EP1103636A1 - Plaque pour cellule d'électrolyse - Google Patents

Plaque pour cellule d'électrolyse Download PDF

Info

Publication number
EP1103636A1
EP1103636A1 EP00124257A EP00124257A EP1103636A1 EP 1103636 A1 EP1103636 A1 EP 1103636A1 EP 00124257 A EP00124257 A EP 00124257A EP 00124257 A EP00124257 A EP 00124257A EP 1103636 A1 EP1103636 A1 EP 1103636A1
Authority
EP
European Patent Office
Prior art keywords
electrolysis
plate
electrolysis plate
plastic
frame
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Withdrawn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
EP00124257A
Other languages
German (de)
English (en)
Inventor
Bernd Dr. Bressel
Hans-Joachim Kramann
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.)
Covestro Deutschland AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of EP1103636A1 publication Critical patent/EP1103636A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • C25B9/77—Assemblies comprising two or more cells of the filter-press type having diaphragms
    • 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
    • C25B9/75—Assemblies comprising two or more cells of the filter-press type having bipolar electrodes

Definitions

  • the invention does not relate to an electrolysis plate consisting of an outer conductive frame, in particular made of a fiber-reinforced cresol resin, one in it stored, electrically conductive, bipolar, preferably slotted on both sides Graphite plate, the plastic aprons in the area of the electrolyte supply Has positive guidance for the electrolyte solutions.
  • the invention further relates to Electrolysers built on the basis of the electrolysis plate mentioned.
  • electrolysers for example hydrochloric acid electrolyzers
  • electrolysis plates in the form of frame elements which carry electrically conductive, bipolar graphite plates as an anode / cathode.
  • the frame elements are generally arranged in blocks of typically 32 or 38 plates and thereby form a unit as an electrolyzer with 31 or 37 electrolysis cells for the electrolysis of, for example, hydrochloric acid to chlorine gas and hydrogen gas, which are operated at current densities of up to 4,800 A / m 2 .
  • the hydrochloric acid is fed through the frame from the passages in the lower area of the frame elements via specially arranged holes on the anolyte or catholyte side from below into the anolyte or catholyte space and in the upper area of the frame elements through outlet holes in the upper passages Frame elements derived together with the gases generated.
  • Known electrolysis elements are, depending on the current density, from 130 1 / h to 180 1 / h Anolyte and catholyte acid supplied.
  • the 60 - 80 ° C hot hydrochloric acid meets that Diaphragm separating anolyte space from catholyte space and redistributes itself Redirection e.g. on the diaphragm via the slots in the graphite or the channel randomly between frame and graphite plate.
  • the object of the invention is to provide an electrolysis element that has the disadvantages avoids the known construction and a comparable longer service life having.
  • the object is achieved in that in an electrolysis element the anolyte and catholyte side of the electrolysis element by attaching an inert film, in particular made of polyvinyl difluoride or a polyfluorocarbon to protect the diaphragm or membrane against chemical, thermal and mechanical corrosion by the from the in Electrolytic element existing holes impinging anolyte and catholyte beam is protected.
  • an inert film in particular made of polyvinyl difluoride or a polyfluorocarbon to protect the diaphragm or membrane against chemical, thermal and mechanical corrosion by the from the in Electrolytic element existing holes impinging anolyte and catholyte beam is protected.
  • the invention relates to an electrolysis plate consisting of an outer non-conductive frame, in particular consisting of a fiber-reinforced cresol resin, an electrically conductive, bipolar, preferably slotted on both sides Graphite plate that plastic aprons in the area of the electrolyte feed for positive guidance for the electrolyte solutions.
  • the structure of the frame element preferably corresponds to the one as it is is known from the document DT 23 27 883, which is hereby included as a disclosure is.
  • the invention further relates to electrolysers based on the abovementioned Electrolysis plate.
  • the electrolysis plate with plastic aprons is preferred in the hydrochloric acid electrolysis used as forced acid control for the hydrochloric acid inlets on both sides.
  • the electrically conductive, bipolar graphite plate is on the non-conductive frame assembled.
  • the electrolysis plate essentially contains one anodic side, one cathodic side, holes, an electrolyte supply and plastic aprons.
  • the size of the electrolysis plate corresponds approximately to the size of known electrolysis plates and can depend on the desired application of the electrolysis plate vary.
  • the plastic aprons are made of inert foils in the area of the electrolyte supply are attached. They are designed in such a way that the Electrolyte solutions are achieved in such a way that the plastic aprons are a diaphragm or a membrane from chemical, thermal and mechanical destruction protect the anolyte and catholyte currents usually in electrolysers cause conventional design.
  • the penetration of anolyte acid or Catholyte acid significantly reduced by a diaphragm reducing product quality is significantly increased, for example when using the invention Electrolysis plate significantly less in the electrolysis of hydrochloric acid Hydrogen in chlorine or significantly less chlorine in hydrogen.
  • the size of the Plastic aprons can vary and depend primarily on the size of the electrically conductive, bipolar graphite plate.
  • the construction of the electrolyte supply, in particular acid conduction, is like this effective that they have a direct impact on the acid after about 20 - 100 months Use observed damage areas, e.g. on the diaphragms, safely prevented.
  • Triangular corner pieces are preferred in front of the acid entry peaks in the Electrolysis plate installed.
  • the installed foils are preferably made of polytetrafluoroethylene (PTFE) or PVDF (polyvinylidene fluoride) manufactured.
  • PTFE polytetrafluoroethylene
  • PVDF polyvinylidene fluoride
  • the incorporation of the forced acid control according to the invention surprisingly showed additionally a significant voltage reduction of 3% - 8% per electrolyzer with increasing plant load compared to electrolyzers without forced acid control and significantly increases the economy of hydrochloric acid electrolysis.
  • the diaphragm preferably consists of e.g. tightly woven, thermostabilized Polyvinyl chloride or polyvinyl difluoride or a blend of PVC and PVDF or is in particular a membrane made of a sulfonated fluorocarbon.
  • a hydrochloric acid electrolyzer has the one shown in principle in FIG. 1 in a side view Construction. The electrolyser is shown broken open in the middle.
  • the electrolyzer consisting of 32 by means of clamping bolts 2, is on a supporting frame 1 compressed electrolysis plates 4 built.
  • the electrolysis plates 4 have Passages passing through the electrolyser at the bottom right and left 9 for the catholyte acid and feedthroughs 10 for the anolyte acid, which be supplied with fresh acid.
  • Busbars 3 are provided, which the connections for the graphite anodes or -Electively contact cathodes with a power supply, not shown.
  • FIG. 2 shows the basic structure of an electrolysis plate 4. Bores 11 connect the passages 9 for the catholyte with the respective catholyte space and holes 12 the passages 10 for the anolyte with the corresponding Anolyte space.
  • the hydrochloric acid passes through the cathode or anode compartment upwards and occurs together with the electrolysis gases in the catholyte space in the upper one Area of the electrolytic plate 4 through holes 13 to the passages 8 and Anolyte space through holes 14 to the passages 7 again.
  • foils 15 and 16 attached, which the diaphragm 6th protect.
  • the foils have a thickness of 0.5 mm and became more unequal in shape
  • Triangles with the dimensions 190 x 290 mm with rounded corners and smooth cut edges to the diaphragm 6 or the membrane in the corners the acid inlet openings in special holes in the frame with rounded, acid-resistant plastic rivets (not shown) attached.
  • One foil triangle each 15 and 16 are provided here before the anolyte entry and catholyte entry (FIG. 3).
  • the gases generated at the anode and cathode ensure sufficient mixing and supplying the anode or cathode with hydrochloric acid.
  • Fig. 4 shows the schematic side view of a variant of the electrolysis plate according to example 1 with horizontally continuous aprons.
  • the built-in aprons which are mainly used for mechanical protection
  • the membranes used were made from a PTFE or PVDF strip of length 1760 mm and width 190 mm. Throughout the film has a width of 60 mm, but both corners end in isosceles triangles, the 220 mm Start from the end and have an outer edge length of 190 mm. All edges are rounded and deburred.
  • the attachment is as described in Example 1 with plastic rivets in the electrolysis frame 4 on the anolyte and catholyte side. (Fig. 4)
  • FIG 5 shows the schematic side view of a further variant of the electrolysis plate according to example 1 with triangular aprons and horizontally and vertically continuous Perforated films in the edge area of the electrolysis plate 4.
  • the frame 4 To protect diaphragm 6 or membrane is here on the frame 4 on both sides one perforated side film 17 each with a thickness of 0.25 mm and a width of 40 mm introduced, the graphite overlapping at least 10 mm from the perforated film shall be.
  • the upper film 18 is made of 100 mm high perforated film, 0.25 mm thick, the lower approx. 60 mm high.
  • the triangular aprons 15 and 16, respectively, the inlet holes 11 and 12 are attached for facing away from anolyte and catholyte acid are also made of perforated film. The film is cut in this way. that no holes were cut are.
  • the perforated foil cover is here both on the anode and on applied to the cathode. (Fig. 5)

Landscapes

  • 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)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
EP00124257A 1999-11-25 2000-11-13 Plaque pour cellule d'électrolyse Withdrawn EP1103636A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19956787 1999-11-25
DE19956787A DE19956787A1 (de) 1999-11-25 1999-11-25 Elektrolyseplatte

Publications (1)

Publication Number Publication Date
EP1103636A1 true EP1103636A1 (fr) 2001-05-30

Family

ID=7930318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00124257A Withdrawn EP1103636A1 (fr) 1999-11-25 2000-11-13 Plaque pour cellule d'électrolyse

Country Status (6)

Country Link
US (1) US6395155B1 (fr)
EP (1) EP1103636A1 (fr)
JP (1) JP2001181881A (fr)
KR (1) KR20010061947A (fr)
DE (1) DE19956787A1 (fr)
PL (1) PL344075A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006127633A3 (fr) * 2005-05-20 2007-01-18 Electrolyzer Corp Systeme de production d'eau electrolysee acide et membrane de protection
EP3819259A1 (fr) 2019-11-06 2021-05-12 Covestro Deutschland AG Procédé de fabrication d'isocyanate et de polyuréthane à durabilité améliorée
EP4039638A1 (fr) 2021-02-03 2022-08-10 Covestro Deutschland AG Procédé de production de monoxyde de carbone comme matière première destinée à la production d'isocyanate d'une empreinte carbone réduite
EP4234491A1 (fr) 2022-02-24 2023-08-30 Covestro Deutschland AG Procédé de gazéification des matériaux de recyclage polymères pour la fourniture à faible émission du monoxyde de carbone utilisable pour la production de phosgène
EP4310224A1 (fr) 2022-07-19 2024-01-24 Covestro Deutschland AG Production durable de composés amino organiques pour la production d'isocyanates organiques
EP4345094A1 (fr) 2022-09-30 2024-04-03 Covestro Deutschland AG Procédé de production de phosgène avec recyclage du dioxyde de carbone issu du recyclage de matière de valeur
WO2024126607A1 (fr) 2022-12-14 2024-06-20 Basf Se Procédé de préparation d'au moins un polyisocyanate à partir de co2
EP4403589A1 (fr) 2023-01-19 2024-07-24 Basf Se Procédé de préparation d'au moins un polyisocyanate à partir de matériau solide
EP4442859A1 (fr) 2023-04-06 2024-10-09 Covestro Deutschland AG Préparation durable de diisocyanate d'hexaméthylène pour la production de polyuréthane
WO2026082777A1 (fr) 2024-10-16 2026-04-23 Topsoe A/S Plaque bipolaire électroformée et cellule électrolytique comprenant une plaque bipolaire électroformée

Families Citing this family (14)

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Publication number Priority date Publication date Assignee Title
US20030221971A1 (en) * 2002-06-04 2003-12-04 Keister Timothy Edward Method for electrolytic production of hypobromite for use as a biocide
US8585999B2 (en) * 2002-06-04 2013-11-19 Prochemtech International, Inc. Method of making flow-through-resin-impregnated monolithic graphite electrode and containerless electrolytic cell comprising same
US7927470B2 (en) * 2002-06-04 2011-04-19 Prochemtech International, Inc. Flow-through-resin-impregnated monolithic graphite electrode and containerless electrolytic cell comprising same
KR100701874B1 (ko) * 2005-03-04 2007-03-30 한국원자력연구소 전해액의 독립적 직렬 흐름 유로를 갖는 셀 적층형 단극식격막 전해장치
WO2008064159A1 (fr) 2006-11-19 2008-05-29 Wood Stone Corporation Unité de production d'hydrogène
CN101814605B (zh) * 2010-03-19 2012-07-25 清华大学 一种含氟树脂的导电塑料双极板制备方法
US9051657B2 (en) 2012-07-16 2015-06-09 Wood Stone Corporation Modular electrolysis unit
DE102014010813B4 (de) * 2014-07-23 2025-11-20 Kanadevia lnova AG Rahmen für eine Elektrolysevorrichtung, Elektrolysezellen-Modul und Elektrolysevorrichtung
DE102014010812A1 (de) * 2014-07-23 2016-01-28 Etogas Gmbh Rahmen für eine Elektrolysevorrichtung, Elektrolysezellen-Modul und Elektrolysevorrichtung
CL2016001108A1 (es) * 2016-05-09 2017-03-10 Pl Copper Spa Revestimiento solido para ánodos de electro obtención el cual posee partes laterales, inferiores y superior frontal para cubrir e impedir la conductividad de los bordes del ánodo y además comprende partes laterales e inferiores accesorias que mantienen un espaciamiento entre los ánodos y cátodos.
KR102882126B1 (ko) 2021-02-15 2025-11-07 섀플러 테크놀로지스 아게 운트 코. 카게 수소 생성을 위한 전해판 및 전해판을 생성하기 위한 방법
DE102022101801A1 (de) 2021-02-15 2022-08-18 Schaeffler Technologies AG & Co. KG Elektrolyseplatte für die Wasserstoffherstellung und Verfahren zur Herstellung einer Elektrolyseplatte
JP7615355B2 (ja) 2021-06-16 2025-01-16 シェフラー テクノロジーズ アー・ゲー ウント コー． カー・ゲー 電気分解設備用電極板
DE102022112593A1 (de) 2021-06-16 2022-12-22 Schaeffler Technologies AG & Co. KG Elektrodenplatte für ein Elektrolysesystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233146A (en) * 1979-03-09 1980-11-11 Allied Chemical Corporation Cell flow distributors
EP0051764A1 (fr) * 1980-11-06 1982-05-19 Bayer Ag Cellule électrolytique destinée à l'électrolyse de l'acide chlorhydrique pour la fabrication de chlore et d'hydrogène
EP0266948A1 (fr) * 1986-11-07 1988-05-11 Imperial Chemical Industries Plc Cellule électrolytique

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD112907A5 (fr) * 1973-04-06 1975-05-12
DE2503215C2 (de) * 1975-01-27 1986-08-07 Keramchemie GmbH, 5433 Siershahn Vorrichtung zur Elektrolyse von Salzsäure
DE2816152C2 (de) * 1978-04-14 1980-07-03 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von Chlor aus Salzsäure durch Elektrolyse und Salzsäure-Elektrolysezelle
DE2908269C2 (de) * 1979-03-02 1984-04-26 Uhde Gmbh, 4600 Dortmund Salzsäure-Elektrolysezelle
IT1283628B1 (it) * 1996-05-07 1998-04-23 De Nora Spa Tipo migliorato di lastra bipolare per elettrolizzatori
US6066248A (en) * 1998-10-27 2000-05-23 E. I. Du Pont De Nemours And Company Process for aqueous HCl electrolysis with thin film electrodes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4233146A (en) * 1979-03-09 1980-11-11 Allied Chemical Corporation Cell flow distributors
EP0051764A1 (fr) * 1980-11-06 1982-05-19 Bayer Ag Cellule électrolytique destinée à l'électrolyse de l'acide chlorhydrique pour la fabrication de chlore et d'hydrogène
EP0266948A1 (fr) * 1986-11-07 1988-05-11 Imperial Chemical Industries Plc Cellule électrolytique

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8858765B2 (en) 2005-05-20 2014-10-14 Ecolab Usa Inc. Acidic electrolyzed water production system and generation control method
WO2006127633A3 (fr) * 2005-05-20 2007-01-18 Electrolyzer Corp Systeme de production d'eau electrolysee acide et membrane de protection
US12291595B2 (en) 2019-11-06 2025-05-06 Covestro Intellectual Property Gmbh & Co. Kg Method for isocyanate and polyurethane production with improved sustainability
EP3819259A1 (fr) 2019-11-06 2021-05-12 Covestro Deutschland AG Procédé de fabrication d'isocyanate et de polyuréthane à durabilité améliorée
WO2021089737A1 (fr) 2019-11-06 2021-05-14 Covestro Intellectual Property Gmbh & Co. Kg Procédé de production d'isocyanate et de polyuréthane présentant une durabilité améliorée
EP4039638A1 (fr) 2021-02-03 2022-08-10 Covestro Deutschland AG Procédé de production de monoxyde de carbone comme matière première destinée à la production d'isocyanate d'une empreinte carbone réduite
WO2022167387A1 (fr) 2021-02-03 2022-08-11 Covestro Deutschland Ag Procédé de production de monoxyde de carbone en tant que matière première pour la production d'isocyanate avec une empreinte carbone réduite
EP4234491A1 (fr) 2022-02-24 2023-08-30 Covestro Deutschland AG Procédé de gazéification des matériaux de recyclage polymères pour la fourniture à faible émission du monoxyde de carbone utilisable pour la production de phosgène
WO2023161302A1 (fr) 2022-02-24 2023-08-31 Covestro Deutschland Ag Procédé de gazéification de matériaux polymères de valeur pour produire avec de faibles émissions du monoxyde de carbone pouvant être utilisé pour la production de phosgène
EP4310224A1 (fr) 2022-07-19 2024-01-24 Covestro Deutschland AG Production durable de composés amino organiques pour la production d'isocyanates organiques
WO2024017890A2 (fr) 2022-07-19 2024-01-25 Covestro Deutschland Ag Production durable de composés aminés organiques pour la production d'isocyanates organiques
EP4345094A1 (fr) 2022-09-30 2024-04-03 Covestro Deutschland AG Procédé de production de phosgène avec recyclage du dioxyde de carbone issu du recyclage de matière de valeur
WO2024068685A1 (fr) 2022-09-30 2024-04-04 Covestro Deutschland Ag Procédé de production de phosgène avec recirculation de dioxyde de carbone issu du recyclage de matières valorisables
WO2024126607A1 (fr) 2022-12-14 2024-06-20 Basf Se Procédé de préparation d'au moins un polyisocyanate à partir de co2
EP4403589A1 (fr) 2023-01-19 2024-07-24 Basf Se Procédé de préparation d'au moins un polyisocyanate à partir de matériau solide
WO2024153745A1 (fr) 2023-01-19 2024-07-25 Basf Se Procédé de préparation d'au moins un polyisocyanate à partir d'un matériau solide w
EP4442859A1 (fr) 2023-04-06 2024-10-09 Covestro Deutschland AG Préparation durable de diisocyanate d'hexaméthylène pour la production de polyuréthane
WO2024208940A2 (fr) 2023-04-06 2024-10-10 Covestro Deutschland Ag Production durable de diisocyanate d'hexaméthylène pour la production de polyuréthane
WO2026082777A1 (fr) 2024-10-16 2026-04-23 Topsoe A/S Plaque bipolaire électroformée et cellule électrolytique comprenant une plaque bipolaire électroformée

Also Published As

Publication number Publication date
US6395155B1 (en) 2002-05-28
JP2001181881A (ja) 2001-07-03
DE19956787A1 (de) 2001-05-31
PL344075A1 (en) 2001-06-04
KR20010061947A (ko) 2001-07-07

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