DE19826186B4 - Process for producing an iron hydroxide and a polymer-containing adsorbent / reactant and its use - Google Patents
Process for producing an iron hydroxide and a polymer-containing adsorbent / reactant and its use Download PDFInfo
- Publication number
- DE19826186B4 DE19826186B4 DE1998126186 DE19826186A DE19826186B4 DE 19826186 B4 DE19826186 B4 DE 19826186B4 DE 1998126186 DE1998126186 DE 1998126186 DE 19826186 A DE19826186 A DE 19826186A DE 19826186 B4 DE19826186 B4 DE 19826186B4
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- Prior art keywords
- iron hydroxide
- water
- reactant
- iron
- dispersion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Verfahren zur Herstellung eines Eisenhydroxid und ein Polymer enthaltenden Adsorptionsmittels/Reaktionsmittels in stückiger Form, dadurch gekennzeichnet, dass eine wässrige Polymer-Dispersion in Eisenhydroxid in in Wasser dispergierbarer Form eingemischt wird und dann entweder die Dispersion unter Erlangung eines festen Zustandes getrocknet und das feste Material anschließend mechanisch in die gewünschte Form und/oder Größe zerkleinert wird oder die Dispersion gegebenenfalls nach einer Vortrocknung im halbfesten Zustand einer mechanischen Formgebung und anschließenden (weiteren) Trocknung unter Erlangung eines festen Zustandes unterzogen wird.method for the preparation of an iron hydroxide and a polymer containing Adsorbent / reactant in lumpy form, characterized in that that a watery Polymer dispersion in iron hydroxide in water dispersible Form is mixed in and then obtaining either the dispersion of a solid state and then the solid material mechanically in the desired one Shape and / or size crushed or the dispersion, if necessary after predrying in the semi-solid state of mechanical shaping and subsequent (further) drying is subjected to a solid state.
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Eisenhydroxid und ein Polymer enthaltenden Adsorptionsmittels/Reaktionsmittels in stückiger Form, und seine Verwendung.The The invention relates to a method for producing an iron hydroxide and a polymer-containing adsorbent / reactant in lumpy Form, and its use.
Generell lässt sich ein eisenhydroxidhaltiges Adsorptionsmittel/Reaktionsmittel im Bereich der Wasserreinigung oder Gasreinigung einsetzen. Bei der Wasserreinigung wird dieses Mittel in horizontal oder vertikal durchströmten Filtern oder durch Zugabe zu dem zu behandelnden Wasser für die Abscheidung von gelösten Phosphaten, Arsenaten, Sulfiden und Schwermetallen aus Trinkwasser, Brauchwasser, industriellem Abwasser, Mineral- und Heilwasser sowie Gartenteich- und Agrarwasser eingesetzt. Möglich ist auch der Einsatz in so genannten reaktiven Wänden zur Abscheidung der genannten Schadstoffe aus Grund- und Sickerwasserleitern von kontaminierten Standorten (Deponien).As a general rule let yourself an iron hydroxide-containing adsorbent / reactant in the area water or gas cleaning. When cleaning water this medium is used in filters with horizontal or vertical flow or by adding to the water to be treated for the deposition of solved Phosphates, arsenates, sulfides and heavy metals from drinking water, Industrial water, industrial waste water, mineral and medicinal water as well Garden pond and Agricultural water used. Possible is also the use in so-called reactive walls to separate the above Pollutants from groundwater and leachate from contaminated Locations (landfills).
Bei der Gasreinigung wird das Mittel in Adsorbern für die Bindung von Schwefelwasserstoff, Mercaptanen und Blausäure eingesetzt.at gas cleaning becomes the agent in adsorbers for binding hydrogen sulfide, mercaptans and hydrocyanic acid used.
Es sind verschiedenartige Verfahren bekannt, um mit Hilfe von Adsorptionsmitteln die genannten Schadstoffe aus wäßrigen Systemen zu entfernen.It Various methods are known to use adsorbents the pollutants mentioned from aqueous systems to remove.
So
wird der
Zum
Entfernen von Schadstoffen aus Wasser beschreibt die
In
der
Aus
der
Den genannten Verfahren liegt der gemeinsame Nachteil zugrunde, daß die jeweilige für die selektive Adsorption von Wasserinhaltsstoffen verantwortliche Komponente mit hohen Mengen an Zuschlagstoffen versetzt werden muß, um eine Formgebung zu Granulaten zuzulassen. Hierdurch erniedrigt sich in deutlichem Maße die Bindekapazität für Wasserschadstoffe.The mentioned method is based on the common disadvantage that the respective for the component responsible for selective adsorption of water constituents with large amounts of additives must be added to a Allow shaping into granules. This lowers itself in clear measure the binding capacity for water pollutants.
In
der
In
der
Die
Es ist daher die Aufgabe der vorliegenden Erfindung, ein Verfahren zur Herstellung eines Eisenhydroxid und ein Polymer enthaltenden Adsorptionsmittels/Reaktionsmittels in stückiger Form anzugeben, das ein Mittel mit hoher mechanischer Stabilität und einem hohen Bindevermögen für in Wasser oder Gas enthaltene Schadstoffe ergibt.It is therefore the object of the present invention, a method for the preparation of an iron hydroxide and a polymer containing To specify adsorbent / reactant in lump form, the an agent with high mechanical stability and a high binding capacity for in water or gas contains pollutants.
Diese Aufgabe wird erfindungsgemäß gelöst durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale. Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens sowie bevorzugte Verwendungen eines nach diesem Verfahren hergestellten Adsorp tionsmittels/Reaktionsmittels ergeben sich aus den Unteransprüchen.This The object is achieved by the features specified in the characterizing part of claim 1. Advantageous developments of the method according to the invention and preferred Uses of an adsorbent / reactant produced by this method result from the subclaims.
Dadurch, daß eine wäßrige Polymer-Dispersion in Eisenhydroxid in in Wasser dispergierbarer Form eingemischt wird und dann entweder die Dispersion unter Erlangung eines festen Zustandes getrocknet und das feste Material anschließend mechanisch in die gewünschte Form und/oder Größe zerkleinert wird oder die Dispersion gegebenenfalls nach einer Vortrocknung im halbfesten Zustand einer mechanischen Formgebung und anschließenden (weiteren) Trocknung unter Erlangung eines festen Zustandes unterzogen wird, erhält man ein Material, bei welchem das Eisenhydroxid fest in das Polymer eingebettet ist und daß, wie Untersuchungen gezeigt haben, eine hohe Bindekapazität für die üblicherweise in Abwässern oder Abgasen enthaltenen Schadstoffe aufweist.Thereby, that a aqueous polymer dispersion is mixed in iron hydroxide in water-dispersible form and then either the dispersion to obtain a solid state dried and the solid material then mechanically into the desired shape and / or size crushed or the dispersion, if necessary after predrying in the semi-solid state of mechanical shaping and subsequent (further) Undergoes drying to achieve a solid state, receives a material in which the iron hydroxide is firmly embedded in the polymer is and that As studies have shown, a high binding capacity for the usual in sewage or contains exhaust gases.
Geeignete Comonomere für die Verwendung in der Polymer-Dispersion sind Vinylacetat-, Ethylen-, Styrol-, Acrylsäureester-, Acrylnitril-, Glyzerin-, Melamin-, Phenol- und Harnstoffharze. Weiterhin können der Dispersion die Comonomere vernetzende Reaktionspartner zugegeben werden.suitable Comonomers for the use in the polymer dispersion are vinyl acetate, ethylene, styrene, acrylic acid ester, Acrylonitrile, glycerin, melamine, phenol and urea resins. Farther can the Dispersion reactants crosslinking the comonomers are added become.
Das Eisenhydroxid ist im Ausgangszustand vorzugsweise pastös, wobei die Paste einen Wassergehalt zwischen 10 und 90 Gew.% aufweisen kann. Besonders geeignet hierfür ist ein Eisenhydroxid enthaltendes Abprodukt aus der Aluminiumherstellung (Rotschlamm) oder der Wasseraufbereitung (Wasserwerksschlamm). Es kann jedoch auch frisches Eisenhydroxid verwendet werden, das durch Fällung aus Eisen(III)salzlösungen durch Neutralisation oder aus Eisen(II)salzlösungen durch Neutralisation und Oxidation gewonnen wurde.The Iron hydroxide is preferably pasty in the initial state, wherein the paste has a water content of between 10 and 90% by weight can. Particularly suitable for this is a waste product from aluminum production containing iron hydroxide (red mud) or water treatment (waterworks sludge). However, it can fresh iron hydroxide can also be used, which is precipitated out salt solutions of iron (III) by neutralization or from iron (II) salt solutions by neutralization and oxidation was obtained.
Die Trocknung wird zweckmäßig bei einer Temperatur im Bereich von 5 bis 150° C durchgeführt, bis das feste Material einen Restwassergehalt von weniger als 20 Gew.% besitzt.The Drying is useful for a temperature in the range of 5 to 150 ° C until the solid material has a residual water content of less than 20% by weight.
Die Zerkleinerung des festen Materials erfolgt vorzugsweise durch Aufmahlung auf Körnungen von einer Größe im Bereich zwischen 0,5 und 20 mm. Die mechanische Formgebung des halbfesten Materials findet vorzugsweise in einer Granulier- bzw. Pelletieranlage oder in einer Strangpresse statt, wobei Formkörper mit einer Größe im Bereich von 0,5 bis 20 mm erhalten werden.The The solid material is preferably comminuted by grinding on grits of a size in the range between 0.5 and 20 mm. The mechanical shape of the semi-solid Materials are preferably found in a pelletizer or in an extrusion press, with shaped bodies having a size in the range from 0.5 to 20 mm can be obtained.
Die Erfindung wird im folgenden anhand von zwei Beispielen näher erläutert.The The invention is explained in more detail below with the aid of two examples.
Beispiel 1example 1
In einem Reaktionsmischer werden 1000 g eines pastösen wasserhaltigen Eisenhydroxidschlammes mit einem Feststoffgehalt von 25 Gew.% mit 50 g einer wäßrigen Dispersion eines Vinylacetat-Ethylen-Copolymers versetzt und intensiv durchmischt. Anschließend wird das auf diese Weise erhaltene pastöse Material bei 90 bis 110° C bis zu einem Restfeuchtegehalt von weniger als 10 Gew.% getrocknet. Der nach dem beschriebenen Verfahren erhaltene Feststoff wird unter Verwendung eines Backenbrechers auf gemahlen und über eine Siebung klassiert. Das auf diese Weise erhaltene stückige Eisenhydroxid besitzt eine Körnung von 0,5 bis 2 mm und weist eine Bindekapazität beispielsweise für Phosphat-Ionen von 15 g/kg auf.In 1000 g of a pasty water-containing iron hydroxide sludge are added to a reaction mixer with a solids content of 25% by weight with 50 g of an aqueous dispersion of a vinyl acetate-ethylene copolymer and mixed thoroughly. Subsequently the pasty material obtained in this way at 90 to 110 ° C up to a residual moisture content of less than 10% by weight. The Solid obtained by the method described is under Use a jaw crusher on ground and over one Screening classified. The lumpy iron hydroxide thus obtained has a grain of 0.5 to 2 mm and has a binding capacity for example for phosphate ions from 15 g / kg.
Beispiel 2Example 2
In einem Extruder werden 5000 g eines pastösen Wasserwerksschlammes mit einem Eisengehalt von 40 Gew.% und einem Feststoffgehalt von 35 Gew.% mit 250 g einer Polymer-Dispersion auf der Basis eines Styrol-Acrylsäureester-Copolymers vermischt. Mit Hilfe einer Strangpresse werden zylinderförmige Preßlinge mit einem Durchmesser von 5 mm erhalten. Diese Preßlinge werden anschließend bei Raumtemperatur bis zu einem Restwassergehalt von 5 % getrocknet. Für die auf diese Weise hergestellten Formkörper wurden Bindekapazitäten für Phosphat von 12 mg/kg sowie für in Wasser gelöstes Zink von 1,1 g/kg ermittelt.In in an extruder, 5000 g of a pasty waterworks sludge an iron content of 40% by weight and a solids content of 35% by weight with 250 g of a polymer dispersion based on a styrene-acrylic ester copolymer mixed. With the help of an extruder, cylindrical compacts are made with obtained with a diameter of 5 mm. These compacts are then at room temperature dried to a residual water content of 5%. For those on molded articles produced in this way became binding capacities for phosphate from 12 mg / kg as well as for dissolved in water Zinc of 1.1 g / kg determined.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE1998126186 DE19826186B4 (en) | 1998-06-04 | 1998-06-04 | Process for producing an iron hydroxide and a polymer-containing adsorbent / reactant and its use |
Applications Claiming Priority (1)
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DE1998126186 DE19826186B4 (en) | 1998-06-04 | 1998-06-04 | Process for producing an iron hydroxide and a polymer-containing adsorbent / reactant and its use |
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DE19826186A1 DE19826186A1 (en) | 1999-12-09 |
DE19826186B4 true DE19826186B4 (en) | 2004-12-23 |
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DE1998126186 Expired - Lifetime DE19826186B4 (en) | 1998-06-04 | 1998-06-04 | Process for producing an iron hydroxide and a polymer-containing adsorbent / reactant and its use |
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Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2423174C (en) | 2000-09-26 | 2012-10-23 | Bayer Aktiengesellschaft | Contact and adsorber granules |
US20020074292A1 (en) | 2000-09-26 | 2002-06-20 | Andreas Schlegel | Adsorption vessels |
WO2002047811A1 (en) | 2000-12-13 | 2002-06-20 | Geh Wasserchemie Gmbh & Co.Kg | Method for producing a sorption material that contains iron |
DE20109443U1 (en) | 2001-05-30 | 2001-08-09 | ATEC Dr. Mann GmbH, 74847 Obrigheim | Device for decontaminating water containing traces of arsenic, manganese and iron |
EP1568660B1 (en) * | 2004-02-24 | 2010-12-15 | Rohm And Haas Company | Method for removal of arsenic from water |
DE102004016601A1 (en) | 2004-04-03 | 2005-10-13 | Bayer Chemicals Ag | Stable adsorber granules |
DE102006037197A1 (en) * | 2006-08-09 | 2008-02-21 | Lmbv Lausitzer Und Mitteldeutsche Bergbau-Verwaltungsgesellschaft Mbh | Production of iron hydroxide pellets for water purification, e.g. after open-cast coal mining, involves flocculation of iron hydroxide slurry, concentration, filtration, milling, addition of hygroscopic fibres and pelletisation |
JP4936453B2 (en) * | 2007-02-27 | 2012-05-23 | 日鉄鉱業株式会社 | Adsorbent for water treatment having a pH of less than 4 and containing iron ions and ions containing arsenic and method for purifying the water |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4320003A1 (en) * | 1993-06-11 | 1994-12-15 | Jekel Martin Prof Dr Ing | Process for removing dissolved arsenic by means of solid iron hydroxide in water purification |
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1998
- 1998-06-04 DE DE1998126186 patent/DE19826186B4/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4320003A1 (en) * | 1993-06-11 | 1994-12-15 | Jekel Martin Prof Dr Ing | Process for removing dissolved arsenic by means of solid iron hydroxide in water purification |
Non-Patent Citations (1)
Title |
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Derwent Abstract 87043A/48 zu JP 53-1 23 391 A * |
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DE19826186A1 (en) | 1999-12-09 |
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