WO2001004383A1 - Procede d'electrolyse de chlorure alcalin - Google Patents
Procede d'electrolyse de chlorure alcalin Download PDFInfo
- Publication number
- WO2001004383A1 WO2001004383A1 PCT/JP2000/004520 JP0004520W WO0104383A1 WO 2001004383 A1 WO2001004383 A1 WO 2001004383A1 JP 0004520 W JP0004520 W JP 0004520W WO 0104383 A1 WO0104383 A1 WO 0104383A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- oxygen
- chamber
- cathode
- containing gas
- Prior art date
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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
- 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
- C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm 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
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
Definitions
- the present invention relates to an ion exchange membrane electrolysis method using a gas diffusion cathode, and more particularly to an oxygen electrolysis method using an ion exchange membrane electrolysis method.
- the present invention relates to a method for supplying a gas and an aqueous solution of water or a hydroxide.
- a cation exchange membrane generally comprises an anode chamber having an anode and containing an aqueous alkali chloride solution and a cathode chamber having a cathode and containing water or an aqueous caustic solution.
- Patent documents disclosing this production method include, for example, JP-A-54-97600, JP-A-56-474784, and JP-A-56-134804. No., JP-A-57-154, 1979, JP-A-59-133, 386, JP-A-61, 266, 91, Japanese Patent Publication No. 58-44 No. 1 56, No. 58-49 6 39, No. 60-95, 95, No. 6 1-206, etc. Is mentioned.
- an anode chamber having an anode and a cathode chamber having a cathode are separated by an ion-exchange membrane.
- An aqueous solution is supplied to generate chlorine gas at the anode, caustic or water is supplied to the cathode chamber, and caustic and hydrogen gas are generated at the cathode.
- an anode chamber having an anode and a cathode chamber having a gas diffusion cathode are separated by an ion exchange membrane, and the anode chamber is Aqueous chloride solution is supplied, chlorine gas is generated at the anode, caustic alkali or water is supplied to the cathode chamber, oxygen-containing gas is supplied to the gas chamber of the gas diffusion cathode, and caustic Generate.
- a typical example is a gas diffusion cathode formed from a mixture of carbon powder and polytetrafluoroethylene powder by a hot press or the like. It is a gas-permeable sheet with holes, and supports a noble metal such as platinum or silver or their alloys as a catalyst, and is reinforced with a metal mesh to increase strength and conductivity Sometimes.
- This gas diffusion cathode usually has a gas chamber on the back side of the electrode surface, and when an oxygen-containing gas is supplied to the gas chamber and a reaction described below occurs, hydrogen gas is not generated on the electrode surface. Nana I'm wearing
- the cost of the raw material gas is low, but the oxygen concentration is low, so the oxygen reduction performance of the gas diffusion electrode is poor. Pure oxygen costs a great deal even though the performance of the gas diffusion electrode is sufficient.
- the PSA device separates air by the adsorption method.Even though pure oxygen cannot be obtained, the oxygen-containing gas with an oxygen concentration of 90% or more can be obtained at low cost and can be used effectively in this method. It is. However, even if the oxygen-containing gas from the PSA device is used, the operating cost of the gas diffusion cathode greatly changes depending on how much excess oxygen-containing gas is newly supplied.
- the structure of a normal alkaline chloride electrolytic cell having a gas diffusion cathode is usually of a filter press type, and an anode chamber having an anode, an ion exchange membrane, a cathode chamber, and a gas diffusion cathode (With gas chamber)
- the unit composed in the order of is stacked in plural.
- a single flow control system is used for each electrolytic cell, and a simple system such as an orifice is generally used to distribute and supply the gas uniformly to each gas chamber.
- Alkaline chloride electrolytic cells using gas diffusion cathodes are usually of the three-chamber method.
- the three-chamber method electrolyzer is called the three-chamber method because it is divided into an anode chamber, a catholyte chamber, and a gas chamber by an ion exchange membrane and a liquid-impermeable gas diffusion cathode.
- the unit consists of an anode chamber having an anode, an ion exchange membrane, a gas diffusion cathode, and a gas chamber also serving as a cathode chamber.
- the number of chambers is divided into two chambers by the ion exchange membrane: an anode chamber and a gas chamber that also serves as a cathode chamber.
- the gas diffusion cathode is liquid-permeable, so that alkali metal ions that have permeated the cation exchange membrane do not collect between the ion exchange membrane and the gas diffusion cathode. Since the gas diffusion cathode is not substantially formed, the gas diffusion cathode can be in close contact with the ion exchange membrane, and the distance between the electrodes can be shortened.However, if there is no electrolyte solution, the electric resistance increases, so that ion exchange is performed. A highly water-containing spacer or the like is placed between the membrane and the gas diffusion cathode, and it is possible to continue electrolysis by holding the caustic aqueous solution.
- the gas chamber that also serves as the cathode chamber behind the gas diffusion cathode contains oxygen.
- a gas is supplied.
- Oxygen gas diffuses through the gas diffusion cathode, which has excellent gas permeability, and produces caustic at the reaction point.
- the generated aqueous caustic solution drops in the spacer, is drawn out to the back of the cathode through the hole, and is discharged out of the electrolytic cell together with the excess oxygen-containing gas.
- the present invention relates to an electrolysis method for producing chlorine and caustic aluminum chloride in an alkaline chloride electrolytic cell equipped with a gas diffusion cathode, and producing chlorine and caustic aluminum chloride. The purpose is to reduce the rate and to easily control the temperature of the electrolytic cell.
- the inventors of the present invention have proposed a method for electrolyzing an aqueous solution of aluminum chloride in an aluminum chloride electrolytic cell having a gas diffusion cathode to produce chlorine and caustic aluminum, and to reduce the operating cost while maintaining the performance.
- To reduce the amount of newly supplied oxygen-containing gas supply that is, to reduce the excess oxygen ratio of newly supplied oxygen-containing gas from outside and to easily control the temperature of the electrolytic cell
- the present invention has been completed. I came to.
- Brine is introduced into the anode chamber of an ion exchange membrane electrolysis cell equipped with a gas diffusion cathode, oxygen-containing gas is introduced into the gas chamber of the gas diffusion cathode, and chlorine is introduced into the anode chamber and into the cathode chamber.
- Fig. 2 shows an example of a normal three-chamber method of an ion exchange membrane method electrolytic cell using a gas diffusion cathode.
- an anode chamber 2 is the same as a usual ion exchange membrane electrolytic cell.
- An aqueous alkali chloride solution is supplied from a supply port 4 and electrolysis is performed at a gas liquid permeable anode 3.
- the anode 3 allows the chlorine gas generated on the anode surface to escape to the back surface so that the distance between the anode 3 and the ion exchange membrane can be reduced.
- a gas-permeable anode in the form of a perforated plate or wire mesh is used. The generated chlorine gas and the dilute aqueous solution of aluminum chloride are discharged from the outlet 5.
- the alkali metal ions generated at the anode 3 pass through the ion exchange membrane 6 and move to the cathode chamber 7 (in the case of the three-chamber method, to distinguish it from the gas chamber which also functions as the two-chamber method, This cathode chamber is sometimes called "caustic chamber".)
- a caustic aqueous solution or water is supplied from the supply port 8, and is electrolyzed by the gas diffusion cathode 10 according to the above formula.
- the generated hydroxyl ions react with metal ions moving through the ion exchange membrane 6 to form caustic ions, and the concentrated aqueous solution of caustic ions is discharged from the outlet 9. .
- a gas chamber 11 is located on the opposite side of the gas diffusion cathode 10 from the cathode chamber 7, and the oxygen-containing gas is supplied to the gas chamber 13 from the gas supply port 13 and discharged from the discharge port 12.
- cathode chamber 7 In the case of the three-chamber method, there are a cathode chamber 7 and a gas chamber 11 on the cathode side of the ion-exchange membrane 6, and the cathode chamber 7 is called a "caustic chamber".
- the present invention relates to an oxygen-containing gas to be supplied to the gas chamber. Therefore, the term “cathode chamber” is used here to refer to the chamber containing the original cathode solution. Is called “cathode chamber”.
- the cathode chamber 7 is supplied with an aqueous caustic solution or water, and the gas chamber 11 is supplied with an oxygen-containing gas.
- FIG. 3 shows an example of a two-chamber method using an ion exchange membrane electrolytic cell using a gas diffusion cathode.
- the portion from the ion exchange membrane to the anode compartment is the same as that shown in FIG.
- the gas diffusion cathode 29 is disposed in contact with the cation exchange membrane 26, and the cathode chamber 32 is also used as a gas chamber, and the water supplied from the gas + water supply port 28 is caustic Used for re-concentration adjustment.
- the cathode chamber 32 is also used as a gas chamber, both water or an aqueous caustic solution and an oxygen-containing gas are supplied.
- the method of the present invention can be applied to any of the methods.
- FIG. 1 shows an example of the process system of the present invention.
- the electrolytic cell 34 is a two-chamber electrolytic cell in which a plurality of anode chambers 31 each having an anode, an ion exchange membrane 33, and a cathode chamber 32 also serving as a gas chamber having a gas diffusion cathode are arranged.
- An alkali chloride aqueous solution is supplied to the anode chamber 31, and the oxygen-containing gas and water from the PSA device 30 are supplied to the cathode chamber 32 which also serves as a gas chamber.
- the aqueous caustic solution and the exhausted oxygen-containing gas discharged from the cathode chamber 32 also serving as a gas chamber are separated by the gas-liquid separator 35, and a part of the exhausted oxygen-containing gas also serves as the gas chamber.
- the cathode chamber 32 is circulated.
- the cathode chamber 32 By circulating a part of the exhausted oxygen-containing gas in this way, even if the oxygen content of the oxygen-containing gas newly supplied from the PSA device 30 has a small excess rate, the cathode chamber 32 also serves as a gas chamber.
- the excess rate of oxygen in the reactor will be kept high.
- the excess amount of oxygen (excess ratio) of the newly supplied oxygen-containing gas as well as the excess amount of oxygen (excess ratio) with respect to the theoretical oxygen requirement becomes a problem. It can be kept low.
- the oxygen-containing gas with an oxygen concentration of 80% is sent from the PSA device 30 to 100 liter (per unit time, the same applies hereinafter) gas chamber, and the oxygen consumption of the gas diffusion electrode is assumed to be 60 liters
- the oxygen supply amount to the gas diffusion electrode was 80 liters, and the excess rate of the oxygen supply amount of the new oxygen-containing gas was about 33%.
- the amount is 40 liters (breakdown: 20 liters of remaining oxygen consumed, 20 liters of inert gas such as nitrogen).
- a part of the exhausted oxygen-containing gas is circulated to the gas chamber, If the amount of oxygen from the circulating exhausted oxygen-containing gas is 14 liters, the amount of oxygen supplied to the gas diffusion electrode will be 8 even if the amount of oxygen from the new oxygen-containing gas is reduced to 66 liters. 0 liters can be maintained, and in this case, the oxygen concentration of the new oxygen-containing gas is 80%, so the supply amount of the new oxygen-containing gas is 82.5 liters.
- the excess ratio of oxygen-containing gas with respect to oxygen is 10% (however, in this case, the oxygen concentration in the mixed gas of the new oxygen-containing gas and the circulating exhausted oxygen-containing gas drops below 80%, It is assumed that the oxygen consumption of the gas diffusion electrode is maintained at 60 liters).
- the supply ratio of the new oxygen-containing gas is reduced by 17.5% by reducing the excess ratio of the new oxygen-containing gas with respect to oxygen from about 33% to 10%. No significant effect on reduction o
- Increasing the circulating amount of the exhausted oxygen-containing gas is advantageous in terms of cost reduction, but in that case, the oxygen concentration of the mixed oxygen gas from the new oxygen-containing gas and the exhausted oxygen-containing gas entering the gas chamber decreases.
- the performance of the gas diffusion electrode is accordingly reduced, there is a practical limit to the size of the circulation amount of the exhausted oxygen-containing gas.
- the amount of air blow increases due to the circulation of the oxygen-containing gas, it is necessary to consider the cost increase.
- the oxygen amount of the exhausted oxygen-containing gas circulated and supplied to the gas chamber is preferably 10% or more and less than 300% of the theoretically required oxygen amount, but the above conditions are also taken into consideration.
- the oxygen-excess ratio of the oxygen-containing gas had to be in the range of 30 to 50%.
- the oxygen excess ratio of the newly supplied oxygen-containing gas can be reduced to 10 to 30%.
- a ripening exchanger 37 is installed in the oxygen gas supply line, and the temperature of the electrolytic cell is controlled by heating or cooling. Usually, when the electrolysis current is low, heating is required, and when the electrolysis current is high, cooling is required. Exhausted oxygen-containing gas Since the gas is circulated and supplied, the amount of oxygen-containing gas supplied to the electrolytic cell is maintained at a large level, thereby facilitating heating or heat removal (cooling) for controlling the temperature of the electrolytic cell. .
- FIG. 1 is a flow diagram of a process system of an electrolysis method of aluminum chloride according to the present invention
- FIG. 2 is a schematic view of a three-chamber ion exchange membrane electrolytic cell having a gas diffusion cathode.
- FIG. 3 is a schematic view of a two-chamber ion exchange membrane electrolytic cell having a gas diffusion cathode.
- An anode compartment having an anode, a cathode compartment having a gas diffusion cathode, and a gas compartment was carried out under the following conditions in a monopolar electrolytic cell composed of two each (an improved version of the DCM102 electrolytic cell manufactured by Chlorine Engineers).
- Electrode area 75.6 dm 2 (width 6 2 cm X 1 2 2 cm) x 2
- Current density 30 A / dm 2
- Anode titanium as base material, Ru0 2 / T i 0 2 electrodes Koti packaging quality ones mainly containing, DS E (registered trademark), Perume Re' click electrode Inc.
- Ion exchange membrane Asahi Kasei Corporation F 4 2 0 3
- Gas diffusion cathode Hydrophobic carbon black (Acetylene black, manufactured by Denki Kagaku Kogyo Co., Ltd.) 60%? Gas diffusion layer consisting of 40% (D-1 manufactured by Daikin Industries, Ltd.), a reaction consisting of 20 parts of hydrophilic carbon black (AB-12, manufactured by Denki Kagaku Kogyo) and 10 parts of PTFE layer, and silver is a 3 m gZ cm 2 charge of lifting as a catalyst integrally molded gas-diffusion cathode by hot Topuresu silver mesh as a current collector.
- Aqueous sodium chloride solution in the anode chamber 200 g / liter
- the supply rate of oxygen-containing gas (93% oxygen concentration) from the PSA unit is 1.
- a 3 m 3 Zh r, excess of oxygen was 1-9% (oxygen excess ratio of oxygen excess is novel oxygen-containing gas).
- oxygen excess ratio of oxygen excess is novel oxygen-containing gas.
- the calculated oxygen excess in each gas chamber was 28% and 10%, respectively (this is the excess of the supplied oxygen to the theoretical oxygen requirement).
- the electrolysis voltage at that time was 2.24 V o
- the supply of oxygen-containing gas from PSA is as it is 1. 3 m 3 / hr, was fed skip back to the supply line of 0. 1 5 m 3 / hr from the exhaust oxygen-containing gas, the two gas chambers
- the oxygen concentration in the exhaust gas was 72% on one side and 62% on the other side.
- the calculated excess of oxygen in each gas chamber, calculated from this, increased to 37% and 21% (this is the excess of supplied oxygen to the theoretical oxygen requirement).
- the electrolytic voltage at this time was 2.23 V.
- a gas chamber of a gas diffusion cathode is provided in an alkaline chloride electrolytic cell provided with a gas diffusion cathode even if the excess rate of the supply amount of new oxygen-containing gas from the outside is reduced.
- the oxygen excess in the reactor can be kept high, thereby reducing the supply of new oxygen-containing gas and significantly reducing the cost of electrolysis.
- the temperature of the electrolytic cell can be easily controlled.
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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)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001509577A JP3421021B2 (ja) | 1999-07-09 | 2000-07-06 | 塩化アルカリの電解方法 |
US09/786,711 US6488833B1 (en) | 1999-07-09 | 2000-07-06 | Method for electrolysis of alkali chloride |
EP00944311.0A EP1120481B1 (en) | 1999-07-09 | 2000-07-06 | Method for electrolysis of alkali chloride |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/196287 | 1999-07-09 | ||
JP19628799 | 1999-07-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001004383A1 true WO2001004383A1 (fr) | 2001-01-18 |
Family
ID=16355303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/004520 WO2001004383A1 (fr) | 1999-07-09 | 2000-07-06 | Procede d'electrolyse de chlorure alcalin |
Country Status (5)
Country | Link |
---|---|
US (1) | US6488833B1 (ja) |
EP (1) | EP1120481B1 (ja) |
JP (1) | JP3421021B2 (ja) |
CN (1) | CN1161496C (ja) |
WO (1) | WO2001004383A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007505214A (ja) * | 2003-09-12 | 2007-03-08 | バイエル マテリアルサイエンス アーゲー | 塩化水素またはアルカリ金属塩化物の水溶液の電解方法 |
JP2008106038A (ja) * | 2006-09-02 | 2008-05-08 | Bayer Materialscience Ag | ジアリールカーボネートの製造方法およびそれらから生じるアルカリ塩化物溶液の処理方法 |
JP2012528931A (ja) * | 2009-05-30 | 2012-11-15 | メッサー グループ ゲーエムベーハー | 電解槽における塩化水素またはアルカリ塩化物の水溶液の電解のための方法および装置 |
WO2017221505A1 (ja) * | 2016-06-24 | 2017-12-28 | 東亞合成株式会社 | 水酸化アルカリ製造装置及び水酸化アルカリ製造装置の運転方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10159708A1 (de) * | 2001-12-05 | 2003-06-18 | Bayer Ag | Alkalichlorid-Elektrolysezelle mit Gasdiffusionselektroden |
JP3924545B2 (ja) * | 2003-03-31 | 2007-06-06 | 三井化学株式会社 | ガス拡散電極の排電方法 |
DE102011005133A1 (de) * | 2011-03-04 | 2012-09-06 | Bayer Materialscience Aktiengesellschaft | Verfahren zum Betrieb einer Sauerstoffverzehrelektrode |
ITMI20121736A1 (it) * | 2012-10-16 | 2014-04-17 | Industrie De Nora Spa | Cella di elettrolisi di soluzioni alcaline |
TW201504477A (zh) * | 2013-07-17 | 2015-02-01 | Industrie De Nora Spa | 電解電池和鹼溶液電解槽以及在電池內之電解方法 |
CN104032127B (zh) * | 2014-06-10 | 2016-07-06 | 中南大学 | 一种矿浆电解法从镍钼矿中浸出钼的工艺 |
CN108796544B (zh) * | 2018-05-04 | 2021-04-09 | 四川大学 | 一种电化学制备氢氧化镁联产碳酸镁的装置及其方法 |
DE102020002642A1 (de) | 2020-05-02 | 2021-11-04 | Math Lemouré | Verfahren zur Entsalzung von Meerwasser |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5589486A (en) * | 1978-12-28 | 1980-07-07 | Toyo Soda Mfg Co Ltd | Electrolysis of alkali chloride aqueous solution |
JPH01234585A (ja) * | 1988-03-11 | 1989-09-19 | Choichi Furuya | ガス拡散電極を用いる電解方法及び装置 |
JPH10110287A (ja) * | 1996-10-04 | 1998-04-28 | Choichi Furuya | ガスリフトポンプ部を有するガス拡散電極 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE415039B (sv) * | 1978-03-02 | 1980-09-01 | Lindstroem Ab Olle | Elektrolysor for elektrolys av saltlosningar |
US4187350A (en) * | 1978-09-05 | 1980-02-05 | The Dow Chemical Company | Porous catalyzed electrode provision and technique |
US4312720A (en) * | 1978-09-05 | 1982-01-26 | The Dow Chemical Co. | Electrolytic cell and process for electrolytic oxidation |
US4221644A (en) * | 1979-08-14 | 1980-09-09 | Diamond Shamrock Corporation | Air-depolarized chlor-alkali cell operation methods |
US4486276A (en) * | 1981-02-06 | 1984-12-04 | Engelhard Corporation | Method for suppressing hydrogen formation in an electrolytic cell |
US4969981A (en) * | 1988-09-19 | 1990-11-13 | H-D Tech Incorporated | Cell and method of operating a liquid-gas electrochemical cell |
-
2000
- 2000-07-06 JP JP2001509577A patent/JP3421021B2/ja not_active Expired - Lifetime
- 2000-07-06 EP EP00944311.0A patent/EP1120481B1/en not_active Expired - Lifetime
- 2000-07-06 CN CNB008012571A patent/CN1161496C/zh not_active Expired - Lifetime
- 2000-07-06 WO PCT/JP2000/004520 patent/WO2001004383A1/ja active Application Filing
- 2000-07-06 US US09/786,711 patent/US6488833B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5589486A (en) * | 1978-12-28 | 1980-07-07 | Toyo Soda Mfg Co Ltd | Electrolysis of alkali chloride aqueous solution |
JPH01234585A (ja) * | 1988-03-11 | 1989-09-19 | Choichi Furuya | ガス拡散電極を用いる電解方法及び装置 |
JPH10110287A (ja) * | 1996-10-04 | 1998-04-28 | Choichi Furuya | ガスリフトポンプ部を有するガス拡散電極 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007505214A (ja) * | 2003-09-12 | 2007-03-08 | バイエル マテリアルサイエンス アーゲー | 塩化水素またはアルカリ金属塩化物の水溶液の電解方法 |
JP2008106038A (ja) * | 2006-09-02 | 2008-05-08 | Bayer Materialscience Ag | ジアリールカーボネートの製造方法およびそれらから生じるアルカリ塩化物溶液の処理方法 |
JP2012528931A (ja) * | 2009-05-30 | 2012-11-15 | メッサー グループ ゲーエムベーハー | 電解槽における塩化水素またはアルカリ塩化物の水溶液の電解のための方法および装置 |
WO2017221505A1 (ja) * | 2016-06-24 | 2017-12-28 | 東亞合成株式会社 | 水酸化アルカリ製造装置及び水酸化アルカリ製造装置の運転方法 |
JP2017226899A (ja) * | 2016-06-24 | 2017-12-28 | 東亞合成株式会社 | 水酸化アルカリ製造装置及び水酸化アルカリ製造装置の運転方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1316022A (zh) | 2001-10-03 |
JP3421021B2 (ja) | 2003-06-30 |
EP1120481B1 (en) | 2016-03-09 |
EP1120481A4 (en) | 2005-12-21 |
US6488833B1 (en) | 2002-12-03 |
EP1120481A1 (en) | 2001-08-01 |
CN1161496C (zh) | 2004-08-11 |
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