentrierter \Ta - Cl-Lösung angefeuchteten Zement-Kochsalzmischungen auf engmaschige Eisendrahtnetze haltbare Diaphragmen von nur etwa 2 mm Dicke herzustellen, die dem elektrischen Strome nur sehr geringen Widerstand entgegensetzten. Diese Diaphragmen sind in neutralen und alkalischen Elektrolyten brauchbar, ohne daß, wie zu befürchten war, das im Diäphragma befindliche Eisen die Rolle eines Zwischenleiters in störender Weise spielt. Völlig ausschalten läßt sich jegliche Zwischenleitung, falls das Drahtnetz vor dem Aufstreichen des Zementes, beispielsweise durch Erhitzen im Wasserdampfstrorn, oberflächlich mit einer Oxydschicht versehen wird.The diaphragms obtained in one way or another must in order to have sufficient strength, be made quite thick-walled, so that the resistance which they oppose to the passage of the electric current, is not insignificant. It has now been found that that in itself stiffens aids known from cement objects, the inlay of metal wire or mesh, can also be used in the manufacture of porous cement diaphragms. By the greater strength of the diaphragms achieved as a result, their thickness can be very substantial be reduced. It was achieved by spreading with concentrated \ Ta - Cl solution Moistened cement-table salt mixtures on close-meshed iron wire nets durable Manufacture diaphragms only about 2 mm thick, which only conduct electrical currents offer very little resistance. These diaphragms are in neutral and alkaline electrolytes usable without, as was to be feared, that in the diaphragma iron located plays the role of an intermediate conductor in a disruptive manner. Fully Any intermediate line can be switched off if the wire mesh is used before painting of the cement, for example by heating in a stream of steam, on the surface is provided with an oxide layer.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER57318D DE381811C (en) | 1922-11-28 | 1922-11-29 | Diaphragm made of porous cement for electrolytic processes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE207801X | 1922-11-28 | ||
DER57318D DE381811C (en) | 1922-11-28 | 1922-11-29 | Diaphragm made of porous cement for electrolytic processes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE381811C true DE381811C (en) | 1923-09-25 |
Family
ID=25760375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER57318D Expired DE381811C (en) | 1922-11-28 | 1922-11-29 | Diaphragm made of porous cement for electrolytic processes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE381811C (en) |
-
1922
- 1922-11-29 DE DER57318D patent/DE381811C/en not_active Expired
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