CN1020765C - Graphite anode for chlor-alkali industry and manufacturing method thereof - Google Patents
Graphite anode for chlor-alkali industry and manufacturing method thereof Download PDFInfo
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- CN1020765C CN1020765C CN 90107230 CN90107230A CN1020765C CN 1020765 C CN1020765 C CN 1020765C CN 90107230 CN90107230 CN 90107230 CN 90107230 A CN90107230 A CN 90107230A CN 1020765 C CN1020765 C CN 1020765C
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000010439 graphite Substances 0.000 title claims abstract description 110
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 110
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000003513 alkali Substances 0.000 title abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 26
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000460 chlorine Substances 0.000 claims abstract description 23
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 23
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 20
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 20
- 229920002635 polyurethane Polymers 0.000 claims abstract description 15
- 239000004814 polyurethane Substances 0.000 claims abstract description 15
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 33
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229920000223 polyglycerol Polymers 0.000 claims description 2
- 229920001451 polypropylene glycol Polymers 0.000 claims description 2
- 229910021645 metal ion Inorganic materials 0.000 claims 1
- 238000005868 electrolysis reaction Methods 0.000 abstract description 29
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 4
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000010405 anode material Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000006837 decompression Effects 0.000 description 3
- 239000007770 graphite material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229940011182 cobalt acetate Drugs 0.000 description 1
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- -1 oleum lini Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002383 tung oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
A graphite anode for electrolysis in chlor-alkali industry and its production method are that the surface of graphite body is covered with metal oxide and polyurethane, or the metal oxide is mixed into polyurethane, and the graphite body is directly impregnated. Then the polyurethane is solidified under normal temperature and pressure to obtain the graphite anode product with long service life and low power consumption. Compared with the common graphite anode, the service life of the graphite anode obtained by the method can be prolonged to 1.2-3.5 times, the chlorine overpotential is reduced by 0.1-0.3V, the electric energy is obviously saved, and the electrode can be used for high-temperature (nearly 100 ℃) electrolysis.
Description
The present invention relates to a kind of anode and manufacture method thereof, particularly a kind of graphite anode and manufacture method thereof that is used for chlorine industry.
Graphite is a kind of inexpensive, use range anode material widely in electrolytic industry, especially in chlorine industry, in a large number as the anode of sodium chloride electrolysis.But graphite as the shortcoming that anode exists is, graphite is porous material, and is easily oxidized in electrolytic process, and corroded, and makes that its wastage rate in electrolytic process are big, the life-span short, generally about 6～7 months of the graphite anode life-span of using in chlor-alkali production; On the other hand, graphite anode chlorine overpotential height causes the power consumption height, and general chlor-alkali plant power consumption accounts for 50% of cost.Therefore people are being devoted to prolong the life-span of graphite anode always, and expectation reduction overpotential, reduce power consumption, and perhaps when the life-span prolonged, overpotential is not obvious to be increased, thus the not obvious increase of power consumption.In order to prolong the life-span of graphite anode, once there was patent SU511289 that siccative oil such as oleum lini, tung oil and polyester etc. are immersed in the graphite hole, to reach the electrolytic corrosion that slows down graphite, the purpose that increases the service life in the past.But because siccative oil solidifies difficulty and corrosion-resistant in graphite pores; Thermosetting polyester class curing process complexity, with the graphite material poor adhesion, the DeGrain of prolongs life.The solution impregnation graphite of clear 57-48508 of Japanese Patent and United States Patent (USP) 4255466 usefulness urethane, decompression adds the heat extraction partial solvent then, removes the urethane resin on surface again, uses high temperature (50～200 ℃), pressurization 0.5～20kg/cm at last in pressurizing vessel
2Solidify.The solvent of preparation polyurethane solution is a ketone, as acetone, methyl ethyl ketone, mibk etc. and dimethyl formamide.This measure successfully make graphite anode life-span when 50 ℃ of electrolysis of handling extend to 1.1～1.7 times (with common graphite anode life be 1, then ratio reaches 1.1～1.7 the life-span).But still there are following defective in this method and goods thereof:
(1) the chlorine overpotential is than common graphite anode height (high approximately 50 millivolts), and this will increase the consumption of electricity in chloric alkali electrolysis.
(2) urethane that immerses in the graphite material is realized solidifying under high temperature (50～200 ℃) pressurization (pressurization is in order to prevent that the polyurethane solution that immerses in the graphite hole from flowing out) condition, require to use pressure-resistant equipment, its curing process and equipment complexity are brought certain difficulty to industrial production.Owing to comprise organic solvents such as ketone in the soaker, also make high-temperature pressurizing technology have unsafe factor.
(3) urethane after impregnated graphite solidifies, when being used for high-temperature electrolysis (nearly 100 ℃) process, poor heat stability, so that in the high-temperature electrolysis process (in for example general sodium-chlor membrane electrolysis), fail to reach satisfied treatment effect.
The purpose of this invention is to provide a kind of improved graphite anode of chlorine industry and manufacture method thereof of being used for.This anode can not only prolong the life-span of graphite anode, and can reduce the chlorine overpotential, and its preparation method is also simple.
Electrode of the present invention is topped metal oxide and the urethane that electro catalytic activity is arranged in graphite body surface.Their ratio is a graphite: metal oxide: preferably 100: 0.4～1.5: 2～5(weight ratio urethane=100: 0.3～5: 0.8～20(weight ratio)).Metal oxide can increase the reactive behavior of graphite anode, improves speed of reaction, reduces the chlorine overpotential, has reduced the consumption of anode material simultaneously.Urethane can increase the graphite anode life-span and make the metal oxide adhere firmly.Therefore, electrode of the present invention has long, advantage such as power consumption is low of life-span.Metal oxide will have electro catalytic activity and characteristics such as water insoluble, as the oxide compound Co of cobalt
3O
4, the oxide compound of iron such as Fe
3O
4, Fe
2O
3, the oxide M nO of manganese
x(x≤2), nickel/cobalt composite oxide etc. also can be the mixtures of above-mentioned metal oxide.
Electrode preparation method of the present invention is also simpler.Present method is the salts solution with metal, as nitrate, acetate etc. the decompression or normal pressure (33Pa～normal pressure) under, the impregnated graphite body, become water-insoluble metal oxide 100～140 ℃ of dry backs in 250～400 ℃ of roastings then, again in polyurethane solution, under 33Pa～normal pressure, flood, dry after the taking-up.Perhaps the metal oxide that will be fired into by metal powder, nitrate, acetate, carbonate in advance is blended in the urethane, at decompression or normal pressure (33Pa～normal pressure) impregnated graphite body, takes out then and dries.The urethane that the present invention adopts is polyether-type (polypropylene glycol ether or polyglycerol ether) urethane, also can adopt PAUR.Polyurethane solution concentration is 6～80%(weight).Solvent is with lower boiling, volatile being advisable (being convenient to the room temperature volatilization), and the solvent of preferentially selecting for use has vinyl acetic monomer, acetone, chloroform etc.
Dipping time generally is 10～20 minutes and gets final product.
Because the urethane resin layer that immerses in the graphite is invaded certain depth by metal oxide, perhaps metal oxide is invaded the layer of polyurethane of whole thickness, the thermal conduction and the electronic conductivity of urethane have been improved, therefore, graphite material after metal oxide-polyurethane impregnated, under high temperature (near 100 ℃), have thermostability preferably, can be used for the high-temperature electrolysis process.The graphite anode of making like this is about 50 ℃ or in 85～95 ℃ of intensified electrolysis (30g/lHCl makes ionogen) test, the life-span ratio reaches 1.2～3.5, and promptly the life-span extends to 1.2～3.5 times; The chlorine overpotential reduces by 0.2～0.3 volt.
Be specific examples of the present invention below, in order to further specify working of an invention process and effect.
Example 1
The graphite rod of 30 * 35 * 200mm is put into impregnating autoclave, is evacuated to 8 * 10
3Pa injects 32%(weight) cobalt nitrate aqueous solution, emptying behind the submergence graphite rod stopped 10 minutes, the taking-up graphite rod is 125～140 ℃ of dryings 1 hour, again in 260～300 ℃ of roastings 30 minutes, cool to room temperature.This graphite rod is put into impregnating autoclave, be evacuated to 8 * 10
3Pa, injection 70%(weight) urethane (polyether-type, plastic molding and processing plant of Jinling Petrochemical Co. produces) vinyl acetic monomer solution, emptying behind solution submergence graphite rod stopped 20 minutes, took out graphite rod, wipe the urethane of remained on surface, under normal temperature and pressure, dry round the clock, obtain less energy-consumption, long-life graphite anode, wherein graphite: CoO through 3
4: urethane=100: 1.9: the 8(weight ratio).This graphite rod is made anode, and ionogen is a HCl solution, and the concentration when flowing into electrolyzer is 30g/l, and flow is the 10ml/ branch, 85～95 ℃ of electrolysis temperatures, current density 17A/dm
2Carry out the electrolysis contrast with this electrolytic experiment result and with the common graphite anode material under the same conditions as anode, the results are shown in Table 1.
Table 1 electrolysis contrast
Anode loss is than the life-span ratio
Common graphite anode 11
Graphite anode 0.637 1.57 of the present invention
The above-mentioned Graphite Electrodes that obtains is 80 ℃ of survey chlorine overpotentials in the 3MNaCl aqueous solution, fall 0.3 volt than the polyurethane-type graphite anode.
Example 2
Method with identical with example 1 is evacuated to 40Pa when wherein soaking cobalt nitrate aqueous solution, be evacuated to 33Pa when soaking urethane, polyurethane concentration 26%(weight), in the long lifetime graphite anode rod that obtains, graphite: Co
3O
4: urethane=100: 2.1: the 3.9(weight ratio).As anode, HCl solution is as electrolytic solution with this graphite anode rod, and inflow concentration is 30g/l, flow 10ml/ branch, 50～57 ℃ of electrolysis temperatures, current density 35A/dm
2The Shi Jinhang electrolysis, the electrolysis result contrast when its result and common graphite are anode sees Table 2.
Table 2 electrolysis contrast
Anode loss is than the life-span ratio
Common graphite anode 11
Polyurethane-type graphite anode 0.641 1.63
Graphite anode 0.289 3.46 of the present invention
The chlorine overpotential that this graphite anode is measured by example 1 condition is lower 0.3 volt than polyurethane-type graphite anode.
Example 3
By the method for example 1 manufacturing long lifetime graphite anode, polyurethane concentration is a 40%(weight), in the long lifetime graphite anode that obtains, graphite: Co
3O
4: urethane=100: 0.75: the 5(weight ratio).Make anode with this long lifetime graphite anode, HCl solution is ionogen, and the concentration when entering electrolyzer is 30g/l, flow 20ml/ branch, 89～95 ℃ of electrolysis temperatures, current density 17A/dm
2, carry out electrolysis in the above conditions, the electrolysis result contrast when its result and common graphite are made anode sees Table 3.Such long lifetime graphite anode rod is measured the chlorine overpotential by the method for example 1, and its chlorine overpotential reduces by 0.26 volt than polyurethane-type graphite anode.
Table 3 electrolysis contrast
Anode loss is than the life-span ratio
Common graphite anode 11
Graphite anode 0.81 1.23 of the present invention
Example 4
Make the long lifetime graphite anode with the method identical with example 1, different is to sneak into 3%(weight in the urethane in advance) Fe
3O
4Powder (＜10 μ m), in the long-life anode of making, graphite: Co
3O
4: Fe
3O
4: urethane=100: 1.5: 0.18: the 5.9(weight ratio).See Table 4 with electrolysis under example 2 the same terms and with common graphite anode results of comparison.
Table 4 electrolysis contrast
Anode loss is than the life-span ratio
Common graphite anode 11
Graphite anode 0.654 1.53 of the present invention
The chlorine overpotential that the graphite anode that the present invention makes records by example 1 method is than low 0.28 volt of the graphite anode of polyurethane-type.
Example 5
Sneak into Fe in the urethane
3O
4Powder and Co
3O
4Powder, thorough mixing is even, is made into then to contain 50%(weight) mixed liquor of vinyl acetic monomer.9.33 the graphite rod of * 6.75 * 120mm is put into impregnating autoclave, is evacuated to 8 * 10
3Pa injects above-mentioned feed liquid, does not have emptying behind the graphite rod, takes out graphite rod, wipes a small amount of urethane of remained on surface, dries.In the long lifetime graphite anode that obtains, graphite: Co
3O
4: Fe
3O
4: urethane=100: 1.3: 0.18: the 6.1(weight ratio).Compare by example 2 methods survey chlorine overpotential and with the polyurethane-type graphite anode, at 12A/dm
2When following, the chlorine overpotential of long-life anode is lower than 0.2 volt of the latter.
Example 6
Make long lifetime graphite anode rod by example 5 methods, different is not mix FeO in the urethane only to mix Co
3O
4, in the graphite anode rod of making, graphite: Co
3O
4: urethane=100: 0.64: the 4.3(weight ratio), the chlorine overpotential is at 30A/dm
2When following, be lower than 0.2 volt of polyurethane-type graphite anode.
Example 7
Make the long lifetime graphite anode by example 1 method, what they were different is to use 30%(weight) cobalt acetate solution replace cobalt nitrate solution, and in vacuum 9.3 * 10
3Pa dipping urethane feed liquid.In the long lifetime graphite anode that obtains, graphite: Co
3O
4: urethane=100: 1.26: the 1.69(weight ratio).The electrolysis contrast sees Table 5.
Table 5 electrolysis contrast
Anode loss is than the life-span ratio
Common graphite anode 11
Graphite anode 0.65 1.54 of the present invention
The above-mentioned long-life anode of making is measured the chlorine overpotential by example 1, low 0.3 volt of its numeric ratio polyurethane-type graphite anode.
Example 8
Make the long-life anode rod by example 1 method, different is to use 36.3%(weight) iron nitrate replacement cobalt nitrate solution, contain 2%(weight in the polyurethane solution) Fe
2O
3Powder.In the long-life anode rod that obtains, graphite: Fe
2O
3: urethane=100: 2.6: the 0.8(weight ratio).Condition by example 1 is carried out the electrolysis simultaneous test, the results are shown in Table 6.The chlorine overpotential of graphite anode of the present invention is at current density≤12A/dm
2Under the condition, than low 0.1 volt of polyurethane-type graphite anode.
Table 6 electrolysis contrast
Anode loss is than the life-span ratio
Common graphite anode 11
Graphite anode 0.855 1.2 of the present invention
In sum, the graphite anode life-span of the present invention is equivalent to 1.2～3.5 times of common graphite anodic, and the chlorine overpotential is than 0.1～0.3 volt of the reduction of urethane.And anode of the present invention can be used for high temperature (near 100 ℃) electrolysis.
Claims (5)
1, a kind of graphite anode that is used for chlorine industry, form by graphite body, it is characterized in that, topped metal oxide and the urethane in graphite body surface with electro catalytic activity, the ratio of graphite body and metal oxide, urethane is: graphite: metal oxide: urethane=100: 0.3～5: 0.8～20 (weight ratio), the metal oxide of said electro catalytic activity are Co
3O
4, Fe
3O
4, Fe
2O
3, MnO
xThe mixture of (x≤2), nickel/cobalt composite oxide or above-mentioned metal oxide.
2, graphite anode as claimed in claim 1, the proportioning that it is characterized in that graphite, metal oxide and urethane are 100: 0.4～1.5: 2～5(weight ratio).
3, a kind of manufacture method that is used for the graphite anode of chlorine industry, it is characterized in that, under 33Pa～normal pressure, be immersed in graphite body in acetate or the nitrate solution, the solution metal ion is Co, Fe, Mn, among the Ni one or more, dry down behind the taking-up airing at 100-140 ℃, again in 250～400 ℃ of roastings, cool to room temperature, be immersed in 6-80%(weight again) polyurethane solution in, take out airing, the pressure of above-mentioned double-steeping is 33Pa～normal pressure, and dipping time is 10～20 minutes, to reach in this electrode graphite: metal oxide: urethane=100: 0.3-5: the 0.8-20(weight ratio) be as the criterion.
4, a kind of manufacture method that is used for the graphite anode of chlorine industry, it is characterized in that, the metal oxide that metal powder, nitrate, acetate or carbonate are fired into is blended in the polyurethane solution, and impregnated graphite body under the 33Pa-condition of normal pressure takes out airing then.
As claim 3 or 4 described graphite anode manufacture method, it is characterized in that 5, urethane is polyether-type (polypropylene glycol ether or polyglycerol ether) or polyester type in the polyurethane solution, its solvent is vinyl acetic monomer, acetone or chloroform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107230 CN1020765C (en) | 1990-09-01 | 1990-09-01 | Graphite anode for chlor-alkali industry and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90107230 CN1020765C (en) | 1990-09-01 | 1990-09-01 | Graphite anode for chlor-alkali industry and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1059377A CN1059377A (en) | 1992-03-11 |
| CN1020765C true CN1020765C (en) | 1993-05-19 |
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ID=4880455
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90107230 Expired - Fee Related CN1020765C (en) | 1990-09-01 | 1990-09-01 | Graphite anode for chlor-alkali industry and manufacturing method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037015C (en) * | 1992-09-01 | 1998-01-14 | 太原工业大学 | Impregnation treatment of graphite anode for chlor-alkali industry |
| CN1062841C (en) * | 1998-03-06 | 2001-03-07 | 清华大学 | Current collecting composite material containing nm-carbon tube |
| CN102560531B (en) * | 2012-03-15 | 2015-01-21 | 上海交通大学 | Anti-oxidation treatment method for graphite anode for chlor-alkali industry |
| CN111850602B (en) * | 2020-07-01 | 2023-05-26 | 开封平煤新型炭材料科技有限公司 | Preparation method of composite graphite electrode for electrolysis of chloride aqueous solution |
-
1990
- 1990-09-01 CN CN 90107230 patent/CN1020765C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1059377A (en) | 1992-03-11 |
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