DE2554218A1 - Aqueous aluminium sulphate solutions prepn. - from aluminium sulphate solns. contg. sulphuric acid and alkaline sodium aluminate solns. - Google Patents
Aqueous aluminium sulphate solutions prepn. - from aluminium sulphate solns. contg. sulphuric acid and alkaline sodium aluminate solns.Info
- Publication number
- DE2554218A1 DE2554218A1 DE19752554218 DE2554218A DE2554218A1 DE 2554218 A1 DE2554218 A1 DE 2554218A1 DE 19752554218 DE19752554218 DE 19752554218 DE 2554218 A DE2554218 A DE 2554218A DE 2554218 A1 DE2554218 A1 DE 2554218A1
- Authority
- DE
- Germany
- Prior art keywords
- solutions
- solns
- sodium aluminate
- aluminum sulfate
- aluminium sulphate
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/68—Aluminium compounds containing sulfur
- C01F7/74—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
l'Verfahren zur Herstellung von l'Process for the preparation of
Aluminiumsulfat-Lösungen" Die Erfindung betrifft ein Verfahren zur Herstellung von wässerigen Aluminiumsulfat-Lösungen. Aluminum sulfate solutions "The invention relates to a method for Production of aqueous aluminum sulphate solutions.
Ausgangsmaterial für die technische Gewinnung von Aluminiumsulfat ist festes Aluminiumhydroxid, das mit Schwefelsäure umge setzt wird, oder Tonerde-haltiges Material, auf das man Schwefel säure einwirken läßt (sh. Ullmanns Encyklopädie der technischen Chemie, 4. Auflage, 1974, Bd. 7, Seiten 33435).Starting material for the technical extraction of aluminum sulphate is solid aluminum hydroxide that is reacted with sulfuric acid, or it contains alumina Material on which sulfuric acid is allowed to act (see Ullmanns Encyklopadie der technical chemistry, 4th edition, 1974, vol. 7, pages 33435).
Aluminiumsulfat wird als festes Produkt gewonnen. Durch Auflösen in Wasser werden aus diesem festen Produkt wässerige Aluminiumsulfat-Lösungen hergestellt.Aluminum sulfate is obtained as a solid product. By dissolving in Water, aqueous aluminum sulfate solutions are produced from this solid product.
Die Erfindung hat sich die Aufgabe gestellt, ein Verfahren zur Herstellung von Alumniumsulfat-Lösungen aus Lösungen, die aöglichst preiswert zur Verfügung stehen, zu schaffen.The object of the invention is to provide a method for production of aluminum sulfate solutions from solutions that are available as inexpensively as possible stand to create.
Erfindungsgemäß ist dieses Verf@hren d a d u r c h g e k e n n z e i c h n e t, daß schwefelsaure Alu@inumsulfat-Lösungen mit so viel alkal schen Natriumaluminat-Lösungen ungesetzt werden, daß die gewonnenen Aluminiumsulfat-Lösungen einen 15 bis 70 gil Aluminiumoxid entsprechenden Aluminium-Gehalt und einen 2 bis 65 gil Natriumoxld entsprechenden Natriui-Gehalt aufweisen.According to the invention, this method is not applicable i c h n e t that sulfuric acid aluminum sulfate solutions with so much alkaline sodium aluminate solutions be unset that the aluminum sulfate solutions obtained have a 15 to 70 gil Aluminum oxide corresponding aluminum content and a 2 to 65 gil sodium oxide have a corresponding Natriui content.
DAe umsetzung wird bevorzugt bei einer Texpetatur zwischen 30 und 90° C durchgeführt.The implementation is preferred for textures between 30 and 90 ° C carried out.
Für das erfindungsgemäße Verfahren haben sich besonders die in -Eloxalbetrieben und Scheideanstalten anfallenden Abfallösungen bewährt. Diese AbfalIösungen mußten bisher vor des Einleiten in das Kanalnetz nit Katronlauge bzw. Schwefelsäure oder durch Vermischen-miteinander neutralisiert werden (sh. 0. Borchert: "Abwässer aus der chemischen Oberflächenbehandlung", 1965, Seite 20, Absatz 3.2.2.2, und R. weiner : "Die Abseässer der Galvanotecbnik und Metallindustrie", 1973, Seite 32, Absatz 2).For the method according to the invention, the in-anodising companies in particular have proven themselves and refiners has proven its worth in waste solutions. These waste solutions had to previously before discharge into the sewer network with caustic soda or sulfuric acid or be neutralized by mixing with one another (see 0. Borchert: "Wastewater from der chemical surface treatment ", 1965, page 20, paragraph 3.2.2.2, and R. weiner : "Die Abseässer der Galvanotecbnik und Metallindustrie", 1973, page 32, paragraph 2).
Du erfindungagemäße Verfahren bringt den Vorteil, daß aus diesen Abfallösungen ein technisch zu verwertendes Produkt erhalten wird.You according to the invention method has the advantage that from these waste solutions a technically usable product is obtained.
Die alkalischen Natriumaluminat-Lösungen können noch, bezogen auf den Natriumaluminat-Gehalt, bis zu 5 Gewichts-% Kali und/oder 5 Gewichts-% Magnesiumverbindungen enthalten Die gewonnenen wässerigen Aluminiumsulfat-Lösungen können bis zu 50 g/1 freie Schwefelsäure, aber immer weniger als die ausgangalösung, enthalten, Sie können aber auch gegenüber dem 15 bis 70 g/l Aluminiumoxid theoretisch entsprechenden,auf Al2(SO4)3 . 18 H2O berechneten Sulfat-Gehalt einen uns bis zu geringeren Sulfat-Gehalt aufweisen.The alkaline sodium aluminate solutions can still, based on the sodium aluminate content, up to 5% by weight of potash and / or 5% by weight of magnesium compounds The aqueous aluminum sulfate solutions obtained can contain up to 50 g / 1 You can contain free sulfuric acid, but always less than the starting solution but also compared to the theoretically corresponding 15 to 70 g / l aluminum oxide Al2 (SO4) 3. 18 H2O calculated sulphate content is up to a lower sulphate content exhibit.
Besonders bewährt hat es sich. die nach des erfindungsgeräßen Verfahren hergestellten Aluminiumsulfat-Lösungen für die Abwasserklärung oder Wasseraufbereitung zu verwenden.It has particularly proven itself. according to the method according to the invention manufactured aluminum sulfate solutions for wastewater treatment or water treatment to use.
Durch das erfindungsgemäße Verfahren werden die betrieblichen Kläranlagen entlastet, da nur noch die wenig verschmutzten Spülwässer aus den Beizanlagen anfallen. Außerdem verringert sich der Aufwand für die Schlammbehandlung und für die Beseitigung des anfallenden Filterkuchens.With the method according to the invention, the operational sewage treatment plants Relieved, as only the slightly contaminated rinsing water from the pickling plants is obtained. In addition, the effort for sludge treatment and disposal is reduced of the resulting filter cake.
Ein weiterer Vorteil ist die Einsparung von Wasser, das bisher zur Herstellung von Aluminiumsulfat-Lösungen durch Auflösen von festem Aluminiumsulfat erforderlich war. Durch das erfindungagemäße Verfahren wird eine für die Abwasserklärung und Wasseraufbereitung gebrauchsfertige Lösung direkt erhalten.Another advantage is the saving of water that was previously used for Production of aluminum sulphate solutions by dissolving solid aluminum sulphate was required. The method according to the invention is used for waste water treatment and water treatment get ready-to-use solution directly.
Eine Ausführung des erfindungsgemäßen Verfahrens wird in dem folgenden Beispiel beschrieben und in der Zeichnung schematisch dargestellt.An embodiment of the method according to the invention is shown in the following Example described and shown schematically in the drawing.
Beispiel In des1O m3-Tank 1 werden 23,3 m3 schwefelsaure Aluminiumsulfat.LasunS (28,5 gyl A12O3, 175 g/l freie Schwefelsäure) sit der Kreiselpumpe 2 umgewälzt. Durch die von der Druckleitung der Pulpe 2 abzweigende Leitung zu dem 4 m3-Becken 3 staut ein Teil der schwefel sauren Aluminiumsulfat-Lösung in das Becken 3, in das kontinuierlich mit einer Geschwindigkeit von etwa 900 lIh 5 alkalische Natriumaluminat-Lösung (152 g/1 Al2O3 als Aluminat, 167 g/1 Na2O) fließen. Ist das Becken 3 zu zwei Dritteln gefüllt, wird die Pumpe 4 durch den Nivesuschalter 5 eingeschaltet und die Mischung aus dem Becken 3 solange in den Tank 1 gefördert, bis das Becken 3 nur noch zu einem Drittel gefüllt ist. Dann strömt wieder schwefelsaure Aluminiumzulfat-Lösung in das Becken 3.Example In des1O m3 tank 1, 23.3 m3 of sulfuric acid aluminum sulfate. LasunS (28.5 gyl A12O3, 175 g / l free sulfuric acid) sit in the centrifugal pump 2. Through the line branching off from the pulp pressure line 2 to the 4 m3 basin 3 accumulates part of the sulphurous aluminum sulphate solution in the basin 3, in this continuously at a rate of about 900 lIh 5 alkaline sodium aluminate solution (152 g / 1 Al2O3 as aluminate, 167 g / 1 Na2O) flow. Is the pelvis 3 to two thirds filled, the pump 4 is switched on by the level switch 5 and the mixture promoted from the basin 3 into the tank 1 until the basin 3 only becomes one Third is filled. Then sulfuric acid aluminum sulfate solution flows in again the pelvis 3.
Nachdem die gesamte alkali@che Natriumaluminat-Lösung in den Tank 1 gefördert wurde, wird der ca. 450 C warme Tank-Inhalt zwei Stunden lang mit Hilfe der Pumpe 2 umgepumpt. Anschließend wird die Reaktionalö@ung vier Stunden stehengelassen, damit sich aventuall vorhandene Schwebstoffe absetzen können.After all the alkaline sodium aluminate solution in the tank 1, the approx. 450 C warm tank contents are used for two hours pump 2 circulated. The reaction solution is then left to stand for four hours, so that aventuall existing suspended matter can settle.
Die erhaltene Aluminiumsulfat-Lösung weist einen Aluminium-Gehalt von 50,3 gil, berechnet als Al203, und einen Natrium-Gehalt von 30 g/1, berechnet als Na2O, auf.The aluminum sulfate solution obtained has an aluminum content of 50.3 g / l, calculated as Al 2 O 3, and a sodium content of 30 g / l as Na2O.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE19752554218 DE2554218A1 (en) | 1975-12-03 | 1975-12-03 | Aqueous aluminium sulphate solutions prepn. - from aluminium sulphate solns. contg. sulphuric acid and alkaline sodium aluminate solns. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE19752554218 DE2554218A1 (en) | 1975-12-03 | 1975-12-03 | Aqueous aluminium sulphate solutions prepn. - from aluminium sulphate solns. contg. sulphuric acid and alkaline sodium aluminate solns. |
Publications (1)
Publication Number | Publication Date |
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DE2554218A1 true DE2554218A1 (en) | 1977-08-25 |
Family
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Family Applications (1)
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DE19752554218 Pending DE2554218A1 (en) | 1975-12-03 | 1975-12-03 | Aqueous aluminium sulphate solutions prepn. - from aluminium sulphate solns. contg. sulphuric acid and alkaline sodium aluminate solns. |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0005419A1 (en) * | 1978-05-03 | 1979-11-14 | Boliden Aktiebolag | Aluminium sulphate compositions containing polynuclear complexes and a method of producing the same and the use thereof |
EP0062015A1 (en) * | 1981-03-23 | 1982-10-06 | Boliden Aktiebolag | Aluminium sulphate composition for water-purifying, paper-sizing and plant dewatering purposes and a method for producing the composition |
US4877597A (en) * | 1988-10-25 | 1989-10-31 | Handy Chemicals Ltd. | Method for producing aqueous solutions of basic poly aluminum sulphate |
US4981675A (en) * | 1988-11-03 | 1991-01-01 | Handy Chemicals Ltd. | Polymeric basic aluminum silicate-sulphate |
DE4036116A1 (en) * | 1990-11-13 | 1992-05-14 | Beiersdorf Ag | Purifying waste water using flocculating agent system - comprises adding aluminium chloride, poly:aluminium chloride or poly:aluminium sulphate and aluminate to waste water |
DE19607300A1 (en) * | 1996-02-27 | 1997-08-28 | Klaus Dipl Ing Klein | Method and device for producing salt solutions |
WO2002036492A1 (en) * | 2000-10-31 | 2002-05-10 | Heiko Weber | Method for disposing of waste, produced in an aluminium anodisation plant |
-
1975
- 1975-12-03 DE DE19752554218 patent/DE2554218A1/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0005419A1 (en) * | 1978-05-03 | 1979-11-14 | Boliden Aktiebolag | Aluminium sulphate compositions containing polynuclear complexes and a method of producing the same and the use thereof |
EP0062015A1 (en) * | 1981-03-23 | 1982-10-06 | Boliden Aktiebolag | Aluminium sulphate composition for water-purifying, paper-sizing and plant dewatering purposes and a method for producing the composition |
US4877597A (en) * | 1988-10-25 | 1989-10-31 | Handy Chemicals Ltd. | Method for producing aqueous solutions of basic poly aluminum sulphate |
US4981675A (en) * | 1988-11-03 | 1991-01-01 | Handy Chemicals Ltd. | Polymeric basic aluminum silicate-sulphate |
DE4036116A1 (en) * | 1990-11-13 | 1992-05-14 | Beiersdorf Ag | Purifying waste water using flocculating agent system - comprises adding aluminium chloride, poly:aluminium chloride or poly:aluminium sulphate and aluminate to waste water |
DE19607300A1 (en) * | 1996-02-27 | 1997-08-28 | Klaus Dipl Ing Klein | Method and device for producing salt solutions |
EP0792838A1 (en) * | 1996-02-27 | 1997-09-03 | Klaus Klein | Process and apparatus for the preparation of salt solutions |
WO2002036492A1 (en) * | 2000-10-31 | 2002-05-10 | Heiko Weber | Method for disposing of waste, produced in an aluminium anodisation plant |
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