EP0071754A1 - Monopolar filter-press electrolytic cell - Google Patents

Monopolar filter-press electrolytic cell Download PDF

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Publication number
EP0071754A1
EP0071754A1 EP82105895A EP82105895A EP0071754A1 EP 0071754 A1 EP0071754 A1 EP 0071754A1 EP 82105895 A EP82105895 A EP 82105895A EP 82105895 A EP82105895 A EP 82105895A EP 0071754 A1 EP0071754 A1 EP 0071754A1
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EP
European Patent Office
Prior art keywords
cell
elements
electrolyte
electrolyte chambers
discharge
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.)
Withdrawn
Application number
EP82105895A
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German (de)
French (fr)
Inventor
Helmut Ing. Grad. Schmitt
Helmuth Dipl.-Ing. Schurig
Bernd Dr. Dipl.-Ing. Strasser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Uhde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uhde GmbH filed Critical Uhde GmbH
Publication of EP0071754A1 publication Critical patent/EP0071754A1/en
Withdrawn legal-status Critical Current

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    • 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
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type

Definitions

  • the invention relates to a monopolar electrolytic filter press cell which is suitable for the electrolysis of an aqueous, halide-containing electrolyte (brine) in order to produce an aqueous alkali metal hydroxide solution (cell liquid) and halogen and hydrogen.
  • the cell consists of the two end pressure plates with tension anchors, a large number of alternately arranged anolyte and catholyte chambers, the electrolyte chambers, each made up of two anode and cathode plates, each separated by a flat ion-permeable element, the membrane.
  • an electrolytic membrane cell which, in the manner of the filter press cells, consists of a large number of anode and cathode plates lined up with intermediate membranes and spacer plates.
  • the anode and cathode plates according to the invention also have a non-conductive part which is provided with passages for the formation of channels for the supply and discharge of the process media.
  • the process media flow from the channels into the electrolyte chambers or from the electrolyte chambers into the channels via specially corrugated passages.
  • the thickness of the spacer plates between each membrane and anode plate or cathode plate defines the intended distance between two membranes.
  • the membrane cell described is characterized by a large number of different components with a large number of sealing points.
  • the invention has for its object to reduce the multitude of different elements and thus also the multitude of sealing points.
  • the advantages achieved by the invention are, in particular, that the number of components is significantly reduced, so that the number of sealing points also and that the cell can be easily manufactured and assembled.
  • the material for the individual components of the electrolytic cell corresponds to the known requirements according to the current state of the art and is not described in detail.
  • the monopolar electrolytic filter press cell consists of a plurality of electrolyte chambers 1 of different polarity shown in FIG. 1.
  • the anolyte chamber 2 is formed from two metal electrode plates 3 and the non-metal frame 4, which forms the outer edge of the chamber and at the same time defines the plate spacing. While the inner region 5 of the plates is permeable to gas and liquid, so that liquid can get to the following membrane 6 or the gas from it, the outer edge 7 of the plates is not permeable. The outer edge of the plates lies against the frame.
  • the membrane 5 lies between the described anolyte chamber 2 and the following catholyte chamber 8.
  • the catholyte chamber 8 is formed by two electrode plates 9 and the frame 10, which likewise forms the outer edge of the chamber. The current supply or the current discharge takes place via the current connection 11 on one side of each electrode plate.
  • the frames 4, 10 are not only the outer boundary of the electrolyte chambers, but they also contain several bores which serve as supply and discharge channels for the process media.
  • each frame In order to obtain four channels in the direction of the longitudinal axis, namely a brine channel 12, a cell fluid channel 13, a halogen channel 14 and a hydrogen channel 15, each frame has four bores 16, 17, -18, 19.
  • the frame 4 of the anolyte chamber 2 has two bores 20, 21 between the anolyte chamber and brine channel 12 and halogen channel 14 so that the process media can be conducted into or removed from the electrolyte chambers.
  • the frame 10 of the catholyte chamber 8 has the two bores 22 and 23 between the catholyte chamber and the cell fluid channel 13 and the hydrogen channel 15.
  • the sealing of the individual components against each other takes place in a known manner by means of surface seals or by vulcanized sealing material.

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  • 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)

Abstract

Die monopolare elektrolytische Filterpressenzelle ist geeignet für die Elektrolyse eines wäßrigen, halogenidhaltigen Elektrolyts (Sole) um eine wäßrige Alkalimetallhydroxidlösung (Zellenflüssigkeit), Halogen und Wasserstoff herzustellen. Die Zelle besteht aus den beiden Enddruckplatten mit Spannankern, aus einer Vielzahl von elektrisch leitfähigen, elektrolytisch wirkenden Elementen, den Elektrolytkammern, den zwischengeschalteten Membranen, den Elementen für die Zu- und Abfuhr der Verfahrensmedien und aus den entsprechenden Dichtungen. Die Elektrolytkammern werden gebildet aus zwei für Flüssigkeit und Gas durchlässigen Elektrodenplatten, die an einer Seite über die Kammer herausragen als Stromanschluß und aus dem Rahmenelement an dem die zwei Elektrodenplatten anlegen. Das Rahmenelement selbst ist elektrisch nicht leitend, elektrolytisch neutral und es weist Bohrungen auf für die Zu- und Abfuhr der Verfahrensmedien in und aus den Elektrolytkammern.The monopolar electrolytic filter press cell is suitable for the electrolysis of an aqueous, halide-containing electrolyte (brine) in order to produce an aqueous alkali metal hydroxide solution (cell liquid), halogen and hydrogen. The cell consists of the two end pressure plates with tension anchors, a large number of electrically conductive, electrolytically acting elements, the electrolyte chambers, the interposed membranes, the elements for the supply and discharge of the process media and the corresponding seals. The electrolyte chambers are formed from two electrode plates that are permeable to liquid and gas, which protrude on one side above the chamber as a power connection, and from the frame element on which the two electrode plates rest. The frame element itself is electrically non-conductive, electrolytically neutral and it has bores for the supply and discharge of the process media in and out of the electrolyte chambers.

Description

Die Erfindung betrifft eine monopolare elektrolytische Filterpressenzelle, die geeignet ist für die Elektrolyse eines wäßrigen, halogenidhaltigen Elektrolyts (Sole) um eine wäßrige Alkalimetallhydroxidlösung (Zellenflüssigkeit) und Halogen und Wasserstoff herzustellen. Die Zelle besteht dabei aus den beiden Enddruckplatten mit Spannankern, aus einer Vielzahl abwechselnd angeordneter Anolyt- und Katholytkammern, den Elektrolytkammern, gebildet aus je zwei Anoden- und Kathodenplatten, die durch jeweils ein flächenhaftes Ionen-permeables Element, die Membran, getrennt sind.The invention relates to a monopolar electrolytic filter press cell which is suitable for the electrolysis of an aqueous, halide-containing electrolyte (brine) in order to produce an aqueous alkali metal hydroxide solution (cell liquid) and halogen and hydrogen. The cell consists of the two end pressure plates with tension anchors, a large number of alternately arranged anolyte and catholyte chambers, the electrolyte chambers, each made up of two anode and cathode plates, each separated by a flat ion-permeable element, the membrane.

Bei Filterpressenzellen der genannten Art ist es erforderlich, daß die Verfahrensmedien, wie Sole, Zellenflüssigkeit, Halogen und Wasserstoff so geführt werden,-daß eine schädliche Einwirkung ihrerseits auf die Metalle der Anoden- bzw. Kathodenplatten weitgehend vermieden wird.In the case of filter press cells of the type mentioned, it is necessary for the process media, such as brine, cell liquid, halogen and hydrogen, to be conducted in such a way that a harmful effect on the metals on the anode or cathode plates is largely avoided.

Nach DE-OS 28 09 332 ist eine elektrolytische Membranzelle bekannt, die nach Art der Filterpressenzellen aus einer Vielzahl von aneinandergereihten Anoden- und Kathodenplatten mit zwischenliegenden Membranen und.Abstandsplatten besteht. Die Anoden- und Kathodenplatten weisen erfindungsgemäß neben ihrem elektrokatalytisch aktiven metallenen Teil auch einen nicht leitenden Teil auf, der mit Durchgängen für die Bildung von Kanälen für die Zu- und Abfuhr der Verfahrensmedien versehen ist. Die Verfahrensmedien fließen über speziell gewellte Durchlässe aus den Kanälen in die Elektrolytkammern bzw. aus den Elektrolytkammern in die Kanäle. Die Dicke der_Abstandsplatten zwischen einer jeden Membran- und Anodenplatte bzw. Kathodenplatte definiert den vorgesehenen Abstand zwischen jeweils zwei Membranen.According to DE-OS 28 09 332, an electrolytic membrane cell is known which, in the manner of the filter press cells, consists of a large number of anode and cathode plates lined up with intermediate membranes and spacer plates. In addition to their electrocatalytically active metal part, the anode and cathode plates according to the invention also have a non-conductive part which is provided with passages for the formation of channels for the supply and discharge of the process media. The process media flow from the channels into the electrolyte chambers or from the electrolyte chambers into the channels via specially corrugated passages. The thickness of the spacer plates between each membrane and anode plate or cathode plate defines the intended distance between two membranes.

Die beschriebene Membranzelle zeichnet sich aus durch eine Vielzahl von verschiedenen Bauelementen mit einer Vielzahl von Dichtstellen.The membrane cell described is characterized by a large number of different components with a large number of sealing points.

Der Erfindung liegt die Aufgabe zugrunde, die Vielzahl der verschiedenen Elemente_und damit auch die Vielzahl der Dichtstellen zu vermindern.The invention has for its object to reduce the multitude of different elements and thus also the multitude of sealing points.

Diese Aufgabe wird erfindungsgemäß gelöst durch die im Kennzeichen des Hauptanspruchs beschriebenen Maßnahmen.This object is achieved according to the invention by the measures described in the characterizing part of the main claim.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß die Anzahl der Bauelemente wesentlich verringert wird, damit die Anzahl der Dichtstellen ebenfalls und daß die Zelle einfach hergestellt und zusammengebaut werden kann.The advantages achieved by the invention are, in particular, that the number of components is significantly reduced, so that the number of sealing points also and that the cell can be easily manufactured and assembled.

Das Material für die einzelnen Bauelemente der Elektrolysezelle entspricht den bekannten Anforderungen gemäß dem derzeitigen Stand der Technik und wird im einzelnen nicht näher beschrieben.The material for the individual components of the electrolytic cell corresponds to the known requirements according to the current state of the art and is not described in detail.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and will be described in more detail below.

Es zeigen:

  • Fig. 1 einen Querschnitt durch mehrere nebeneinander angeordnete Anoden- und Kathodenkammern.
  • Fig. 2 eine Rahmen-Elektrodenkombination der Anodenkammer der Filterpressenzelle.
  • Fig. 3 eine Rahmen-Elektrodenkombination der Kathodenkammer der Filterpressenzelle.
Show it:
  • Fig. 1 shows a cross section through a plurality of anode and cathode chambers arranged side by side.
  • Fig. 2 shows a frame-electrode combination of the anode chamber of the filter press cell.
  • Fig. 3 shows a frame-electrode combination of the cathode chamber of the filter press cell.

Die monopolare elektrolytische Filterpressenzelle besteht aus einer Vielzahl von in Fig. 1 dargestellten Elektrolytkammern 1 unterschiedlicher Polarität. Die Anolytkammer 2 wird gebildet aus zwei metallenen Elektrodenplatten 3 und dem nicht-metallenen Rahmen 4, der den äußeren Rand der Kammer bildet und gleichzeitig den Plattenabstand festlegt. Während der innere Bereich 5 der Platten für Gas und Flüssigkeit durchlässig ist, so daß Flüssigkeit an die folgende Membran 6 bzw. das Gas von ihr weggelangen kann, ist der äußere Rand 7 der Platten nicht durchlässig. Die Platten liegen mit dem äußeren Rand jeweils am Rahmen an. Die Membran 5 liegt zwischen der beschriebenen Anolytkammer 2 und der folgenden Katholytkammer 8. Die Katholytkammer 8 wird gebildet durch zwei Elektrodenplatten 9 und den Rahmen 10, der ebenfalls den äußeren Rand der Kammer bildet. Die Stromzufuhr bzw. die Stromableitung erfolgt über den Stromanschluß 11 an einer Seite jeder Elektrodenplatte.The monopolar electrolytic filter press cell consists of a plurality of electrolyte chambers 1 of different polarity shown in FIG. 1. The anolyte chamber 2 is formed from two metal electrode plates 3 and the non-metal frame 4, which forms the outer edge of the chamber and at the same time defines the plate spacing. While the inner region 5 of the plates is permeable to gas and liquid, so that liquid can get to the following membrane 6 or the gas from it, the outer edge 7 of the plates is not permeable. The outer edge of the plates lies against the frame. The membrane 5 lies between the described anolyte chamber 2 and the following catholyte chamber 8. The catholyte chamber 8 is formed by two electrode plates 9 and the frame 10, which likewise forms the outer edge of the chamber. The current supply or the current discharge takes place via the current connection 11 on one side of each electrode plate.

Die Rahmen 4, 10 sind nicht nur äußere Begrenzung der Elektrolytkammern, sondern sie enthalten mehrere Bohrungen, die als Zu- und Abfuhrkanäle für die Verfahrensmedien dienen. Um in Richtung der Längsachse vier Kanäle zu erhalten, und zwar einen Solekanal 12, einen Zellenflüssigkeitskanal 13, einen Halogenkanal 14 und einen Wasserstoffkanal 15, weist jeder Rahmen vier Bohrungen 16, 17, -18, 19 auf. Durch das Aneinanderreihen einer Vielzahl von Rahmen entstehen so in bekannter Weise die betreffenden Kanäle. Damit die Verfahrensmedien in die Elektrolytkammern geleitet bzw. aus ihnen entnommen werden können, weist der Rahmen 4 der Anolytkammer 2 zwei Bohrungen 20, 21 zwischen Anolytkammer und Solekanal 12 und Halogenkanal 14 auf. Der Rahmen 10 der Katholytkammer 8 weist die zwei Bohrungen 22 und 23 auf zwischen Katholytkammer und dem Zellenflüssigkeitskanal 13 sowie dem Wasserstoffkanal 15. Die Abdichtung der einzelnen Bauelemente gegeneinander erfolgt in bekannter Weise mittels Flächendichtungen oder durch aufvulkanisiertes Dichtmaterial.The frames 4, 10 are not only the outer boundary of the electrolyte chambers, but they also contain several bores which serve as supply and discharge channels for the process media. In order to obtain four channels in the direction of the longitudinal axis, namely a brine channel 12, a cell fluid channel 13, a halogen channel 14 and a hydrogen channel 15, each frame has four bores 16, 17, -18, 19. By lining up a large number of frames, the channels in question are formed in a known manner. The frame 4 of the anolyte chamber 2 has two bores 20, 21 between the anolyte chamber and brine channel 12 and halogen channel 14 so that the process media can be conducted into or removed from the electrolyte chambers. The frame 10 of the catholyte chamber 8 has the two bores 22 and 23 between the catholyte chamber and the cell fluid channel 13 and the hydrogen channel 15. The sealing of the individual components against each other takes place in a known manner by means of surface seals or by vulcanized sealing material.

Claims (1)

1. Monopolare elektrolytische Eilterpressenzelle, geeignet für die Elektrolyse eines wäßrigen, halogenidhaltigen Elektrolyts (Sole) um eine wäßrige Alkalimetallhydroxidlösung (Zellenflüssigkeit), Halogen und Wasserstoff herzustellen, wobei die Zelle aus den beiden Enddruckplatten mit Spannankern, aus einer Vielzahl von elektrisch leitfähigen, elektrolytisch wirkenden Elementen, den Elektrolytkammern, den zwischengeschalteten Membranen, den Elementen für die Zu- und Abfuhr der Verfahrensmedien und aus den entsprechenden Dichtungen besteht,
dadurch gekennzeichnet, daß die Elektrolytkammern (1) gebildet werden aus zwei für Flüssigkeit und Gas durchlässigen Elektrodenplatten (3, 8), die an einer Seite über die Kammer herausragen als Stromanschluß(10) und aus dem Rahmenelement (4) an dem die zwei Elektrodenplatten (3, 8) anliegen, wobei das Rahmenelement selbst elektrisch nicht leitend, elektrolytisch neutral, ist und es Bohrungen (16 bis 23) aufweist für die Zu- und Abfuhr der Verfahrensmedien in und aus den Elektrolytkammern in die Kanäle (12, 13, 14, 15) die in bekannter Weise durch das Aneinanderreihen einer Vielzahl der Rahmenelemente (4) entstehen und daß alle Elemente an den betreffenden Flächen gegeneinander abgedichtet sind.1. Monopolar electrolytic Eilterpressenzell, suitable for the electrolysis of an aqueous, halide-containing electrolyte (brine) to produce an aqueous alkali metal hydroxide solution (cell liquid), halogen and hydrogen, the cell from the two end pressure plates with tension anchors, from a variety of electrically conductive, electrolytically acting Elements, the electrolyte chambers, the interposed membranes, the elements for the supply and discharge of the process media and the corresponding seals,
characterized in that the electrolyte chambers (1) are formed from two liquid and gas permeable electrode plates (3, 8) which protrude on one side beyond the chamber as a power connection (10) and from the frame element (4) on which the two electrode plates (3, 8), the frame element itself being electrically non-conductive, electrolytically neutral, and it has bores (16 to 23) for the supply and discharge of the process media into and out of the electrolyte chambers into the channels (12, 13, 14 , 15) which arise in a known manner from the stringing together of a plurality of the frame elements (4) and that all elements on the surfaces in question are sealed off from one another.
EP82105895A 1981-08-04 1982-07-02 Monopolar filter-press electrolytic cell Withdrawn EP0071754A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813130806 DE3130806A1 (en) 1981-08-04 1981-08-04 MONOPOLAR ELECTROLYTIC FILTER PRESS CELL
DE3130806 1981-08-04

Publications (1)

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EP0071754A1 true EP0071754A1 (en) 1983-02-16

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EP82105895A Withdrawn EP0071754A1 (en) 1981-08-04 1982-07-02 Monopolar filter-press electrolytic cell

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US (1) US4426270A (en)
EP (1) EP0071754A1 (en)
JP (1) JPS5848684A (en)
BR (1) BR8204564A (en)
DE (1) DE3130806A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0220846A1 (en) * 1985-10-22 1987-05-06 Imperial Chemical Industries Plc Electrolytic cell
EP0145259B1 (en) * 1983-11-14 1988-10-19 Imperial Chemical Industries Plc Process for the electrolysis of aqueous alkali metal chloride solution
EP0378091A1 (en) * 1989-01-07 1990-07-18 Scientific Impex Establishment Block of cells for electrolysis

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8308187D0 (en) * 1983-03-24 1983-05-05 Ici Plc Electrolytic cell
US4548694A (en) * 1983-06-08 1985-10-22 Olin Corporation Catholyteless membrane electrolytic cell
DE19544585C1 (en) * 1995-11-30 1997-06-26 Dornier Gmbh Electrolyzer with liquid electrolyte

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954956C (en) * 1953-01-08 1956-12-27 Demag Elektrometallurgie Gmbh Filter press type water decomposer
US3864236A (en) * 1972-09-29 1975-02-04 Hooker Chemicals Plastics Corp Apparatus for the electrolytic production of alkali
DE2809332A1 (en) * 1977-03-04 1978-10-12 Ici Ltd ELECTROLYTIC MEMBRANE CELL
US4149952A (en) * 1975-04-15 1979-04-17 Asahi Glass Co. Ltd. Electrolytic cell
US4217199A (en) * 1979-07-10 1980-08-12 Ppg Industries, Inc. Electrolytic cell

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954956C (en) * 1953-01-08 1956-12-27 Demag Elektrometallurgie Gmbh Filter press type water decomposer
US3864236A (en) * 1972-09-29 1975-02-04 Hooker Chemicals Plastics Corp Apparatus for the electrolytic production of alkali
US4149952A (en) * 1975-04-15 1979-04-17 Asahi Glass Co. Ltd. Electrolytic cell
DE2809332A1 (en) * 1977-03-04 1978-10-12 Ici Ltd ELECTROLYTIC MEMBRANE CELL
US4217199A (en) * 1979-07-10 1980-08-12 Ppg Industries, Inc. Electrolytic cell

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0145259B1 (en) * 1983-11-14 1988-10-19 Imperial Chemical Industries Plc Process for the electrolysis of aqueous alkali metal chloride solution
EP0220846A1 (en) * 1985-10-22 1987-05-06 Imperial Chemical Industries Plc Electrolytic cell
US4729822A (en) * 1985-10-22 1988-03-08 Imperial Chemical Industries Plc Electrolytic cell
EP0378091A1 (en) * 1989-01-07 1990-07-18 Scientific Impex Establishment Block of cells for electrolysis

Also Published As

Publication number Publication date
BR8204564A (en) 1983-07-26
DE3130806A1 (en) 1983-03-03
US4426270A (en) 1984-01-17
JPS5848684A (en) 1983-03-22

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