TW200902767A - Electrode for membrane electrolysis cells - Google Patents

Abstract

The invention relates to an electrode for membrane electrolysis cells comprising a grooved metal support favouring the gas release and the electrolyte renewal on its surface. The grooved geometry of the support may be obtained by erosion of a metal sheet with abrasive media in a continuous process.

Description

200902767 IX. Description of the Invention: [Technical Field] The present invention relates to an electrode for electrochemical applications, and more particularly to an electrode for a diaphragm electrolytic cell used on a metal carrier. [Prior Art] The electrolysis process carried out in an electrolytic cell separated by an ion exchange membrane, the most relevant industrial electrochemical use. Some of these uses are alkalis, which are sputum water electrolysis (chlorine reduction electrolysis), especially sodium chloride water electrolysis, to produce chlorine and caustic soda and tannic acid solution electrolysis. In the following description, sodium chloride electrolysis is referred to as the most representative and representative example of the overall production, but the present invention is not limited to such use. Eight In the diaphragm Wei, the anode chamber of the electrolytic cell is · ion exchange $, separated from the cathode chamber. The anode chamber of the rotary tank is filled with gasified Wei water, for example, concentrated; the gas is released on the surface of the anode, and the current density usually does not exceed k^/m, while the natural consumption of the hydrophobic water to the outlet concentration is often transmitted across the membrane at the application of the 22 ion electric field to The cathode chamber, where the degree of enthalpy is usually not higher than 33% by weight. The caustic product is extracted, and is concentrated in the electrolytic material. In the cathode wire also occurs ^ ΐ: ϊ ίί low iitt will cause the work f design at the higher current density of the operating plant in the 3 operations, while the new cheaper in the 5 design of the current trend is further increased to 6 kW or do, Will be released, the release, the flow rate increases with the current density and the mechanical integrity of the two S ' / _ is potentially dangerous: because = = electricity =:,:,, increase in the second = = release = subsequent acidification, And the combination of the partial release == layer farming = accumulation, milk accumulation, trapped new water, acidification), caused by the diaphragm ^ 5 200902767 ίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίίί Under the condition, the liquid retention leads to the formation of the caustic formation table = the two-pole interface promotes the hydrophobic circulation, so as to avoid the riding of the pole surface due to the elimination of the interface, so as to improve the supply of the hydrophobic water to the anode. Exchange ===;: Some ==: Anti-Ion 7 has the best function, with the current market === system, ϊίί:: ί=ϊ,f electrode used to overcome the limitations of the prior art f, this (10) It is possible to use electricity X. [Invention] Various aspects of the invention are listed in the scope of the accompanying claims. The groove obtained on the base of the gold η genus has a plurality of partial parallel to 〇.5 two brewing 'distance between adjacent grooves (pitch) 〇.〇1 200902767 Partial parallel groove means plural open or sealed with straight line two The path of the trench can be assumed to be (4) 电 电 structure 'curvature in a straight line or any shape. In - and = pay again. 'Electric c surface presents a local parallel groove, there is a seal _ shape, each other = the defined electrode is beneficial for any electrolysis application, the ion father for direct contact; for the ship spleen, = when working and with a grooved surface Combination, direct contact with the electrode

And do not record steel. The base body can be of any geometric shape: as the mouth of the mouth J, the surface of the groove can be set on the sheet of the punch or the die, and the structure of the structure is rotated, also known as the louver electrode. · Designed for the Wei electrolysis cell _ to do the anode to reduce the gas when it is released 3 especially for the chlorine reduction electrolytic cell 'no matter the cathode used for the release of chlorine, especially when combined with the grooved wire = the parallel extension of the cross-age knot In the concave state, the concave tiff t has an improved cycle of bubbles released from the surface. According to the second inventor's view, on the surface of the groove, the electrolytic cell voltage is fully acceptable. On-site testing, at = 3 degrees below 2 GG g / l (especially down to 15 )) can achieve superior fruit / product concentration above 33% (especially 37%), the difference in dimensional is higher than 3000 When Pa (especially up to 1 〇〇〇〇pa) force, these conditions usually cause the diaphragm to deteriorate rapidly. Do not recognize, the electrode is not willing to be limited by any special theory, it can be assumed that the electrode obtained on the surface of the groove above 200902767 can release the bubble particularly efficiently, and compared with the groove electrode, it may be a dense filling phenomenon. Contrary to the electrolyte cycle.胄 胄 胄 胄 ii ii ii ii ii ii ii ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ΪΓ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ;丨1. 曲张ί1 Γ1 thick, 600 mm x 800 mm wide titanium grade 1 sheet, job ^ deep tii grinding wheel to invade the surname, all the swatches have a spacing 〇.2 mesh geometry open: ditch , sheet f according to the known technology to pull 'de flat diamond 俨 shovel skin 2 2 diagonal 1 〇 mmx 5 « «11, moving step 1.5111111. Pulling a 1 Γ Γ Γ ’ ’ ’ 以 以 以 以 以 以 以 以 以 以 以 以 以 以 以 以

Sheet, = rational, two sheets 1 mm thick, and 600 mm X 800 mm wide nickel is degreased, treated with the same erosion, then pulled, and the consistent geometry 200902767 ίίί 丝 面 咖 咖 咖 咖 平均 平均Diameter ΓΜ groove depth (mm) U 1 0.002 — {JZ 0.01 0.05 Γ0_, bucket back sample), marked as AO and column, respectively, according to the way ' 'with diamond blasting' later The residual polishing of HC1 is _ strutting treatment; however, there is no additional ί extreme release and titanium oxide based catalyst, which will cause any significant variation in the coating process. Dedicated to the gutter ice, not seen f 丨 2 5 5 = =1 = ' sliced into 15 ° one. 〇 Γ ίίί Γ Π 细 各 各 各 各 — — — — — — — — — — — 隔 隔 隔 隔 隔 隔 隔 隔 隔 隔 隔 隔 ° ° Table ff= Test 'Enable all electrolytic cells, anode and human 仃 = use the measurable normal workmanship, the mouth, the process conditions are far away from the process electric if sono ion exchange diaphragm decay time, to the neck door ί Ϊ The initial value of 4 degrees says that the electrolytic cell voltage is increased by the G5 V thunder time meter. The process conditions are as follows: .V - the concentration of hydrophobic water at the outlet of the anode chamber: 150g / 1 concentration of caustic soda, weight: 37% - pressure difference across the two chambers: 5000Pa electric suspension degree · 12 kA / n ^ The results are shown in Table 3. ·· 9 200902767 Table 3

Test number Anode Cathode Duration (h) 1 AO CO 514 2 AO CO 562 3 AO C2 580 4 A0 C3 565 5 A1 CO 729 6 A2 CO 904 7 A3 CO 1213 8 A4 CO 1417 9 A5 CO 866 10 A6 CO 578 11 A2 C1 940 12 A3 C1 1283 13 A4 C1 1646 14 A5 C1 1108 15 A1 C2 887 16 A2 C2 959 17 A3 C2 1682 18 A4 C2 1704 19 A5 C2 1011 20 A6 C2 622 21 A3 C3 1088 22 A4 C3 1544 23 A3 C1 1305 24 A4 C1 1593 Example 3 An electrolytic cell is the same as in Embodiment 2, and an anode sample A4 and a cathode sample C2 are installed. The second similar electrolytic cell is provided with a groove-free anode sample A0 and a groove-free cathode sample C0, in the process conditions. Life test, which is stricter than the normal industrial situation. The process conditions are set as follows: - the concentration of hydrophobic water at the outlet of the anode chamber: 180 g / 1 concentration of caustic soda, weight: 35%: pressure difference across two chambers: 4000 Pa, current density: 10 kA / m2 200902767 = After about 900 hours, the electrode samples A〇 and c〇ί'ίΐί were installed. The gradual deterioration of the St diaphragm caused the voltage of the electrolytic cell to rise sharply. The two layers of the cathode were also observed, and the electrolytic cell of the cathode (C) cathode C2 was also observed. In fact, certain voltages will depend on the time. When electrolysis is transferred, it does not depend on the deterioration of the diaphragm. f The above description cannot be closed. The ship is different and has no scope, but the scope of the attached patent application shall prevail. ,] In the full text of this case and in the Patent Model II, "including" and similar terms, without the exclusion of the existence of other components or additives. The literature discussion, role, materials, agricultural, and papers contained in this manual are purely to provide the context of the present invention, and are not suggested or indicated as either: or part of the prior art basis or the priority of each patent application in this case. Previously, general knowledge has been gained in the field related to the present invention.

Claims (1)

200902767 X. Patent application garden: . 〇, mm in the electrode of _5 to Γ.02:^^, where the depth of the groove, the surface-like electrode of the first or second electrode, wherein the concave The channel is along the electrode of the first or second term of the full-groove system, wherein the partially parallel concave self-packaging electrode, wherein the material of the substrate is selected from the group of alloys and unique solutions. Materials selected from the group consisting of stamped or (10) mesh, louver and louver s structures. 7. The electrode 如 according to the scope of claim 胄i is applied to the surface having the groove. Among them, the electrode of the catalytic coating is reduced by 7 patents, wherein the catalytic coating includes precious metals or oxides thereof. I have a type of electrolytic cell that includes at least the ion exchange membrane direct contact of the patent application. 〃 10. The electrolytic cell of claim 9, wherein the at least one electrode = the parallel groove along the entire surface oriented in a substantially vertical direction is also suitable. The method of any of the first to eighth embodiments, comprising the step of forming the plurality of grooves on the metal substrate by using a continuous punch. 12. The method of claim 11, wherein the erosion is utilized At least one device selected from the group consisting of a paper or cloth roller, a grindstone and a sheet grinding wheel, continuously. 12 200902767 13. A drawing machine or a miller as claimed in claim U. The method, wherein the erosion system Using 14. Electrolytic side of a reduced gas rehydration, with direct current, including the steps, in the Φ $ 'money membrane electrolytic cell - the electric record transfer to the secret person / specialize her _ μ item 15. The method of applying the patent item range item μ, the gas released by the anode, or the hydrogen released by the cathode. The method of shuffling the body system r === the 14th or 15th method, wherein the DC power Difference mit. 14 methods, across the paste pool In the case of the inside, the material is in the anode chamber 13 200902767 VII. Designation of the representative figure: (1) The representative figure of the case is: No. (2) The symbol of the symbol of the representative figure is simple: 8. If there is a chemical formula in this case, please Reveal the chemical formula that best shows the characteristics of the invention: 200902767 Household 7 Ref. Monthly Repair, ·. Method of drawing 1 machine or heart circumference item 11, wherein the money is made by using one of the electrodes in the direct solution pool. The gas generating product patent _ Μ 任 任 · · · 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放 释放Or a density of 15 of at least 5 kA/m2. The method of the shell, wherein the direct current 17. The method of claim 14 is less than 3,000 Pa. ^ The pressure of the electrolytic cell 18. If the patent application is the 14th item The method wherein the concentration is at most 2 GGg/l. The method of claim 14 is as described in claim 14, wherein the alkaline solution having a concentration of at least 3 is used in the cathode chamber. .-The electrode used in the diaphragm electrolytic cell, By reference to the examples and figures on the embodiments. 13