DE2713963A1 - Filter membrane for esp. beverage prodn. - with sandwiched absorbent layer located between adsorbent retaining outer layers - Google Patents

Filter membrane for esp. beverage prodn. - with sandwiched absorbent layer located between adsorbent retaining outer layers

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Publication number
DE2713963A1
DE2713963A1 DE19772713963 DE2713963A DE2713963A1 DE 2713963 A1 DE2713963 A1 DE 2713963A1 DE 19772713963 DE19772713963 DE 19772713963 DE 2713963 A DE2713963 A DE 2713963A DE 2713963 A1 DE2713963 A1 DE 2713963A1
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Germany
Prior art keywords
filter membrane
adsorbent
membrane according
filter
outer layers
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DE19772713963
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German (de)
Inventor
Auf Nichtnennung Antrag
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WIELAND CARL PAUL
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WIELAND CARL PAUL
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Priority to DE19772713963 priority Critical patent/DE2713963A1/en
Publication of DE2713963A1 publication Critical patent/DE2713963A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/808—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package for immersion in the liquid to release part or all of their contents, e.g. tea bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/8043—Packages adapted to allow liquid to pass through the contents
    • B65D85/8061—Filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • 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
    • B01J20/28023—Fibres or filaments
    • 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
    • B01J20/28028—Particles immobilised within fibres or filaments
    • 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
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • 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
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • B01J20/28035—Membrane, sheet, cloth, pad, lamellar or mat with more than one layer, e.g. laminates, separated sheets
    • 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
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

A filter membrane comprises an adsorbent layer sandwiched between >=2 porous layers which prevent escape of the adsorbent particles. Pref. adsorbents are activated charcoal, Fuller's earth, a Zeolite, a molecular sieve, an adsorbent clay on a cationic or anionic exchange material. Used esp in preparing beverages. The adsorbent particles are retained.

Description

Selektive Filtermembran. Selective filter membrane.

Die Erfindung betrifft eine selektive Filtermembran, mit der es gelingt, aus Flüssigkeiten oder Gasen die gewünschten Bestandteile herauszufiltern oder in ihrer Menge zu verringern.The invention relates to a selective filter membrane with which it is possible to filter out the desired components from liquids or gases or in reduce their amount.

Es sind bereits Filtermembranen bekannt, die in einem porösen Matrixmaterial ein Adsorbens enthalten. Diese Filtermembranen leiden nun an dem Nachteil, daß das Adsorbens aus der Membran ausgeschwemmt wird und in das Filtrat übergeht, so daß nicht nur das Filtrat verunreinigt wird, sondern auch die selektive Filterwirkung der Membran verloren geht.There are already known filter membranes in a porous matrix material contain an adsorbent. These filter membranes now suffer from the disadvantage that the Adsorbent is flushed out of the membrane and passes into the filtrate, so that not only the filtrate is contaminated, but also the selective filter effect the membrane is lost.

Die Aufgabe der Erfindung besteht nun darin, eine Filtermembran mit selektiver Filterwirkung zu schaffen, in der das Adsorbens festgelegt ist, so daß es nicht aus der Schicht entfernt und in das Filtrat überführt werden kann.The object of the invention is now to provide a filter membrane with To create a selective filter effect in which the adsorbent is fixed so that it cannot be removed from the layer and transferred into the filtrate.

Diese Aufgabe wird durch die erfindungsgemäße selektive Filtermembran gelöst, die gekennzeichnet ist durch eine Adsorbensschicht mit selektiver Filterwirkung und mindestens zwei für das Adsorbens undurchlässige, poröse Außenschichten.This object is achieved by the selective filter membrane according to the invention solved, which is characterized by an adsorbent layer with a selective filter effect and at least two porous outer layers which are impermeable to the adsorbent.

Gemäß einer bevorzugten Ausführungsform der Erfindung liegt das Adsorbens in Form eines feinteiligen, vorteilhafterweise feinpulverigen oder feingranulierten Feststoffs vor, dessen mittlere Teilchengröße größer ist als die mittlere Porenweite der porösen Außenschichten.According to a preferred embodiment of the invention, the adsorbent is located in the form of a finely divided, advantageously finely powdered or finely granulated Solid, the mean particle size of which is larger than the mean pore size the porous outer layers.

In dieser Weise wird verhindert, daß das Adsorbens aus der Adsorbensschicht austreten kann. Als feste Adsorbentien sind erfindungsgemäß geeignet Aktivkohle, Fullererde, adsorbierende Tone, wie Montmorillonit-, Bentonit- oder Attapulgit-Ton, Meerschaum, Zeolithe, Molekularsiebe sowie anorganische oder organische Anionenaustauscher und/oder Kationenaustauscher.In this way, the adsorbent is prevented from coming out of the adsorbent layer can emerge. According to the invention, activated carbon is suitable as solid adsorbent, Fuller's earth, adsorbing clays such as montmorillonite, bentonite or attapulgite clay, Meerschaum, zeolites, molecular sieves and inorganic or organic anion exchangers and / or cation exchangers.

Die Adsorbensschicht der erfindungsgemäßen Filtermembran kann auch ein flüssiges Adsorbens enthalten, das auf einem inerten Trägermaterial festgelegt ist, das das Auswandern des flüssigen Adsorbens aus dieser Schicht verhindert. Vorteilhafterweise verwendet man hierzu ein festes, inertes Trägermaterial, dessen mittlere Teilchengröße größer ist als die mittlere Porenweite der porösen Außenschichten.The adsorbent layer of the filter membrane according to the invention can also contain a liquid adsorbent, which is set on an inert carrier material that prevents the liquid adsorbent from migrating out of this layer. Advantageously a solid, inert carrier material is used for this purpose, the mean particle size of which is larger than the mean pore size of the porous outer layers.

Als Trägermaterial für sowohl die feinteiligen festen als auch die flüssigen Adsorbentien kann man auch Faserschichten aus natürlichen oder synthetischen Fasern einsetzen. Man kann als Adsorbensschicht auch eine Faserschicht aus natürlichen oder synthetischen Fasern einsetzen, die chemisch derart vorbehandelt ist, daß sie saure oder basische Gruppen oder andere Gruppen mit selektiver Bindungswirkung aufweist, die die gewünschten Bestandteile aus dem zu filtrierenden Medium zurückhalten.As a carrier material for both the finely divided solid as well as the Liquid adsorbents can also be made of natural or synthetic fiber layers Fibers insert. A fiber layer can also be used as the adsorbent layer Use made of natural or synthetic fibers that have been chemically pretreated in this way is that they have acidic or basic groups or other groups with selective binding action which retain the desired constituents from the medium to be filtered.

Die porösen Außenschichten der erfindungsgemäßen Filtermembran bestehen bevorzugt aus Stoffen mit faserförmiger Struktur, insbesondere Stoffen, die aus Zellulosefasern, Synthesefasern und natürlichen Fasern, auch Asbestfasern, gebildet sind oder auch aus Filterpapier. Die Filterpapieraußenschichten können aus natürlichen und/oder synthetischen Fasern aufgebaut sein. Gemäß einer bevorzugten Ausführungsform besteht die erfindungsgemäße selektive Filtermembran aus einer in einem Arbeitsgang hergestellten dreilagigen Filterpapierschicht, in deren mittlere Schicht ein festes, feinpulveriges oder feingranuliertes Adsorbens eingelagert ist, dessen Teilchengröße so gehalten ist, daß es durch die außenliegenden Filterpapierschichten nicht austreten kann.The porous outer layers of the filter membrane according to the invention exist preferably made of materials with a fibrous structure, especially materials made of Cellulose fibers, synthetic fibers and natural fibers, including asbestos fibers are or made of filter paper. The filter paper outer layers can be made of natural and / or synthetic fibers. According to a preferred embodiment the selective filter membrane according to the invention consists of one in one operation manufactured three-ply filter paper layer, in the middle layer a solid, finely powdered or finely granulated adsorbent is incorporated, the particle size of which is held so that it does not leak through the outer layers of filter paper can.

Die Adsorbensschicht der erfindungsgemäßen Filtermembran kann einen beliebig großen Anteil des gesamten Filtermembrangewichts ausmachen, vorausgesetzt, daß die mechanische Festigkeit der Membran gewahrt ist und ein Austreten des Adsorbens aus der Adsorbensschicht verhindert wird. Vorteilhafterweise macht die Adsorbensschicht 0,5 bis 80 % und noch bevorzugter 5 bis 50 % des Gesamtgewichts der Filtermembran aus.The adsorbent layer of the filter membrane according to the invention can be a make up any large proportion of the total filter membrane weight, provided that that the mechanical strength of the membrane is preserved and leakage of the adsorbent from the adsorbent layer is prevented. The adsorbent layer advantageously makes 0.5 to 80% and more preferably 5 to 50% of the total weight of the filter membrane the end.

Die erfindungsgemäße selektive Filtermembran sei im folgenden anhand der beigefügten Zeichnung erläutert.The selective filter membrane according to the invention is based on the following the accompanying drawing.

Die einzige Figur zeigt vergrößert und schematisch einen Querschnitt durch eine bevorzugte Ausführungsform der erfindungsgemäßen Filtermembran. Wie zu erkennen ist, besteht die Filtermembran aus einer Adsorbensschicht 1 und zwei außenliegenden porösen Außenschichten 2, 3. In der Adsorbensschicht sind bei dieser Ausführungsform feinteilige Adsorbensteilchen 4 eingelagert. Die Zwischenräume 5 zwischen den Adsorbensteilchen 4 können mit einem porösen, die Adsorbensteilchen festlegenden Matrixmaterial, beispielsweise Papierfasern, ausgefüllt sein.The single figure shows enlarged and schematically a cross section by a preferred embodiment of the filter membrane according to the invention. How to can be seen, the filter membrane consists of an adsorbent layer 1 and two outer layers porous outer layers 2, 3. In the Adsorbent layer are at this Embodiment finely divided adsorbent 4 incorporated. The spaces 5 between the adsorbent 4 can with a porous, the adsorbent defining matrix material, for example paper fibers, be filled.

Bei den Adsorbensteilchen 4 kann es sich auch um Teilchen aus einem inerten Trägermaterial handeln, auf deren Oberfläche ein flüssiges oder festes Adsorbens aufgebracht ist, das fest an diesen Trägermaterialteilchen anhaftet.The adsorbent 4 can also be particles of a act inert carrier material, on the surface of a liquid or solid adsorbent is applied, which adheres firmly to these carrier material particles.

Bei der bestimmungsgemäßen Benutzung der selektiven Filtermembran dringt das zu filtrierende flüssige oder gasförmige Medium über eine der porösen Außenschichten ein, durchdringt die Adsorbensschicht und tritt über die andere Außenschicht wieder aus. Beim Hindurchlaufen durch die Adsorbensschicht hält das Adsorbens selektiv gewisse Bestandteile aus dem zu filtrierenden Medium zurück. Daher ist es erforderlich, daß das in der Filtermembran eingebaute Adsorbens an das zu filtrierende Gut angepaßt ist, da nur dann die selektive Filterwirkung erreicht werden kann. Es ist jedoch festzuhalten, daß eine Reihe von Adsorbentien, beispielsweise Aktivkohle oder Ionenaustauscher dazu geeignet sind, eine Reihe verschiedenartiger Bestandteile aus dem zu filtrierenden Medium zu entfernen.When using the selective filter membrane as intended the liquid or gaseous medium to be filtered penetrates through one of the porous ones Outer layers, penetrates the adsorbent layer and passes over the other outer layer out again. As it passes through the adsorbent layer, the adsorbent holds selectively certain components from the medium to be filtered back. Therefore it is necessary that the adsorbent built into the filter membrane is adapted to the material to be filtered is because only then can the selective filter effect be achieved. However, it is It should be noted that a number of adsorbents, such as activated carbon or ion exchangers are suitable for a number of different components from the to be filtered Remove the medium.

Die erfindungsgemäße Filtermembran kann mit Hilfe üblicher Verfahrensweisen hergestellt werden, indem man beispielsweise die Adsorbensschicht zwischen zwei vorgefertigte poröse Außenschichten einbringt. Dabei kann man als Adsorbensschicht chemisch behandelte Faserschichten oder Faserschichten, in die das feste, feinpulverige oder feingranulierte Adsorbens eingelagert worden ist, verwenden. So kann man beispielsweise einem Papierbrei das feste oder flüssige Adsorbens zusetzen und diesen Papierbrei zu einem Filterpapier ausformen, das dann mit den porösen Außenschichten versehen wird.The filter membrane according to the invention can be carried out using conventional procedures be made by, for example, the adsorbent layer between two introduces prefabricated porous outer layers. It can be used as an adsorbent layer chemically treated fiber layers or fiber layers into which the solid, finely powdered or finely granulated adsorbent has been stored. So you can, for example add the solid or liquid adsorbent to a paper pulp and this paper pulp shape into a filter paper, then with the porous outer layers is provided.

Es ist jedoch auch möglich, gemäß einer bevorzugten Ausführungsform die erfindungsgemäße selektive Filtermembran in einem Arbeitsgang herzustellen, indem beispielsweise die Adsorbensschicht zwischen zwei oder mehrere Papierschichten eingebracht wird.However, it is also possible according to a preferred embodiment to produce the selective filter membrane according to the invention in one operation, for example by placing the adsorbent layer between two or more paper layers is introduced.

Die erfindungsgemäße selektive Filtermembran unterscheidet sich in vorteilhafter Weise von den herkömmlichen Produkten dadurch, daß sie das Adsorbens in einer Adsorbensschicht festlegt, so daß weder das filtrierte Gut durch das Adsorbens verunreinigt wird noch die Adsorptionswirkung der Filtermembran verloren geht.The selective filter membrane according to the invention differs in advantageous from the conventional products in that they contain the adsorbent sets in an adsorbent layer, so that neither the filtered material through the adsorbent if it becomes contaminated, the adsorption effect of the filter membrane is lost.

Es ist natürlich ohne weiteres möglich, die erfindungsgemäße selektive Filtermembran einem Rückspülvorgang zu unterwerfen, wenn die Adsorptionskapazität der Adsorbensschicht erschöpft ist. So kann man beispielsweise die als Adsorbens vorhandenen Ionenaustauscher in üblicher Weise wieder regenerieren.It is of course easily possible to use the selective Subject the filter membrane to a backwash process when the adsorption capacity the adsorbent layer is exhausted. So you can, for example, as an adsorbent regenerate existing ion exchangers in the usual way.

Die erfindungsgemäße selektive Filtermembran kann in üblicher Weise verwendet werden, beispielsweise in Filterrahmen oder als Filterpapier, das in geeignete Filtertrichter eingelegt wird oder kann in besonders vorteilhafter Weise in Beutelform eingesetzt werden.The selective filter membrane according to the invention can be used in the usual way can be used, for example in filter frames or as filter paper that is in suitable Filter funnel is inserted or can be in a particularly advantageous manner in the form of a bag can be used.

Diese Anwendungsform bietet sich insbesondere für Tee-oder Kaffee-Filterbeutel an, daß es in dieser Weise gelingt, unerwünschte Inhaltsstoffe beim Aufbrühen bzw. Kochen des Kaffees oder des Tees in der Filtermembran zurückzuhalten. Die erfindungsgemäße Filtermembran kann ferner zum Entchloren von Trinkwasser, zum Entkeimen von Trinkwasser, zum Herstellen von Heilwässern aus normalem Leitungswasser und zur Bereitung von Getränken eingesetzt werden, wobei im letzteren Fall beim Passieren des Filters auch eine Anreicherung des Getränks mit Kohlendioxid möglich ist.This form of application is particularly suitable for tea or coffee filter bags indicates that it is possible in this way to remove unwanted ingredients when brewing or To retain the boiling of the coffee or tea in the filter membrane. The inventive Filter membrane can also be used for dechlorinating drinking water, for disinfecting drinking water, for the production of medicinal waters from normal tap water and for the preparation of Drinks are used, in the latter case when passing of Filter also an enrichment of the drink with carbon dioxide is possible.

Die erfindungsgemäße Filtermembran hat sich für Kaffeefilteraufgußbeutel als besonders geeignet erwiesen, insbesondere wenn die Adsorbensschicht mit geschmacksneutralen und indifferenten Stoffen, wie Carboxymethylcellulose oder Pektinen beschichtet bzw. imprägniert ist.The filter membrane according to the invention has been used for coffee filter infusion bags Proven to be particularly suitable, especially when the adsorbent layer is tasteless and inert substances such as carboxymethyl cellulose or pectins or is impregnated.

Gegenstand der Erfindung ist daher auch die Verwendung der erfindungsgemäßen selektiven Filtermembran für die Herstellung von Kaffeefilteraufgußbeuteln.The invention therefore also relates to the use of the invention selective filter membrane for the production of coffee filter bags.

Die Herstellung des mehrschichtigen Filters erfolgt bevorzugt auf einem Vertikaldoppelblattbildner, dessen beide Siebe V-förmig zusammenlaufen, wobei zur Niederschlagung der Außenfolien aus der Suspension unter den Sieben Entwässerungsvorrichtungen angeordnet sind. Zwischen den so sich bildenden Außenfolien wird eine Suspension von selektiven Adsorbentien eingebracht. Nach Durchlaufen einer weiteren Entwässerungszone werden die Siebe parallel in einem Abstand weitergeführt, der die Verbindung der Außenfolien mit der dazwischen eingebetteten aktiven Schicht bewirkt. Eine derartige Anlage ist in der österreichische Patentanmeldung Nr. 29571 beschrieben.The multilayer filter is preferably manufactured on a vertical double sheet former, the two wires of which converge in a V-shape, whereby for the precipitation of the outer films from the suspension under the sieve dewatering devices are arranged. A suspension is created between the outer foils thus formed introduced by selective adsorbents. After passing through another drainage zone the sieves are continued in parallel at a distance that connects the Causes outer foils with the active layer embedded in between. Such a one The system is described in Austrian patent application No. 29571.

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Claims (13)

Patentansprüche 1. Selektive Filtermembran, g e k e n n z e i c h -n e t d u r c h eine Adsorbensschicht (1) mit selektiver Filterwirkung und mindestens zwei für das Adsorbens undurchlässige, poröse Außenschichten (2, 3). Claims 1. Selective filter membrane, g e k e n n n z e i c h -n e t d u r c h an adsorbent layer (1) with a selective filter effect and at least two porous outer layers impermeable to the adsorbent (2, 3). 2. Filtermembran nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß das Adsorbens in Form eines feinteiligen Feststoffs (4) vorliegt, dessen mittlere Teilchengröße größer ist als die mittlere Porenweite der porösen Außenschichten.2. Filter membrane according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the adsorbent is in the form of a finely divided solid (4), whose mean particle size is larger than the mean pore size of the porous Outer layers. 3. Filtermembran nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t, daß das Adsorbens in feinpulveriger oder feingranulierter Form vorliegt.3. Filter membrane according to claim 2, d a d u r c h g e k e n n z e i c h n e t that the adsorbent is in finely powdered or finely granulated form. 4. Filtermembran nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t, daß die Adsorbensschicht Aktivkohle, Fullererde, adsorbierende Tone, Meerschaum, Zeolithe, Molekularsiebe und anorganische oder organische Anionenaustauscher und/oder Kationenaustauscher enthält.4. Filter membrane according to claim 2, d a d u r c h g e k e n n z e i c h n e t that the adsorbent layer activated carbon, fuller's earth, adsorbent clays, Meerschaum, zeolites, molecular sieves and inorganic or organic anion exchangers and / or cation exchangers. 5. Filtermembran nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß das Adsorbens in Form eines auf einem inerten, feinteiligen Trägermaterial festgelegten flüssigen Adsorbens vorliegt, wobei die mittlere Teilchengröße des Trägermaterials größer ist als die mittlere Porenweite der porösen Außenschichten.5. Filter membrane according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the adsorbent is in the form of an inert, finely divided carrier material specified liquid adsorbent is present, the mean particle size of the The carrier material is larger than the mean pore size of the porous outer layers. 6. Filtermembran nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Adsorbensschicht aus einer chemisch vorbehandelten Faserschicht aus natürlichen und/oder synthetischen Fasern mit selektivem Rückhaltevermögen besteht. 6. Filter membrane according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the adsorbent layer consists of a chemically pretreated fiber layer consists of natural and / or synthetic fibers with selective retention. 7. Filtermembran nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t, daß die Faserschicht saure oder basische Gruppen oder andere Gruppen mit selektiver Bindungswirkung aufweist. 7. Filter membrane according to claim 6, d a d u r c h g e k e n n z e i c h n e t that the fiber layer has acidic or basic groups or other groups having a selective binding effect. 8. Filtermembran nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t, daß die Adsorbensschicht aus einem in einem Fasersubstrat festgelegten festen Adsorbens besteht. 8. Filter membrane according to claim 2, d a d u r c h g e k e n n z e i c h n e t that the adsorbent layer consists of a fixed in a fiber substrate solid adsorbent. 9. Filtermembran nach einem der vorhergehenden Patentansprüche, d a d u r c h g e k e n n -z e i c h n e t, daß die porösen Außenschichten aus Kunststoff, Keramik, Sintermetall oder Filterpapier bestehen. 9. Filter membrane according to one of the preceding claims, d a d u r c h g e k e n n -z e i c h n e t that the porous outer layers of plastic, Ceramic, sintered metal or filter paper are made. 10. Filtermembran nach Anspruch 9, d a d u r c h g e k e n n z e i c h n e t, daß das Papier der Filterpapieraußenschichten aus natürlichen und/oder synthetischen Fasern aufgebaut ist.10. Filter membrane according to claim 9, d a d u r c h g e k e n n z e i c h n e t that the paper of the filter paper outer layers are made of natural and / or synthetic fibers. 11. Filtermembran nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h -n e t, daß die Adsorbensschicht 0,5 bis 80 Gew.-% des Gesamtgewichts der Filtermembran ausmacht.11. Filter membrane according to one of the preceding claims, d a d u It is noted that the adsorbent layer is 0.5 to 80% by weight of the The total weight of the filter membrane. 12. Filtermembran nach Anspruch 11, d a d u r c h g e k e n n z e i c h n e t, daß die Adsorbensschicht 5 bis 50 Gew.-% des Gesamtgewichts der Filtermembran ausmacht.12. Filter membrane according to claim 11, d a d u r c h g e k e n n z e i c h n e t that the adsorbent layer is 5 to 50 wt .-% of the total weight of the filter membrane matters. 13. Verwendung der selektiven Filtermembran gemäß einem der vorhergehenden Ansprüche zur Herstellung von Kaffeefilter-Kochbeuteln.13. Use of the selective filter membrane according to one of the preceding Claims for the production of coffee filter bags.
DE19772713963 1977-03-29 1977-03-29 Filter membrane for esp. beverage prodn. - with sandwiched absorbent layer located between adsorbent retaining outer layers Withdrawn DE2713963A1 (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482867A1 (en) * 1980-05-23 1981-11-27 Kureha Chemical Ind Co Ltd MEMBRANE FOR THE REGENERATION OF OILS
FR2491780A1 (en) * 1980-10-13 1982-04-16 Giffard L Nonwoven fabrics charged with powdered material - mixed with hackled wastes from chemically-bonded nonwovens
US4504289A (en) * 1983-07-15 1985-03-12 Des-Case Corporation Hygroscopic breather cap
DE4028357A1 (en) * 1989-09-06 1991-03-07 Sartorius Gmbh Adsorptive sepn. using microporous adsorbent - esp. travelling strip through which medium flows, useful for immuno:complex formation
WO1992001226A1 (en) * 1990-07-05 1992-01-23 Unilever Plc Analytical test device for specific binding assays
WO1996037293A1 (en) * 1995-05-24 1996-11-28 Kimberly-Clark Worldwide, Inc. Compressed adsorbent filter cake
US5603830A (en) * 1995-05-24 1997-02-18 Kimberly-Clark Corporation Caffeine adsorbent liquid filter with integrated adsorbent
USD383036S (en) 1995-11-16 1997-09-02 Kimberly-Clark Corporation Filter cake holder
EP0809529A1 (en) * 1995-02-17 1997-12-03 Lydall, Inc. Filter material for preparing a beverage
US5728634A (en) * 1995-05-24 1998-03-17 Kimberly Clark Corporation Caffeine adsorbent liquid filter
US5906743A (en) * 1995-05-24 1999-05-25 Kimberly Clark Worldwide, Inc. Filter with zeolitic adsorbent attached to individual exposed surfaces of an electret-treated fibrous matrix
WO2001010535A2 (en) * 1999-08-06 2001-02-15 Mhb Filtration Gmbh & Co. Kg Filtering material for separating fluids from solid, particulate and gaseous constituents
CN116040731A (en) * 2023-01-31 2023-05-02 广东名桂环保有限公司 Composite water treatment agent and preparation method thereof

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482867A1 (en) * 1980-05-23 1981-11-27 Kureha Chemical Ind Co Ltd MEMBRANE FOR THE REGENERATION OF OILS
FR2491780A1 (en) * 1980-10-13 1982-04-16 Giffard L Nonwoven fabrics charged with powdered material - mixed with hackled wastes from chemically-bonded nonwovens
US4504289A (en) * 1983-07-15 1985-03-12 Des-Case Corporation Hygroscopic breather cap
DE4028357A1 (en) * 1989-09-06 1991-03-07 Sartorius Gmbh Adsorptive sepn. using microporous adsorbent - esp. travelling strip through which medium flows, useful for immuno:complex formation
DE4028357C2 (en) * 1989-09-06 1999-10-07 Sartorius Gmbh Method and device for adsorptive material separation
WO1992001226A1 (en) * 1990-07-05 1992-01-23 Unilever Plc Analytical test device for specific binding assays
EP0809529A1 (en) * 1995-02-17 1997-12-03 Lydall, Inc. Filter material for preparing a beverage
EP0809529A4 (en) * 1995-02-17 1998-08-12 Lydall Inc Filter material for preparing a beverage
US5906743A (en) * 1995-05-24 1999-05-25 Kimberly Clark Worldwide, Inc. Filter with zeolitic adsorbent attached to individual exposed surfaces of an electret-treated fibrous matrix
US5728634A (en) * 1995-05-24 1998-03-17 Kimberly Clark Corporation Caffeine adsorbent liquid filter
US5614096A (en) * 1995-05-24 1997-03-25 Kimberly-Clark Corporation Compressed adsorbent filter cake
US5603830A (en) * 1995-05-24 1997-02-18 Kimberly-Clark Corporation Caffeine adsorbent liquid filter with integrated adsorbent
WO1996037293A1 (en) * 1995-05-24 1996-11-28 Kimberly-Clark Worldwide, Inc. Compressed adsorbent filter cake
USD383036S (en) 1995-11-16 1997-09-02 Kimberly-Clark Corporation Filter cake holder
WO2001010535A2 (en) * 1999-08-06 2001-02-15 Mhb Filtration Gmbh & Co. Kg Filtering material for separating fluids from solid, particulate and gaseous constituents
WO2001010535A3 (en) * 1999-08-06 2001-05-17 Mhb Filtration Gmbh & Co Kg Filtering material for separating fluids from solid, particulate and gaseous constituents
CN116040731A (en) * 2023-01-31 2023-05-02 广东名桂环保有限公司 Composite water treatment agent and preparation method thereof
CN116040731B (en) * 2023-01-31 2023-11-10 广东名桂环保有限公司 Composite water treatment agent and preparation method thereof

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