US3696010A - Method and apparatus for removing gas from an alkaline chloride electrolysis cell - Google Patents

Method and apparatus for removing gas from an alkaline chloride electrolysis cell Download PDF

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Publication number
US3696010A
US3696010A US66441A US3696010DA US3696010A US 3696010 A US3696010 A US 3696010A US 66441 A US66441 A US 66441A US 3696010D A US3696010D A US 3696010DA US 3696010 A US3696010 A US 3696010A
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US
United States
Prior art keywords
foam
brine
cell
gas
electrolysis cell
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
Application number
US66441A
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English (en)
Inventor
Franz Glos
Joachim Mischke
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
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
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Publication of US3696010A publication Critical patent/US3696010A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
    • C25B1/36—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in mercury cathode cells
    • 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
    • C25B11/033—Liquid electrodes
    • 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
    • C25B9/30—Cells comprising movable electrodes, e.g. rotary electrodes; Assemblies of constructional parts thereof
    • C25B9/303—Cells comprising movable electrodes, e.g. rotary electrodes; Assemblies of constructional parts thereof comprising horizontal-type liquid electrode
    • 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

Definitions

  • One known method of satisfying this requirement is to suck out the foam from the upper part of the cell.
  • the disadvantage of this method is the fast that, as a result, there will be underpressure or a partial vacuum within the cell and, in case of a leakage, air will penetrate into the cell. Air acts as an inert gas and will adversely affect the chlorine liquefaction process.
  • a mechanical device is also known, with the aid of which the foam is scooped into so-called foam separators where brine and gas are separated.
  • mechanical devices are costly and prone to faults owing to the corrosive process fluids with which they come in contact, such as chlorine and brine.
  • the present invention provides a method and apparatus that will permit a quick and eflicient removal of foam from the upper part of the cell in a simple manner and without the use of additional mechanical means, so as to prevent the foam from accumulating to an extent that the Whole anode is enveloped with foam thus impeding the formation of gaseous chlorine on the underside of the anode.
  • the task is achieved by discharging the chlorine gas in the immediate vicinity of the area where it forms through a plurality of apertures in each side wall of the cell.
  • the plurality of apetures in each side wall of the cell for the purpose of removing chlorine gas foam are connected to a foam collecting pipe arranged along each side wall.
  • the particular advantage attained through the invention is that the advantages achieved by the distribution of brine at the anode and the removal of gaseous chlorine from the anode according to US. patent. application, Ser. No. 790,337, become fully effective, since the foam can be removed continuously and at the desired rate from the upper part of the cell.
  • the foam discharge pipes at each side wall are arranged in such a manner that a certain number of anodes are apportioned to each set of two foam discharge pipes arranged opposite each other.
  • FIG. 1 is a cross sectional view of an alkaline chloride electrolysis cell taken substantially on the line 1-1 of FIG. 3;
  • FIG. 2 is a side elevational view of the cell showing pipes leading therefrom to a separation tank or vessel;
  • FIG. 3 is a top plan view of the cell shown on FIG. 2.
  • the illustrated embodiment of the invention comprises an alkaline chloride electrolysis cell in which the brine is introduced through a supply pipe 1 which has a series of branch pipes 2.
  • the brine enters the reaction space through the hollow stems of the anodes 3, and the anode plates.
  • the mercury cathode floats on the brine and the chlorine gas collects in the upper part 4 of the cell and flows therefrom through side wall apertures 5 from which lead vertical discharge pipes 6.
  • the pipes extend downwardly and connect to horizontal foam collecting pipes 7 which, as shown, are sectional, the diameters of each section increasing toward the discharge end.
  • the discharge end of the pipes 7 connect to the upper side of a tank 8 in which the chlorine gas is separated from the brine by addition of diluted hydrochloric acid and by centrifugal action.
  • the chlorine gas is discharged from the tank 8 through a nozzle 9 at the upper side and the brine flows away through a nozzle 10 at the under side.
  • apertures 5 are arranged opposite to each other.
  • a certain number of anodes are apportioned to each set of foam discharge pipes 6, which are arranged opposite each other, one for each side of the reaction chamber.
  • a method of removing chlorine gas mixed with brine in the form of foam from an alkaline chloride electrolysis cell which consists in feeding brine to a reaction chamber interposed between separated anode surfaces and a mercury cathode so that the brine is distributed over each anode surface resulting in gas-brine foam, gravitationally flowing the foam through downwardly directed conduits leading from the immediate vicinity of the reaction chamber, and conducting the foam from said conduits to a gas-brine separating station.
  • a housing providing a reaction chamber haveach side and to which the respective discharge pipes are connected, a tank to which each collecting pipe is connected, and gas and brine discharge nozzles respectively on said tank.

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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)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
US66441A 1969-10-24 1970-08-24 Method and apparatus for removing gas from an alkaline chloride electrolysis cell Expired - Lifetime US3696010A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691953627 DE1953627A1 (de) 1969-10-24 1969-10-24 Verfahren und Vorrichtung zur Elektrolyse von Alkalimetallchloridloesungen

Publications (1)

Publication Number Publication Date
US3696010A true US3696010A (en) 1972-10-03

Family

ID=5749135

Family Applications (1)

Application Number Title Priority Date Filing Date
US66441A Expired - Lifetime US3696010A (en) 1969-10-24 1970-08-24 Method and apparatus for removing gas from an alkaline chloride electrolysis cell

Country Status (5)

Country Link
US (1) US3696010A (fr)
DE (1) DE1953627A1 (fr)
FR (1) FR2090450A6 (fr)
GB (1) GB1334678A (fr)
NL (1) NL7013618A (fr)

Also Published As

Publication number Publication date
GB1334678A (en) 1973-10-24
DE1953627A1 (de) 1971-05-06
FR2090450A6 (fr) 1972-01-14
NL7013618A (fr) 1971-04-27

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