CN1172078A - Electrochemical method for preparing multifunctional compound high iron-aluminium flocculating agent - Google Patents
Electrochemical method for preparing multifunctional compound high iron-aluminium flocculating agent Download PDFInfo
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- CN1172078A CN1172078A CN 97116358 CN97116358A CN1172078A CN 1172078 A CN1172078 A CN 1172078A CN 97116358 CN97116358 CN 97116358 CN 97116358 A CN97116358 A CN 97116358A CN 1172078 A CN1172078 A CN 1172078A
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Abstract
The present invention discloses an electrochemical preparation method of multifunctional compound high iron-aluminium flocculant and its product. It uses sodium aluminate waste alkali which is produced in the course of aircraft manufacture (or similar production course) and contains 10% of Al2O3 anda proper quantity of additive as anolyte is added, uses general sheet iron or low-carbon steel as anode, and uses metal nickel sheet as cathode, and in the multipole electrolytic tank using specific ion exchange membrane as compartment diaphragm, it adopts the multipole parallel connection mode, so that under the condition of low voltage and high current, said invention can prepare the compound high iron-aluminium water-treatment flocculant containing 1.0% of Na2FeO4 and 10% of Al2O3 and possessing the functions of oxidation, sterilizing and flocculation.
Description
The present invention relates to a kind of is raw material with sodium aluminate alkalescence waste liquid, utilize the electrochemical process of iron anode stripping to prepare the method for high-efficiency multi-function flocculation agent, specific product is a kind of oxidisability flocculation agent liquid that mainly contains high ferro, sodium aluminate and alkali, belongs to the production and the Application Areas of water treatment agent.
The inorganic flocculating agent that uses or be seen in report at present mostly is the water treatment agent with simple function.As aluminium based flocculating agents such as polymeric aluminum, Tai-Ace S 150, aluminum chlorides, iron-based flocculating agents such as polymerization iron, iron trichloride only have the cohesion flocculation performance in water, and do not have oxidation and germicidal action.But complicated along with the aggravation of environmental pollution and water pollution presses for a kind of tool oxidation, flocculation, sterilization and is adsorbed as the high-efficiency multi-function water treatment agent of one, to satisfy the requirement of purification of water quality.Ferrate is the sexavalence compound of iron, has special integrated water treatment efficiency.It is a kind of strong oxidizer in water, can oxidation removal organic or inorganic pollutent wherein; Have brute force sterilization and disinfection effect fast, its comprehensive effectiveness is better than chlorine; Newly-generated Fe in high ferro or its redox processes
3+Be good flocculation agent or coagulant aids, especially more effective to the surface water of handling little pollution; Simultaneously, its redox processes product also has important adsorptive power, and the pollutant removal in the water is had synergy.High ferro and aluminium salt being carried out compound, can further strengthen the throwing out of high iron product, improve its integrated water treatment efficiency, is a kind of ideal high-efficiency multi-function water treatment agent product innovation.
U.S. patent of invention US 4435257 adopts electrochemical method to prepare the alkali lye that contains high ferro earlier, and the back adds the KOH precipitating and purifies with organic solvent, has prepared pure K at last
2FeO
4Crystal; U.S. patent of invention US 4451338 adopts electrochemical method to prepare the high ferro calcium product on the basis of Na2Fe04; U.S. patent of invention US 4500499 has invented and has passed through Na
2FeO
4Potassium ferrate solid method is stablized in preparation.But these methods all are to prepare pure K
2FeO
4Crystal is a target, and complicated operation, cost costliness are not suitable for use in the production and the application of water treatment agent.
The present invention is with on-site preparation and use compound high iron-aluminium flocculating agent liquid to be target, adopting aircraft factory depleted sodium aluminate alkali lye is main raw material, by film electrolytic synthesis technology, prepared the compound high iron oxidizing flocculant that contains Na2Fe04, sodium aluminate, sodium hydroxide and water.Concrete grammar of the present invention is as follows:
1, electrolysis reactor.Electrolyzer is the PVC plate weldering system of 5mm by thickness, it is of a size of 19.4 * 14.0 * 10.6cm, comprise an anolyte compartment and two cathode compartments, the anolyte compartment is in the centre, two cathode compartments are respectively in the both sides of anolyte compartment, the anolyte compartment is of a size of 6.1 * 14.0 * 10.6cm, and the size of two cathode compartments is respectively 5.9 * 14.0 * 10.6cm.Separate with ion-exchange membrane between the anode chamber and the cathode chamber, selected film is a perfluorinated sulfonic acid ion exchange membrane, and model is Nafion 324 composite membranes, and thickness is 0.23mm, produces by Shanghai is organic.Before use, the reply film carries out pre-treatment, and method is to soak 48 hours with saturated NaOH liquid, uses deionized water drip washing to neutral then, pressing, treat airing after, be fixed on the PVC lath framework, the effective ion exchange area is 11.3 * 8.9cm
2Anode adopts mild steel plate or the iron plate of 10.0 * 7.0cm, drenches or uses the sand papering light through pickling and water before using.Negative electrode adopts the nickel plate of 10.0 * 7.0cm.With the parallel respectively barrier film both sides that are suspended in of two positive plates and two negative plates, each spread of electrodes film 0.55cm, the positive and negative interpole gap is 1.1cm, two anodes are taked respectively with two negative electrodes and get the connection mode to be connected.Power supply adopts the AC-DC conversion voltage stabilized source, and maximum output current is 30A, and maximum output voltage is 15V.For increasing the solution mass transfer, reducing concentration polarization, use inorganic speed change agitator continuously stirring, stirring arm and connecting rod thereof are that glass is made, stirring velocity is controlled at 50 rev/mins.Electrolysis reactor and mode of connection thereof, as shown in drawings.
2, electrolytic anode liquid.Get from Beijing aviation manufactory and to contain the aluminium alkaline waste liquor, wherein contain Al
2O
310%, NaOH35%, water 55%.This contains the aluminium alkali wasteliquid and still be transparence after placing, and does not have precipitation and separates out, thereby can directly be used as electrolytic preparation liquid, and concentrated base that also can 35-45% is diluted to needed concentration use.
3, electrolysis cathode liquid.The NaOH solution of use 40% is made catholyte, and NaOH adds the distilled water preparation by solid industry.
4, electrolysis additive.Get 20 gram NaCl, 20 gram Na
3PO
4(containing 12 crystal water), 20 gram NaCOOCH
3With 20 gram Na
2SiO
3Solid mixes, take by weighing during use a certain amount of, and with the dissolving of a small amount of electrolytic solution.
5, electrical parameter.Electrolyzer is pressed and electric current can be controlled by power supply, for avoiding anodic polarization, should obtain the effect of low-voltage and high-current.For this reason, generally control voltage and be lower than 5V, and can improve the strength of current that same electrical is depressed with an amount of electrolysis additive of adding by multipole electrode is in parallel.
Concrete preparation process is: add the liquid that contains useless stoste of aluminium alkalescence or dilution that amounts to 650ml in anode slot, wherein contain the electrolysis additive of about 0.8wt%, the liquid level of electrolytic solution is advisable so that the interpolar barrier film is flooded.40% the NaOH solution that in two cathode can, adds 660ml respectively.Anode and negative electrode be respectively parallel the suspending in positive and negative utmost point chamber near the film both sides, interpole gap 1.1cm, and two anodes are connected with the positive and negative electrode of power supply respectively with parallel way with two negative electrodes.Whipping appts is installed, 50 rev/mins of speed governing.Open electrolysis power, put voltage in 3-5V, corresponding electric current is 0.4-4.0A, and electric current and voltage are with accurate multitester measuring.Mauve FeO after beginning, electrolytic preparation is arranged immediately
4 2-Generate, electrolysis 3-8 hour, can prepare Na
2FeO
4Content is 0.08%-1.03%, Al
2O
3High ferro alumina flocculation agent liquid product for 2-10%.
The content of high ferro takes the chromite oxidation style to measure in the electrolytic solution product.
Outstanding feature of the present invention is:
1, high ferro and aluminium are compound.By being raw material to contain aluminium alkali lye, prepared the oxidized form flocculation agent liquid product of high ferro and aluminium coexistence, this product has been strengthened its flocculation function when keeping high ferro oxidation, germicidal action.
2, waste water utilization.Aircraft factory (or similar waste product of other production process) is produced contains the not markon's land used discharging of aluminium waste lye, not only can cause environmental pollution, and waste precious resources.But this chemical constitution and the characteristic thereof that contains the aluminium waste lye meets the requirement for preparing high ferro alumina flocculation agent just, is a kind of a kind of main raw material of ideal novel flocculant electrolytic preparation.Simultaneously, owing to be utilization of waste material, production cost is reduced greatly.
3, on-site preparation, use.Because the unstable of high ferro, the high iron-aluminium flocculating agent liquid by the present invention's preparation will use in back 3 days in the site of deployment preparation and in preparation.And adopt method production high iron-aluminium flocculating agent operation preparation process of the present invention very simple and convenient, meet very much on-site preparation and use.
4, use the combined electrolysis solution additive.In electrolytic solution, add a certain proportion of several inorganic chemistry medicaments, effectively improved electrolytic preparation efficient and high ferro productive rate, and improved the stability of high ferro to a certain extent.
Embodiment example 1:
Get and contain aluminium alkaline waste liquor 130ml, add the alkali lye 520ml that contains industrial NaOH 35%, be made into 650ml and contain Al
2O
32% anolyte all places the anolyte compartment of electrolyzer, adds the alkali lye 660ml that contains industrial NaOH 40% respectively at two cathode compartments.Implement electrolytic preparation under the following conditions:
Electrode anode: soft steel, 10.0 * 7.0cm, 2
Negative electrode: tool hole nickel plate, 10.0 * 7.0cm, 2
Electrolysis power: D.C. regulated power supply (but constant current)
Circuit connects: parallel connection
Interelectrode distance: each spread of electrodes diaphragm for electrolytic cell 0.55cm, positive and negative interpole gap 1.1cm
Voltage: 4.0V
Strength of current: 0.2-1.57A
Temperature: 32.5-42.5 ℃
Final electrolysis time: 8 hours
In different electrolysis times, contain Na in the electrolytic preparation liquid
2FeO
4And Al
2C
3Concentration be:
Place after 24 hours, each main component is constant in final (electrolysis 8 hours) electrolytic preparation liquid.Example 2
In the anolyte of being prepared as example 1, add 5 gram solid electrolytic solution additive and stirring and dissolving, all place the anolyte compartment of electrolyzer then, catholyte and the electrolytic preparation condition of being implemented and example 1 are together, just after having added electrolysis additive, under same 4V voltage, electric current obviously increases, in whole electrolytic preparation process, current stabilization between 2.01-2.18V, temperature 31 ℃ when electrolysis begins rise to electrolysis when finishing (8 hours) 40 ℃.
In different electrolysis times, contain Na in the electrolytic preparation liquid
2FeO
4And Al
2O
3Concentration be:
Place after 24 hours, each main component is constant in final (electrolysis 8 hours) electrolytic preparation liquid.Example 3:
Get and contain aluminium alkaline waste liquor stoste 650ml and (contain Al
2O
310%), all place the anolyte compartment of electrolyzer, add the alkali lye 660ml that contains industrial NaOH 35% respectively at two cathode compartments, catholyte and example 1,2 are together.Implement electrolytic preparation under the following conditions:
Electrode anode: soft steel, 10.0 * 7.0cm, 2
Negative electrode: tool hole nickel plate, 10.0 * 7.0cm, 2
Electrolysis power: D.C. regulated power supply (but constant current)
Circuit connects: parallel connection
Interelectrode distance: each spread of electrodes diaphragm for electrolytic cell 0.55cm, positive and negative interpole gap 1.1cm
Voltage: 5.0V
Strength of current: 1.58-2.95A
Temperature: 30.5-41.5 ℃
Final electrolysis time: 8 hours
In different electrolysis times, contain Na in the electrolytic preparation liquid
2FeO
4And Al
2O
3Concentration be:
Place after 24 hours, each main component is constant in final (electrolysis 8 hours) electrolytic preparation liquid.Example 4:
Get and contain aluminium alkaline waste liquor stoste and (contain Al
2O
310%) 650ml adds 5 gram electrolysis additives, all places the anolyte compartment after the stirring and dissolving.Catholyte and the electrolytic preparation condition of being implemented and example 1 are together, just after having added electrolysis additive, under same 5V voltage, electric current obviously increases, in whole electrolytic preparation process, current stabilization between 2.80-3.74V, temperature 33.5 ℃ when electrolysis begins rise to electrolysis when finishing (8 hours) 40.5 ℃.
In different electrolysis times, contain Na in the electrolytic preparation liquid
2FeO
4And Al
2O
3Concentration be:
Claims (3)
1, utilize multipole parallel connection and perfluorinated ion-exchange membrane to be negative electrode, to contain the aluminium alkaline waste liquor or its alkaline diluent is an electrolytic solution, the method for electrolytic preparation compound high iron alumina flocculation agent for anode, nickel plate for the electrochemical reactor of principal character, iron plate (or soft steel).
2, the high ferro alumina flocculation agent liquid product of electrolytic preparation wherein contains Na
2FeO
40.1-1.0% contains Al
2O
31.0-10.0%.
3, the electrolysis additive of electrolytic preparation high ferro alumina flocculation agent wherein contains 25%Na
3PO
4(containing 12 crystal water), 25%NaCl, 25%NaCOOCH
3And 25%Na
2SiO
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97116358 CN1097562C (en) | 1997-08-18 | 1997-08-18 | Electrochemical method for preparing multifunctional compound high iron-aluminium flocculating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97116358 CN1097562C (en) | 1997-08-18 | 1997-08-18 | Electrochemical method for preparing multifunctional compound high iron-aluminium flocculating agent |
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| Publication Number | Publication Date |
|---|---|
| CN1172078A true CN1172078A (en) | 1998-02-04 |
| CN1097562C CN1097562C (en) | 2003-01-01 |
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ID=5173792
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97116358 Expired - Fee Related CN1097562C (en) | 1997-08-18 | 1997-08-18 | Electrochemical method for preparing multifunctional compound high iron-aluminium flocculating agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067962C (en) * | 1998-07-13 | 2001-07-04 | 彭继增 | Process for producing poly-iron chloride |
| CN102010034A (en) * | 2010-12-21 | 2011-04-13 | 北京碧水源膜科技有限公司 | Preparation device of ferron used for water treatment and application method thereof |
| CN109252181A (en) * | 2018-09-13 | 2019-01-22 | 湖南工程学院 | A kind of method of electrolytic preparation hexafluoro sodium ferrite |
| CN114853129A (en) * | 2022-05-23 | 2022-08-05 | 常州清流环保科技有限公司 | In-situ composite aluminum ferrite water treatment agent and preparation method and application method thereof |
-
1997
- 1997-08-18 CN CN 97116358 patent/CN1097562C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067962C (en) * | 1998-07-13 | 2001-07-04 | 彭继增 | Process for producing poly-iron chloride |
| CN102010034A (en) * | 2010-12-21 | 2011-04-13 | 北京碧水源膜科技有限公司 | Preparation device of ferron used for water treatment and application method thereof |
| CN102010034B (en) * | 2010-12-21 | 2012-07-04 | 北京碧水源膜科技有限公司 | Preparation device of ferron used for water treatment and application method thereof |
| CN109252181A (en) * | 2018-09-13 | 2019-01-22 | 湖南工程学院 | A kind of method of electrolytic preparation hexafluoro sodium ferrite |
| CN114853129A (en) * | 2022-05-23 | 2022-08-05 | 常州清流环保科技有限公司 | In-situ composite aluminum ferrite water treatment agent and preparation method and application method thereof |
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| Publication number | Publication date |
|---|---|
| CN1097562C (en) | 2003-01-01 |
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