US3378480A - Process for clamping and tightening diaphragms in filter press type cells for the electrolysis of aqueous hydrochloric acid - Google Patents

Process for clamping and tightening diaphragms in filter press type cells for the electrolysis of aqueous hydrochloric acid Download PDF

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Publication number
US3378480A
US3378480A US475733A US47573365A US3378480A US 3378480 A US3378480 A US 3378480A US 475733 A US475733 A US 475733A US 47573365 A US47573365 A US 47573365A US 3378480 A US3378480 A US 3378480A
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Prior art keywords
clamping
electrolysis
diaphragms
tightening
hydrochloric acid
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Expired - Lifetime
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US475733A
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Reinshagen Paul
Schmidt Heinz
Ziemer Waldemar
Henkel Heinrich
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Hoechst AG
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Hoechst 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
    • 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 present invention relates to a process for clamping and tightening diaphragms in filter press type cells for the electrolysis of aqueous hydrochloric acid.
  • the anode chambers are separated from the cathode chambers by diaphragms made of fabrics that are resistant to chlorine. These fabrics are clamped between the electrode frames by means of elastic packings. The packings simultaneously serve to seal the electrolysis chambers and to fasten the diaphragms along their rims.
  • the packing is designed as a frame of soft rubber which is pressed between the electrode frames.
  • the diaphragm is inserted into a slot of the packing and secured by bonding or sewing.
  • One side of each of the frames of the bipolar electrodes is provided with pins serving for the fixation of the packing frame.
  • the soft rubber packing is resistant to chlorine to a limited extent only. There is a danger that the sewn or bonded seams gradually become pervious, so that chlorine and hydrogen may mix with one another.
  • Other packing materials for example, polytetrafiuoroethylene, cannot be used in the above-described form for technical and economical reasons.
  • the packing frame is a complicated profilated piece which is consequently very expensive and which after a diaphragm has been exchanged can no longer be used. Moreover, it is diflicult to adapt the suspension eyes of the packing frame exactly to the dimensions of, and the distances between, the pins arranged on the electrode frame.
  • the packing is advantageously made of an appropriate elastic material that is resistant to chemical substances, for example, rubber, impregnated asbestos or asbestos coated with polytetrafiuoroethylene or soft polyvinyl chloride.
  • the packing is used in the form of an endless cord. Its cross-section is of little importance and may be, for example, quadrangular, trapezoidal or round.
  • an electrode frame 1 is provided on one side with a groove 2 into which a diaphragm 3 is inserted.
  • the diaphragm is fixed by means of a V- ledge 4. If any material of the diaphragm should project at A it is removed.
  • An endless packing 5 is then inserted and pressed firmly against neighbouring electrode 1a. Owing to this operation the packing is pressed against electrode 1 between A and B and against electrode in between C and D and makes the electrode chambers tight to gases and liquids.
  • a process for clamping and tightening diaphragms in filter press type cells for the electrolysis of aqueous hydrochloric acid which comprises inserting the diaphragm into a groove of the electrode frame and clamping it with a V-ledge, then inserting an endless packing cord into the groove and pressing it against the frame of the neighbouring electrode.

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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)

Description

8 April 18,1968 P, REWSHAGEN ET AL 3,378,480
PROCESS FOR GLAMPING AND TIGHTENING DIAPHRAGMS IN FILTER PRESS TYPE CELLS FOR THE ELECTROLYSIS OF AQUEOUS HYDROCHLORIC ACID Filed July 29, 1965 PAUL REiNSHAGEN HEINZ SCHMIDT WALDEMAR ZIEMER HEINRICH HENKEL ATTORNEYS United States Patent 0 M 1 Claim. (Cl: 264-453) The present invention relates to a process for clamping and tightening diaphragms in filter press type cells for the electrolysis of aqueous hydrochloric acid.
In the known filter press type cells for the electrolysis of aqueous hydrochloric acid the anode chambers are separated from the cathode chambers by diaphragms made of fabrics that are resistant to chlorine. These fabrics are clamped between the electrode frames by means of elastic packings. The packings simultaneously serve to seal the electrolysis chambers and to fasten the diaphragms along their rims.
According to the latest known embodiment the packing is designed as a frame of soft rubber which is pressed between the electrode frames. The diaphragm is inserted into a slot of the packing and secured by bonding or sewing. One side of each of the frames of the bipolar electrodes is provided with pins serving for the fixation of the packing frame.
The aforesaid kind of fixation and packing, however, has considerable disadvantages.
The soft rubber packing is resistant to chlorine to a limited extent only. There is a danger that the sewn or bonded seams gradually become pervious, so that chlorine and hydrogen may mix with one another. Other packing materials, for example, polytetrafiuoroethylene, cannot be used in the above-described form for technical and economical reasons.
Because of the elasticity of the packing frame it is very difficult and time-consuming to stretch the diaphragm without the formation of creases when fixing it to the packing frame and inserting it into the cell.
The packing frame is a complicated profilated piece which is consequently very expensive and which after a diaphragm has been exchanged can no longer be used. Moreover, it is diflicult to adapt the suspension eyes of the packing frame exactly to the dimensions of, and the distances between, the pins arranged on the electrode frame.
3,378,489 Patented Apr. 16, 1968 Now we have found that the aforesaid disadvantages can be avoided by providing one side of the electrode frame with a groove, placing the diaphragm into this groove and clamping it with a V-ledge, then inserting a packing cord and pressing it against the frame of the neighbouring electrode.
The packing is advantageously made of an appropriate elastic material that is resistant to chemical substances, for example, rubber, impregnated asbestos or asbestos coated with polytetrafiuoroethylene or soft polyvinyl chloride. The packing is used in the form of an endless cord. Its cross-section is of little importance and may be, for example, quadrangular, trapezoidal or round.
The clamping and tightening of the diaphragm according to the invention will now be described in greater detail by way of example only with reference to the accompanying drawing.
Referring to the drawing, an electrode frame 1 is provided on one side with a groove 2 into which a diaphragm 3 is inserted. The diaphragm is fixed by means of a V- ledge 4. If any material of the diaphragm should project at A it is removed. An endless packing 5 is then inserted and pressed firmly against neighbouring electrode 1a. Owing to this operation the packing is pressed against electrode 1 between A and B and against electrode in between C and D and makes the electrode chambers tight to gases and liquids.
When applying the process according to the invention it is no longer ditiicult to insert and clamp in the diaphragm without the formation of creases. The complicated and tedious insertion of the diaphragm into the packing frame and its sewing or bonding can be dispensed with. No pins and eyes are required for fixing the packing, so that the difiiculties which have hitherto been encountered when adjusting the dimensions and distances are also overcome. Moreover, the process according to the invention enables time and expenses to be saved.
We claim:
1. A process for clamping and tightening diaphragms in filter press type cells for the electrolysis of aqueous hydrochloric acid, which comprises inserting the diaphragm into a groove of the electrode frame and clamping it with a V-ledge, then inserting an endless packing cord into the groove and pressing it against the frame of the neighbouring electrode.
References Cited UNITED STATES PATENTS 5/1961 Crean 204-257 XR 8/1967 Isreeli 210-321

Claims (1)

1. A PROCESS FOR CLAMPING AND TIGHTENING DIAPHRAGMS IN FILTER PRESS TYPE CELLS FOR THE ELECTROLYSIS OF AQUEOUS HYDROCHLORIC ACID, WHICH COMPRISES INSERTING THE DIAPHRAGM INTO A GROOVE OF THE ELECTRODE FRAME AND CLAMPING IT WITH A V-LEDGE, THEN INSERTING AN ENDLESS PACKING CORD INTO THE GROOVE AND PRESSING IT AGAINST THE FRAME OF THE NEIGHBORING ELECTRODE.
US475733A 1964-07-30 1965-07-29 Process for clamping and tightening diaphragms in filter press type cells for the electrolysis of aqueous hydrochloric acid Expired - Lifetime US3378480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF43615A DE1230771B (en) 1964-07-30 1964-07-30 Process for clamping and sealing the diaphragms in cells of the filter press type for the electrolysis of aqueous hydrochloric acid

Publications (1)

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US3378480A true US3378480A (en) 1968-04-16

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US (1) US3378480A (en)
JP (1) JPS4819797B1 (en)
BE (1) BE667650A (en)
DE (1) DE1230771B (en)
GB (1) GB1069335A (en)
NL (1) NL148954B (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979297A (en) * 1973-05-29 1976-09-07 Rhone-Poulenc S.A. Membrane support-plates for fluid separating apparatus and apparatus using such support-plates
US4026782A (en) * 1974-07-29 1977-05-31 Rhone-Poulenc Industries Electrolysis cell having bipolar elements
US4332661A (en) * 1980-11-05 1982-06-01 Olin Corporation Cells having gasket lubricating means
US4368109A (en) * 1980-11-05 1983-01-11 Olin Corporation Electrolytic cell with inter-electrode spacer means
WO1986001838A1 (en) * 1984-09-24 1986-03-27 The Dow Chemical Company Seal for electrolytic cells
US4748092A (en) * 1987-01-02 1988-05-31 Continental Can Company, Inc. Frame for a cell construction
US4751153A (en) * 1987-01-02 1988-06-14 Continental Can Company, Inc. Frame for a cell construction
US4822460A (en) * 1984-11-05 1989-04-18 The Dow Chemical Company Electrolytic cell and method of operation
US4877499A (en) * 1984-11-05 1989-10-31 The Dow Chemical Company Membrane unit for electrolytic cell
US4886586A (en) * 1988-09-26 1989-12-12 The Dow Chemical Company Combination electrolysis cell seal member and membrane tentering means for a filter press type electrolytic cell
US4892632A (en) * 1988-09-26 1990-01-09 The Dow Chemical Company Combination seal member and membrane holder for an electrolytic cell
US4898653A (en) * 1988-09-26 1990-02-06 The Dow Chemical Company Combination electrolysis cell seal member and membrane tentering means
US4915803A (en) * 1988-09-26 1990-04-10 The Dow Chemical Company Combination seal and frame cover member for a filter press type electrolytic cell
US4940518A (en) * 1988-09-26 1990-07-10 The Dow Chemical Company Combination seal member and membrane holder for a filter press type electrolytic cell

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2503215C2 (en) * 1975-01-27 1986-08-07 Keramchemie GmbH, 5433 Siershahn Device for the electrolysis of hydrochloric acid
DE3221371C2 (en) * 1982-06-05 1985-12-19 JV Kunststoffwerk GmbH, 8544 Georgensgmünd Electrode frames for the electrolytic extraction or refining of metals

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983656A (en) * 1959-02-10 1961-05-09 Socony Mobil Oil Co Inc Electrolytic method of purifying amine solutions
US3333706A (en) * 1964-11-16 1967-08-01 Technicon Instr Dialyzer assembling means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983656A (en) * 1959-02-10 1961-05-09 Socony Mobil Oil Co Inc Electrolytic method of purifying amine solutions
US3333706A (en) * 1964-11-16 1967-08-01 Technicon Instr Dialyzer assembling means

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3979297A (en) * 1973-05-29 1976-09-07 Rhone-Poulenc S.A. Membrane support-plates for fluid separating apparatus and apparatus using such support-plates
US4026782A (en) * 1974-07-29 1977-05-31 Rhone-Poulenc Industries Electrolysis cell having bipolar elements
US4332661A (en) * 1980-11-05 1982-06-01 Olin Corporation Cells having gasket lubricating means
US4368109A (en) * 1980-11-05 1983-01-11 Olin Corporation Electrolytic cell with inter-electrode spacer means
WO1986001838A1 (en) * 1984-09-24 1986-03-27 The Dow Chemical Company Seal for electrolytic cells
US4610765A (en) * 1984-09-24 1986-09-09 The Dow Chemical Company Seal means for electrolytic cells
US4877499A (en) * 1984-11-05 1989-10-31 The Dow Chemical Company Membrane unit for electrolytic cell
US4822460A (en) * 1984-11-05 1989-04-18 The Dow Chemical Company Electrolytic cell and method of operation
US4751153A (en) * 1987-01-02 1988-06-14 Continental Can Company, Inc. Frame for a cell construction
US4748092A (en) * 1987-01-02 1988-05-31 Continental Can Company, Inc. Frame for a cell construction
US4886586A (en) * 1988-09-26 1989-12-12 The Dow Chemical Company Combination electrolysis cell seal member and membrane tentering means for a filter press type electrolytic cell
US4892632A (en) * 1988-09-26 1990-01-09 The Dow Chemical Company Combination seal member and membrane holder for an electrolytic cell
US4898653A (en) * 1988-09-26 1990-02-06 The Dow Chemical Company Combination electrolysis cell seal member and membrane tentering means
US4915803A (en) * 1988-09-26 1990-04-10 The Dow Chemical Company Combination seal and frame cover member for a filter press type electrolytic cell
US4940518A (en) * 1988-09-26 1990-07-10 The Dow Chemical Company Combination seal member and membrane holder for a filter press type electrolytic cell

Also Published As

Publication number Publication date
DE1230771B (en) 1966-12-22
BE667650A (en) 1966-01-31
GB1069335A (en) 1967-05-17
NL148954B (en) 1976-03-15
JPS4819797B1 (en) 1973-06-15
NL6509903A (en) 1966-01-31

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