EP0004903A2 - Method for preparing chlorine by electrolysis of hydrochloric acid, and electrolytic cell therefor - Google Patents

Method for preparing chlorine by electrolysis of hydrochloric acid, and electrolytic cell therefor Download PDF

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Publication number
EP0004903A2
EP0004903A2 EP79101017A EP79101017A EP0004903A2 EP 0004903 A2 EP0004903 A2 EP 0004903A2 EP 79101017 A EP79101017 A EP 79101017A EP 79101017 A EP79101017 A EP 79101017A EP 0004903 A2 EP0004903 A2 EP 0004903A2
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Prior art keywords
electrolysis
electrolytes
floor
hydrochloric acid
electrodes
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EP79101017A
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German (de)
French (fr)
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EP0004903B1 (en
EP0004903A3 (en
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Franz-Rudolf Dr. Minz
Herbert Wiechers
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Bayer AG
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Bayer AG
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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
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/24—Halogens or compounds thereof
    • C25B1/26—Chlorine; Compounds thereof

Definitions

  • the electrolytic generation of hydrogen and chlorine from hydrochloric acid is generally carried out in electrolytic cells in which 30 to 45 vertically arranged bipolar electrodes are combined, the electrolytic chamber formed between two electrodes being divided by a diaphragm.
  • the electrode area is usually approximately 2.5 m 2 and has a square cross section; see, for example, DAS 1 216 852 or Chem. Ing.technik 39, 731 (1967).
  • the hydrochloric acid flows through the electrolysis chamber from bottom to top, hydrogen forming in the catholyte space and chlorine in the anolyte space.
  • the catholyte and anolyte are thus enriched with gas bubbles on their way through the electrolysis chamber.
  • the gas bubbles are separated after the electrolytes have left the cell.
  • the subject of the present invention is therefore a process for the production of chlorine and hydrogen from hydrochloric acid by electrolysis in an electrolytic cell, consisting of a plurality of vertically arranged bipolar electrodes, a diaphragm being arranged between two electrodes for dividing the electrolytic chambers formed between them into an anolyte space and a catholyte space Drainage and inflow devices for the electrolytes, which is characterized in that the hydrochloric acid is electrolyzed in at least two successive stages, being degassed after leaving one stage and before entering the next stage.
  • the present invention also relates to a hydrochloric acid electrolysis cell, consisting of a multiplicity of vertically arranged bipolar electrodes, a diaphragm being arranged between two electrodes for dividing the electrolysis chamber formed between them into an anolyte space and a catholyte space, furthermore drainage and inflow devices for the electrolytes, which are characterized in that the bipolar electrodes and the electrolysis chambers "are each divided into floors in at least one horizontal plane perpendicular to the electrode surface and additional inflow and outflow devices for the electrolytes are provided in this plane, so that each floor is separated from one another independent electrolyte circuits are formed.
  • the height of the partial electrode surfaces resulting from the subdivision of the electrodes is preferably 40 to 80 cm, particularly preferably approximately 60 cm.
  • the bipolar electrodes are expediently each held in holding frames which are stacked together in the manner of filter presses.
  • the principle of such arrangements is e.g. in DOS 2 222 637 or DOS 2 317 359.
  • the electrolysis frames for receiving the electrodes contain a plurality of windows lying one above the other, the webs containing inflow and outflow channels for the electrolytes.
  • Electrolysis cell is operated in such a way that both catholyte and anolyte flow through the individual levels of the electrolysis cell one after the other and are degassed each time after exiting from one level and before entering the next level, the electrolytes being gradually depleted.
  • Approx. 25% hydrochloric acid is supplied to the electrolytic cell both in the anolyte and in the catholyte circuit, the anolyte acid being able to have a somewhat higher concentration.
  • the acid is depleted in several stages to finally 20% hydrochloric acid.
  • the electrolysis is preferably operated at current densities of 4 to 8 kA / m 2 , preferably 5 to 7 kA / m 2 .
  • the different levels of an electrolysis cell are preferably connected in parallel.
  • the acid is preferably first introduced into the top floor of an electrolysis cell and, after exiting from one floor and degassing, is introduced into the next floor below.
  • Each floor is preferably flowed through from bottom to top in order to ensure entrainment and thus accelerated discharge of the gas bubbles.
  • the preferred flow path of anolyte and catholyte is shown in FIG. 2 by the arrows.
  • the specific energy consumption in the electrolysis of hydrochloric acid is reduced, with about 20% of graphite being saved at the same time by reducing the necessary active electrode areas.
  • the electrolysis can be operated at the same voltage with a considerably increased current density.
  • the current density is to be maintained, a voltage gain is achieved which, for example in existing systems, enables an increased number of bipolar electrodes to be connected in series.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (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

Es wird ein Verfahren zur Elektrolyse von Salzsäure zur Herstellung von Chlor und Wasserstoff nach dem Diaphragmaverfahren beschrieben, nachdem die Elektrolyse mehrstufig durchgeführt wird und die Sole nach jeder Elektrolysestufe vor Eintritt in die jeweils nächste Stufe entgast wird. Ferner wird eine für das Verfahren geeignete Elektrolysezelle beschrieben.A method for the electrolysis of hydrochloric acid for the production of chlorine and hydrogen according to the diaphragm method is described after the electrolysis is carried out in several stages and the brine is degassed after each electrolysis stage before entering the next stage. Furthermore, an electrolysis cell suitable for the method is described.

Description

Die elektrolytische Erzeugung von Wasserstoff und Chlor aus Salzsäure erfolgt im allgemeinen in Elektrolysezellen, in denen 30 bis 45 vertikal angeordnete bipolare Elektroden, wobei die zwischen je zwei Elektroden gebildete Elektrolysekammer durch ein Diaphragma unterteilt ist, zusammengefaßt sind. Üblicherweise beträgt die Elektrodenfläche ca. 2,5 m2 und besitzt quadratischen Querschnitt; siehe z.B. DAS 1 216 852 oder Chem. Ing. Technik 39, 731 (1967). Die Salzsäure durchströmt die Elektrolysekammer von unten nach oben, wobei sich im Katholytraum Wasserstoff und im Anolytraum Chlor bildet. Katholyt und Anolyt werden also auf ihrem Weg durch die Elektrolysekammer mit Gasblasen angereichert. Die Gasblasen werden nach dem Austritt der Elektrolyte aus der Zelle abgeschieden.The electrolytic generation of hydrogen and chlorine from hydrochloric acid is generally carried out in electrolytic cells in which 30 to 45 vertically arranged bipolar electrodes are combined, the electrolytic chamber formed between two electrodes being divided by a diaphragm. The electrode area is usually approximately 2.5 m 2 and has a square cross section; see, for example, DAS 1 216 852 or Chem. Ing. Technik 39, 731 (1967). The hydrochloric acid flows through the electrolysis chamber from bottom to top, hydrogen forming in the catholyte space and chlorine in the anolyte space. The catholyte and anolyte are thus enriched with gas bubbles on their way through the electrolysis chamber. The gas bubbles are separated after the electrolytes have left the cell.

Durch die Anwesenheit von Gasblasen im Elektrolyten wird dessen elektrischer Widerstand, und damit der spezifische Leistungsverbrauch der Elektrolysezelle erhöht. Es ist daher wünschenswert, bei gegebener Stromdichte die Aufenthaltszeit des Elektrolyten in der Zelle, d.h. die Zeit, während der sich die Gasblasen anreichern, möglichst kurz zu wählen. Andererseits ist es zum wirtschaftlichen Betrieb der Zelle notwendig, die Konzentration der Salzsäure während des Durchgangs durch die Elektrolysezelle hinreichend zu verarmen. Üblicherweise wird eine Verarmung von ca. 25 % auf ca. 20 % HCl angestrebt.The presence of gas bubbles in the electrolyte increases its electrical resistance and thus the specific power consumption of the electrolytic cell. It is therefore desirable to have the On for a given current density containment time of the electrolyte in the cell, ie the time during which the gas bubbles accumulate should be chosen as short as possible. On the other hand, for the cell to operate economically, it is necessary to sufficiently deplete the concentration of hydrochloric acid as it passes through the electrolytic cell. A depletion of approximately 25% to approximately 20% HCl is usually sought.

Gegenstand der vorliegenden Erfindung ist daher
ein Verfahren zur Herstellung von Chlor und Wasserstoff aus Salzsäure durch Elektrolyse in einer Elektrolysezelle, bestehend aus einer Vielzahl von vertikal angeordneten bipolaren Elektroden, wobei zwischen je zwei Elektroden zur Unterteilung der zwischen diesen gebildeten Elektrolysekammern in einen Anolytraum und einen Katholytraum ein Diaphragma angeordnet ist, ferner Abfluß- und Zuflußeinrichtungen für die Elektrolyte, das dadurch gekennzeichnet ist, daß die Salzsäure in mindestens zwei aufeinanderfolgenden Stufen elektrolysiert wird, wobei sie nach Austritt aus einer Stufe und vor Eintritt in die jeweils nächste Stufe entgast wird.The subject of the present invention is therefore
a process for the production of chlorine and hydrogen from hydrochloric acid by electrolysis in an electrolytic cell, consisting of a plurality of vertically arranged bipolar electrodes, a diaphragm being arranged between two electrodes for dividing the electrolytic chambers formed between them into an anolyte space and a catholyte space Drainage and inflow devices for the electrolytes, which is characterized in that the hydrochloric acid is electrolyzed in at least two successive stages, being degassed after leaving one stage and before entering the next stage.

Gegenstand der vorliegenden Erfindung ist auch eine Salzsäure-Elektrolysezelle, bestehend aus einer Vielzahl von vertikal angeordneten bipolaren Elektroden, wobei zwischen je zwei Elektroden zur Unterteilung der zwischen diesen gebildeten Elektrolysekammer in einen Anolytraum und einen Katholytraum ein Diaphragma angeordnet ist, ferner Abfluß- und Zuflußeinrichtungen für die Elektrolyte, die dadurch gekennzeichnet ist, daß die bipolaren Elektroden und die Elektrolysekammern " jeweils in mindestens einer horizontalen Ebene senkrecht zur Elektrodenfläche in Etagen unterteilt sind und in dieser Ebene zusätzliche Zufluß- und Abflußeinrichtungen für die Elektrolyte vorgesehen sind, so daß in jeder Etage voneinander unabhängige Elektrolytkreisläufe ausgebildet sind. Vorzugsweise beträgt die Höhe der durch die Unterteilung der Elektroden entstehenden Teilelektrodenflächen 40 bis 80 cm, besonders bevorzugt ca. 60 cm.The present invention also relates to a hydrochloric acid electrolysis cell, consisting of a multiplicity of vertically arranged bipolar electrodes, a diaphragm being arranged between two electrodes for dividing the electrolysis chamber formed between them into an anolyte space and a catholyte space, furthermore drainage and inflow devices for the electrolytes, which are characterized in that the bipolar electrodes and the electrolysis chambers "are each divided into floors in at least one horizontal plane perpendicular to the electrode surface and additional inflow and outflow devices for the electrolytes are provided in this plane, so that each floor is separated from one another independent electrolyte circuits are formed. The height of the partial electrode surfaces resulting from the subdivision of the electrodes is preferably 40 to 80 cm, particularly preferably approximately 60 cm.

Zweckmäßigerweise werden die bipolaren Elektroden jeweils in Halterahmen gehalten, die nach Art von Filterpressen aneinander geschichtet werden. Das Prinzip solcher Anordnungen ist z.B. in der DOS 2 222 637 oder DOS 2 317 359 beschrieben. Erfindungsgemäß enthalten die Elektrolyserahmen zur Aufnahme der Elektroden mehrere übereinander liegende Fenster, wobei die Stege Zufluß- und Abflußkanäle für die Elektrolyte enthalten.The bipolar electrodes are expediently each held in holding frames which are stacked together in the manner of filter presses. The principle of such arrangements is e.g. in DOS 2 222 637 or DOS 2 317 359. According to the invention, the electrolysis frames for receiving the electrodes contain a plurality of windows lying one above the other, the webs containing inflow and outflow channels for the electrolytes.

Die Erfindung wird nachfolgend anhand der Figuren näher erläutert. Fig. 1 zeigt beispielhaft einen Querschnitt durch eine zwei etagige Elektrolysezelle. Fig. 2 zeigt stark vereinfacht einen Elektrodenrahmen, senkrecht zu der in Fig. 1 gezeigten Schnittrichtung. Den in den Figuren angegebenen Ziffern kommt im Einzelnen folgende Bedeutung zu:

  • 1 Elektrodenrahmen
  • 2 Bipolare Elektrode
  • 3 Kathode
  • 4 Anode
  • 5 Anolytkammer
  • 6 Katholytkammer
  • 7 Diaphragma
  • 8 Anolytzufuhr
  • 9 Katholytzufuhr
  • 10 Katholyt
  • 11 Anolyt- und Chlorgasableitung
  • 12 Katholytentgasung
  • 13 Anolytentgasung
  • A Anolyt
  • K Katholyt
The invention is explained in more detail below with reference to the figures. Fig. 1 shows an example of a cross section through a two-tier electrolysis cell. FIG. 2 shows, in a highly simplified manner, an electrode frame, perpendicular to the cutting direction shown in FIG. 1. The individual figures given in the figures have the following meanings:
  • 1 electrode frame
  • 2 bipolar electrodes
  • 3 cathode
  • 4 anode
  • 5 anolyte chamber
  • 6 catholyte chamber
  • 7 diaphragm
  • 8 Anolyte supply
  • 9 Catholyte supply
  • 10 catholyte
  • 11 Anolyte and chlorine gas discharge
  • 12 Catholyte degassing
  • 13 Anolyte degassing
  • A anolyte
  • K catholyte

Das erfindungsgemäße Verfahren unter Einsatz der erfindungsgemäßen. Elektrolysezelle, wird so betrieben, daß sowohl Katholyt als auch Anolyt die einzelnen Etagen der Elektrolysezelle nacheinander durchströmen und jeweils nach Austritt aus einer Etage und vor Eintritt in die nächste Etage entgast werden, wobei die Elektrolyte stufenweise verarmt werden. Der Elektrolysezelle wird sowohl im Anolyt- als auch im Katholytkreislauf ca. 25 %ige Salzsäure zugeführt, wobei die Anolytsäure eine etwas höhere Konzentration aufweisen kann. Die Säure wird in mehreren Stufen auf schließlich 20 %ige Salzsäure verarmt.The inventive method using the inventive. Electrolysis cell is operated in such a way that both catholyte and anolyte flow through the individual levels of the electrolysis cell one after the other and are degassed each time after exiting from one level and before entering the next level, the electrolytes being gradually depleted. Approx. 25% hydrochloric acid is supplied to the electrolytic cell both in the anolyte and in the catholyte circuit, the anolyte acid being able to have a somewhat higher concentration. The acid is depleted in several stages to finally 20% hydrochloric acid.

Die Elektrolyse wird vorzugsweise bei Stromdichten von 4 bis 8 kA/m2, vorzugsweise 5 bis 7 kA/m2 betrieben. Dabei werden vorzugsweise die verschiedenen Etagen einer Elektrolysezelle parallel geschaltet.The electrolysis is preferably operated at current densities of 4 to 8 kA / m 2 , preferably 5 to 7 kA / m 2 . The different levels of an electrolysis cell are preferably connected in parallel.

Um Druckdifferenzen in den Elektrolyten zu vermeiden, wird die Säure vorzugsweise zunächst in die oberste Etage einer Elektrolysezelle eingeführt und nach dem Austritt aus einer Etage und Entgasung jeweils in die nächste darunter liegende Etage eingeführt. Jede Etage wird vorzugsweise von unten nach oben durchströmt, um so eine Mitnahme und damit einen beschleunigten Austrag der Gasblasen zu gewährleisten. Für den Fall einer zwei-etagigen Elektrolysezelle ist der bevorzugte Strömungsweg von Anolyt und Katholyt in Fig. 2 durch die eingezeichneten Pfeile dargestellt.In order to avoid pressure differences in the electrolytes, the acid is preferably first introduced into the top floor of an electrolysis cell and, after exiting from one floor and degassing, is introduced into the next floor below. Each floor is preferably flowed through from bottom to top in order to ensure entrainment and thus accelerated discharge of the gas bubbles. In the case of a two-tier electrolysis cell, the preferred flow path of anolyte and catholyte is shown in FIG. 2 by the arrows.

Mit der Erfindung wird der spezifische Energieverbrauch bei der Elektrolyse von Salzsäure herabgesetzt, wobei gleichzeitig durch Verringerung der notwendigen aktiven Elektrodenflächen etwa 20 % Graphit eingespart wird. Die Elektrolyse kann gegenüber den bisher üblichen Stromdichten von ca. 4 kA/m2 bei gleicher Spannung mit erheblich erhöhter Stromdichte betrieben werden. Andererseits wird, wenn die Stromdichte erhalten bleiben soll, ein Spannungsgewinn erreicht, der z.B. bei bestehenden Anlagen die Hintereinanderschaltung von einer erhöhten Zahl von bipolaren Elektroden ermöglicht.With the invention, the specific energy consumption in the electrolysis of hydrochloric acid is reduced, with about 20% of graphite being saved at the same time by reducing the necessary active electrode areas. Compared to the current densities of approx. 4 kA / m 2 which have been customary up to now, the electrolysis can be operated at the same voltage with a considerably increased current density. On the other hand, if the current density is to be maintained, a voltage gain is achieved which, for example in existing systems, enables an increased number of bipolar electrodes to be connected in series.

Claims (5)

1. Verfahren zur Herstellung von Chlor und Wasserstoff aus Salzsäure durch Elektrolyse in einer Elektrolysezelle bestehend aus einer Vielzahl von vertikal angeordneten bipolaren Elektroden, wobei zwischen je zwei Elektroden zur Unterteilung der zwischen diesen gebildeten Elektrolysekammern in einen Anolytraum und einen Katholytraum ein Diaphragma angeordnet ist, ferner Abfluß- und Zuflußeinrichtungen für die Elektrolyte, dadurch gekennzeichnet, daß die Salzsäure in mindestens zwei aufeinanderfolgenden Stufen elektrolysiert wird, wobei sie nach Austritt aus einer Stufe und vor Eintritt in die jeweils nächste Stufe entgast wird.1. A method for producing chlorine and hydrogen from hydrochloric acid by electrolysis in an electrolytic cell consisting of a plurality of vertically arranged bipolar electrodes, a diaphragm being arranged between two electrodes for dividing the electrolytic chambers formed between them into an anolyte space and a catholyte space Drainage and inflow devices for the electrolytes, characterized in that the hydrochloric acid is electrolyzed in at least two successive stages, being degassed after leaving one stage and before entering the next stage. 2. Salzsäure-Elektrolysezelle bestehend aus einer Vielzahl von vertikal angeordneten bipolaren Elektroden, wobei zwischen je zwei Elektroden zur Unterteilung der zwischen diesen gebildeten Elektrolysekammer in einen Anolytraum und einen Katholytraum ein Diaphragma angeordnet ist, ferner Abfluß- und Zuflußeinrichtungen für die Elektrolyte, dadurch gekennzeichnet, daß die bipolaren Elektroden und Elektrolysekammern jeweils in mindestens einer horizontalen Ebene senkrecht zur Elektrodenfläche in Etagen unterteilt sind und in dieser Ebene zusätzliche Zufluß- und Abflußeinrichtungen für die Elektrolyte vorgesehen sind, so daß in jeder Etage voneinander unabhängige Elektrolytkreisläufe ausgebildet sind.2. hydrochloric acid electrolysis cell consisting of a multiplicity of vertically arranged bipolar electrodes, a diaphragm being arranged between two electrodes for dividing the electrolysis chamber formed between them into an anolyte space and a catholyte space, furthermore drainage and inflow devices for the electrolytes, characterized in that that the bipolar electrodes and electrolysis chambers are each divided into floors in at least one horizontal plane perpendicular to the electrode surface and additional inflow and outflow devices are provided in this plane for the electrolytes, so that independent electrolyte circuits are formed on each floor. 3. Elektrolysezelle nach Anspruch 2, wobei die Höhe der durch Unterteilung der Elektroden entstehenden Teilelektrodenflächen 40 bis 80 cm, vorzugsweise ca. 60 cm beträgt.3. Electrolytic cell according to claim 2, wherein the height of the partial electrode surfaces resulting from subdivision of the electrodes is 40 to 80 cm, preferably approximately 60 cm. 4. Verfahren zum Betrieb der Elektrolysezelle nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Elektrolyte die Etagen der Elektrolysezelle nacheinander durchströmen und jeweils nach Austritt aus einer Etage und vor Eintritt in die nächste Etage entgast werden, wobei die Elektrolyte stufenweise verarmt werden.4. The method for operating the electrolytic cell according to claim 2 or 3, characterized in that the electrolytes flow through the floors of the electrolytic cell one after the other and are degassed each time after exiting from one floor and before entering the next floor, the electrolytes being gradually depleted. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Elektrolyte zunächst die oberste Etage einer Zelle und nachfolgend jeweils die nächst tiefere Etage durchströmen, wobei jede Etage von unten nach oben durchströmt wird.5. The method according to claim 4, characterized in that the electrolytes first flow through the top floor of a cell and then in each case to the next lower floor, each floor being flowed through from bottom to top.
EP79101017A 1978-04-14 1979-04-04 Method for preparing chlorine by electrolysis of hydrochloric acid, and electrolytic cell therefor Expired EP0004903B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2816152 1978-04-14
DE2816152A DE2816152C2 (en) 1978-04-14 1978-04-14 Process for the production of chlorine from hydrochloric acid by electrolysis and hydrochloric acid electrolysis cell

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EP0004903A2 true EP0004903A2 (en) 1979-10-31
EP0004903A3 EP0004903A3 (en) 1979-11-14
EP0004903B1 EP0004903B1 (en) 1980-12-10

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EP79101017A Expired EP0004903B1 (en) 1978-04-14 1979-04-04 Method for preparing chlorine by electrolysis of hydrochloric acid, and electrolytic cell therefor

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US (1) US4236983A (en)
EP (1) EP0004903B1 (en)
JP (1) JPS54137496A (en)
DE (2) DE2816152C2 (en)
ES (1) ES479479A1 (en)

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JPS6039757B2 (en) * 1979-02-02 1985-09-07 クロリンエンジニアズ株式会社 Hydrochloric acid electrolysis method
DE2908269C2 (en) * 1979-03-02 1984-04-26 Uhde Gmbh, 4600 Dortmund Hydrochloric acid electrolysis cell
IN156372B (en) * 1980-05-15 1985-07-06 Ici Plc
DE3041897A1 (en) * 1980-11-06 1982-06-09 Bayer Ag, 5090 Leverkusen SALT ACID ELECTROLYSIS CELL FOR THE PRODUCTION OF CHLORINE AND HYDROGEN
US4402809A (en) * 1981-09-03 1983-09-06 Ppg Industries, Inc. Bipolar electrolyzer
US4999284A (en) * 1988-04-06 1991-03-12 E. I. Du Pont De Nemours And Company Enzymatically amplified piezoelectric specific binding assay
US5501986A (en) * 1988-04-06 1996-03-26 E. I. Du Pont De Nemours And Company Piezoelectric specific binding assay with mass amplified reagents
US5348579A (en) * 1993-08-11 1994-09-20 Silberline Manufacturing Co., Inc. Water resistant metal pigment-containing paste and method for making
DE19956787A1 (en) * 1999-11-25 2001-05-31 Bayer Ag Electrolysis plate
ITMI20012003A1 (en) * 2001-09-27 2003-03-27 De Nora Elettrodi Spa DIAPHRAGM CELL FOR THE PRODUCTION OF CHLOR-SODA OF INCREASED ELECTRODICAL SURFACE AND METHOD TO REALIZE IT
CN100557085C (en) * 2007-06-28 2009-11-04 马来西亚大光蓄电池有限公司 The tandem type electrolytic tank that no lead connects
CN112759036A (en) * 2020-12-28 2021-05-07 云南驰宏国际锗业有限公司 Method for treating hydrochloric acid wastewater by electrolysis method and electrolytic cell for hydrochloric acid wastewater electrolysis

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FR358245A (en) * 1905-10-03 1906-02-02 Eugene Francois Cote Method of manufacturing chlorine by electrolysis of hydrochloric acid
DE2162487A1 (en) * 1971-12-16 1973-06-28 Dow Chemical Co Chlorine prepn - by electrolysis of hydrochloric acid and polyvalent metal chlorides
DE2222637A1 (en) * 1972-05-09 1973-11-29 Bayer Ag SUPPORTING FRAME FOR ELECTRODES OF ELECTROLYSIS DEVICES

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CA743083A (en) * 1966-09-20 S. Kircher Morton Electrolytic cell
US1485461A (en) * 1922-07-13 1924-03-04 Knowles Albert Edgar Electrolytic cell
US2719822A (en) * 1952-01-10 1955-10-04 Universal Oil Prod Co Production of chlorine from hydrogen chloride
US3236760A (en) * 1959-11-09 1966-02-22 Oronzio De Nora Impianti Cells for the production of chlorine from hydrochloric acid
IT1004132B (en) * 1973-04-06 1976-07-10 Bayer Ag FRAME DEVICE FOR ELECTRO LYSIS OF HCI WITH GRAPHITE PLATE
US3876517A (en) * 1973-07-20 1975-04-08 Ppg Industries Inc Reduction of crevice corrosion in bipolar chlorine diaphragm cells by locating the cathode screen at the crevice and maintaining the titanium within the crevice anodic

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR358245A (en) * 1905-10-03 1906-02-02 Eugene Francois Cote Method of manufacturing chlorine by electrolysis of hydrochloric acid
DE2162487A1 (en) * 1971-12-16 1973-06-28 Dow Chemical Co Chlorine prepn - by electrolysis of hydrochloric acid and polyvalent metal chlorides
DE2222637A1 (en) * 1972-05-09 1973-11-29 Bayer Ag SUPPORTING FRAME FOR ELECTRODES OF ELECTROLYSIS DEVICES

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ES479479A1 (en) 1979-07-16
DE2816152C2 (en) 1980-07-03
DE2816152B1 (en) 1979-10-18
US4236983A (en) 1980-12-02
EP0004903B1 (en) 1980-12-10
EP0004903A3 (en) 1979-11-14
JPS54137496A (en) 1979-10-25
DE2960061D1 (en) 1981-02-19

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