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EP0659355A2 - Filter for eliminating nitrogen oxides from tobacco smoke - Google Patents

Filter for eliminating nitrogen oxides from tobacco smoke Download PDF

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Publication number
EP0659355A2
EP0659355A2 EP94119946A EP94119946A EP0659355A2 EP 0659355 A2 EP0659355 A2 EP 0659355A2 EP 94119946 A EP94119946 A EP 94119946A EP 94119946 A EP94119946 A EP 94119946A EP 0659355 A2 EP0659355 A2 EP 0659355A2
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EP
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Prior art keywords
filter
filter according
component
nitrogen oxides
tobacco smoke
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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.)
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EP94119946A
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German (de)
French (fr)
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EP0659355A3 (en
Inventor
Erich Dr. Blöcker
Andreas Dr. Schleicher
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Hoechst AG
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Hoechst AG
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent

Definitions

  • the present invention relates to a filter for removing nitrogen oxides from tobacco smoke.
  • Tobacco smoke is the aerosol that arises when the tobacco is burned and is known to contain a very large number - several thousand are expected - of chemical compounds.
  • the gas phase of tobacco smoke is relatively simple in composition and contains, in addition to the known air components, carbon monoxide, hydrogen, hydrogen cyanide, ammonia, nitrogen oxides and traces of hydrogen sulfide and organic compounds (Römpp Chemie Lexikon, 9th edition, volume 6 (1992), p. 4435).
  • the best-known and physiologically relevant components are the alkaloid nicotine and the gaseous toxins such as carbon monoxide, nitrogen oxides (NO x ) and hydrocyanic acid, as well as the tar components, acrolein and tobacco-specific nitrosamines.
  • the gaseous toxins such as carbon monoxide, nitrogen oxides (NO x ) and hydrocyanic acid, as well as the tar components, acrolein and tobacco-specific nitrosamines.
  • the filters used for this purpose contain adsorptive materials of preferably fibrous or highly porous structure, for example Cellulose fibers (crepe paper filters), cellulose acetate fibers, polypropylene fibers, aluminum oxide, silica gel, meerschaum or activated carbon.
  • adsorptive materials preferably fibrous or highly porous structure, for example Cellulose fibers (crepe paper filters), cellulose acetate fibers, polypropylene fibers, aluminum oxide, silica gel, meerschaum or activated carbon.
  • Activated carbon filters selectively adsorb up to 85% of the gas / vapor phase components, depending on the available inner surface, but almost no particle phase at all. Fiber and powder filters (except activated carbon) prefer to hold the particle phase, i.e. the tar components, back and therefore have a particularly striking effect on the taste of tobacco smoke.
  • Tobacco smoke contains 0.02% of the gas phase nitrogen oxides. Prolonged exposure to nitrogen oxides, which are irritating to the respiratory tract and mucous membranes, can lead to bronchitis and edema (Römpp Chemie Lexikon, 9th edition, volume 5 (1992), p. 4316) to remove tobacco smoke as effectively as possible using special filter compositions.
  • a partial adsorption of nitrogen monoxide and carbon monoxide was achieved by transition metal complexes with oxime ligands on an inert granulate (GB-PS 2 150 806). Furthermore, a tobacco smoke filter for nitrogen monoxide was described, which was obtained by impregnating cellulose or cellulose acetate fibers with a complex of iron (II) ion and low molecular weight thiol (EP-A 351 252). Both methods take advantage of the possibility of the NO molecule for the easy formation of addition complexes with suitable transition metal compounds.
  • Partial removal of nitrogen dioxide from the tobacco smoke was achieved by impregnating a non-oxidizable, particulate adsorbent with a high surface area or high pore volume with a permanganate salt (US Pat. No. 3,434,479).
  • a method for the selective removal of toxic components such as HCN and NO from cigarette smoke is also known.
  • Conventional cigarette filter material applied inorganic or organic substances that remove the toxic compounds during the smoking process (DE-C 37 12 836).
  • Nitrogen oxides in particular nitrogen dioxide, can be removed virtually completely from gases and liquids by polyarylene thioethers (German patent application P 43 28 450.7 from August 24, 1993, title "Filter material and process for removing nitrogen oxides from gases and liquids").
  • the object of the invention is to provide a tobacco smoke filter that can remove nitrogen oxides (NO x ) practically quantitatively and is easy to manufacture.
  • Component B) can be made from cellulose, cellulose acetate and / or polyolefins, e.g. Polypropylene exist.
  • adsorptive materials can be used to remove gaseous smoke components and / or aerosol particles contained in the smoke. Examples include aluminum oxide, silica gel, meerschaum and activated carbon.
  • Polyphenylene sulfide (PPS) with the repeating unit of the formula (II) is preferred: used as polyarylene thioether.
  • the PPS of the formula (II) can also have a 1,2- and / or 1,3-linkage on the aromatic nucleus up to a proportion of 50 mol%.
  • PPS means both the linear and the cross-linked material.
  • polyarylene thioethers are suitable which have an average molecular weight of 4,000 to 200,000, preferably 10,000 to 150,000, in particular 25,000 to 100,000, determined by GPC.
  • Powders A) used in the filter according to the invention have commercially available particle sizes, ie their average particle size is generally up to 300 ⁇ m, preferably 20 to 100 ⁇ m.
  • the polymers of component A) are used in the form of fibers for the manufacture of the tobacco smoke filter, these can be, for example, as continuous fibers (filaments) or staple fibers, preferably with staple lengths of 0.5 to 50 mm, or as split fibers or split-film fibers , but also as a "non woven" material, card sliver or fabric.
  • the polyarylene thioethers A) can also be used in the form of films or film snippets in a suitable form Find tobacco smoke filters. It is important that the tobacco smoke can be passed through without disturbance or noticeable pressure drop.
  • the removal of nitrogen dioxide from the tobacco smoke is generally carried out quantitatively by the polymer A).
  • nitrogen monoxide is only removed to a small extent.
  • oxidative compounds i.e.
  • at least one inorganic or organic compound with an oxidative effect which has an electron potential greater than or equal to 0.96 V, such as vanadium pentoxide or dichlorodicyanoquinone, is also separated here almost quantitatively.
  • the filter according to the invention can be used, for example, in the manufacture of filter cigarettes and can be incorporated into the known filter structures.
  • the filter can also be used for pipes, cigarette holders and cigar holders, for example in the form of filter cartridges.
  • the content of polyarylene thioether A) can be up to 50% by weight of the total weight of the filter in order to ensure safe removal of the nitrogen oxides, but preferably at least 5% by weight.
  • polyarylene thioether A is used in the form of fibers in tobacco smoke filters according to the invention, these can either be located in a separate spatial section of the filter or can be used in a mixture with the customary fiber materials used for the smoke filters.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Treating Waste Gases (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

A filter for removing nitrogen oxides (NOx) from tobacco smoke comprises A) a poly(arylene thioether), B) if appropriate a conventional filter material, and C) if appropriate at least one surface-active solid. Use of this filter removes, in particular, nitrogen dioxide virtually completely from the smoke.

Description

Die vorliegende Erfindung betrifft ein Filter zur Entfernung von Stickoxiden aus Tabakrauch.The present invention relates to a filter for removing nitrogen oxides from tobacco smoke.

Tabakrauch ist das beim Abbrand des Tabaks entstehende Aerosol und enthält bekannterweise eine sehr große Anzahl - man rechnet mit mehreren tausend - an chemischen Verbindungen. Die Gasphase des Tabakrauchs ist relativ einfach zusammengesetzt und enthält neben den bekannten Luftbestandteilen Kohlenmonoxid, Wasserstoff, Cyanwasserstoff, Ammoniak, Stickoxide und Spuren von Schwefelwasserstoff und organischen Verbindungen (Römpp Chemie Lexikon, 9. Auflage, Band 6 (1992), S. 4435).Tobacco smoke is the aerosol that arises when the tobacco is burned and is known to contain a very large number - several thousand are expected - of chemical compounds. The gas phase of tobacco smoke is relatively simple in composition and contains, in addition to the known air components, carbon monoxide, hydrogen, hydrogen cyanide, ammonia, nitrogen oxides and traces of hydrogen sulfide and organic compounds (Römpp Chemie Lexikon, 9th edition, volume 6 (1992), p. 4435).

Neben den charakteristischen Geschmacksstoffen sind die bekanntesten und physiologisch relevantesten Bestandteile das Alkaloid Nicotin und die gasförmigen Giftstoffe wie Kohlenmonoxid, Stickoxide (NOx) und Blausäure, sowie die Teerbestandteile, Acrolein und tabakspezifische Nitrosamine.In addition to the characteristic flavors, the best-known and physiologically relevant components are the alkaloid nicotine and the gaseous toxins such as carbon monoxide, nitrogen oxides (NO x ) and hydrocyanic acid, as well as the tar components, acrolein and tobacco-specific nitrosamines.

Es ist daher seit langem versucht worden, die Zusammensetzung des Tabakrauches durch Filterpassage so zu beeinflussen, daß besonders giftige, sofort- oder langzeitwirkende Bestandteile entfernt werden, ohne den Geschmack des Rauches und seine vom Raucher gewünschte physiologische Wirkung allzusehr zu beeinträchtigen. Das Hauptaugenmerk wurde dabei auf die Entfernung bestimmter gasförmiger Inhaltsstoffe und der Teerbestandteile des Rauches, weniger auf die Herabsetzung des Nicotingehaltes, gelegt.It has therefore been attempted for a long time to influence the composition of the tobacco smoke by filter passage in such a way that particularly toxic, immediate or long-term components are removed without impairing the taste of the smoke and its physiological effect desired by the smoker. The main focus was on the removal of certain gaseous ingredients and the tar components of the smoke, less on the reduction of the nicotine content.

Die zu diesem Zweck eingesetzten Filter enthalten adsorptiv wirkende Materialien von vorzugsweise faseriger oder hochporöser Struktur, z.B. Cellulosefasern (Kreppapierfilter), Celluloseacetatfasern, Polypropylenfasern, Aluminiumoxid, Kieselgel, Meerschaum oder Aktivkohle.The filters used for this purpose contain adsorptive materials of preferably fibrous or highly porous structure, for example Cellulose fibers (crepe paper filters), cellulose acetate fibers, polypropylene fibers, aluminum oxide, silica gel, meerschaum or activated carbon.

Aktivkohlefilter adsorbieren selektiv je nach verfügbarer innerer Oberfläche bis zu 85 % der Gas/Dampfphasenbestandteile, dagegen so gut wie gar keine Partikelphase. Faser- und Pulver-Filter (außer Aktivkohle) halten dagegen bevorzugt die Partikelphase, d.h. die Teerbestandteile, zurück und haben daher besonders auffällige Auswirkungen auf den Geschmack des Tabakrauches.Activated carbon filters selectively adsorb up to 85% of the gas / vapor phase components, depending on the available inner surface, but almost no particle phase at all. Fiber and powder filters (except activated carbon) prefer to hold the particle phase, i.e. the tar components, back and therefore have a particularly striking effect on the taste of tobacco smoke.

Im Tabakrauch sind zu 0,02 % der Gasphase Stickstoffoxide enthalten. Eine längerdauernde Einwirkung der die Atemwege und Schleimhäute reizenden Stickoxide kann zu Bronchitiden und Ödemen führen (Römpp Chemie Lexikon, 9. Auflage, Band 5 (1992], S. 4316). Es ist deshalb wünschenswert und schon seit längerem versucht worden, auch Stickoxide aus dem Tabakrauch durch spezielle Filterzusammensetzungen möglichst wirkungsvoll zu entfernen.Tobacco smoke contains 0.02% of the gas phase nitrogen oxides. Prolonged exposure to nitrogen oxides, which are irritating to the respiratory tract and mucous membranes, can lead to bronchitis and edema (Römpp Chemie Lexikon, 9th edition, volume 5 (1992), p. 4316) to remove tobacco smoke as effectively as possible using special filter compositions.

Eine teilweise Adsorption von Stickstoffmonoxid und Kohlenmonoxid wurde durch Übergangsmetallkomplexe mit Oximliganden auf einem inerten Granulat erreicht (GB-PS 2 150 806). Desweiteren wurde ein Tabakrauchfilter für Stickstoffmonoxid beschrieben, das durch Imprägnierung von Cellulose- oder Celluloseacetat-Fasern mit einem Komplex aus Eisen(II)-ion und niedrigmolekularem Thiol erhalten wurde (EP-A 351 252). Beide Methoden nutzen die Möglichkeit des NO-Moleküls zur leichten Bildung von Additionskomplexen mit geeigneten Übergangsmetall-Verbindungen.A partial adsorption of nitrogen monoxide and carbon monoxide was achieved by transition metal complexes with oxime ligands on an inert granulate (GB-PS 2 150 806). Furthermore, a tobacco smoke filter for nitrogen monoxide was described, which was obtained by impregnating cellulose or cellulose acetate fibers with a complex of iron (II) ion and low molecular weight thiol (EP-A 351 252). Both methods take advantage of the possibility of the NO molecule for the easy formation of addition complexes with suitable transition metal compounds.

Eine teilweise Entfernung von Stickstoffdioxid aus dem Tabakrauch wurde erreicht durch Imprägnierung eines nicht-oxidierbaren, partikelförmigen Adsorptionsmittels mit hoher Oberfläche bzw. hohem Porenvolumen mit einem Permanganatsalz (US-PS 3,434,479).Partial removal of nitrogen dioxide from the tobacco smoke was achieved by impregnating a non-oxidizable, particulate adsorbent with a high surface area or high pore volume with a permanganate salt (US Pat. No. 3,434,479).

Bekannt ist ferner ein Verfahren zur selektiven Entfernung von toxischen Komponenten wie HCN und NO aus Zigarettenrauch. Hierbei werden auf herkömmliches Zigarettenfiltermaterial anorganische oder organische Substanzen aufgebracht, die während des Rauchvorganges die toxischen Verbindungen entfernen (DE-C 37 12 836).A method for the selective removal of toxic components such as HCN and NO from cigarette smoke is also known. Here are on Conventional cigarette filter material applied inorganic or organic substances that remove the toxic compounds during the smoking process (DE-C 37 12 836).

Stickoxide, insbesondere Stickstoffdioxid, können praktisch vollständig aus Gasen und Flüssigkeiten durch Polyarylenthioether entfernt werden (Deutsche Patentanmeldung P 43 28 450.7 vom 24. August 1993, Titel "Filtermaterial und Verfahren zur Entfernung von Stickoxiden aus Gasen und Flüssigkeiten").Nitrogen oxides, in particular nitrogen dioxide, can be removed virtually completely from gases and liquids by polyarylene thioethers (German patent application P 43 28 450.7 from August 24, 1993, title "Filter material and process for removing nitrogen oxides from gases and liquids").

Aufgabe der Erfindung ist es, ein Tabakrauch-Filter zur Verfügung zu stellen, das Stickoxide (NOx) praktisch quantitativ entfernen kann und einfach herzustellen ist.The object of the invention is to provide a tobacco smoke filter that can remove nitrogen oxides (NO x ) practically quantitatively and is easy to manufacture.

Die Erfindung betrifft ein Filter zur Entfernung von Stickoxiden (NOx) aus Tabakrauch, insbesondere von Stickstoffdioxid, bestehend aus

  • A) einem Polyarylenthioether mit wiederkehrenden Einheiten der Formel



            -[(Ar¹ )n-X]m-[(Ar²)i-Y]j-[(Ar³)k-Z]l-[(Ar⁴)o-W]p-   (I)



    in Form von Fasern, Filmen und/oder Pulver, wobei Ar¹, Ar², Ar³, Ar⁴, W, X, Y und Z unabhängig voneinander gleich oder verschieden sind, die Indizes n, m, i, j, k, l, o und p unabhängig voneinander Null oder ganze Zahlen 1,2,3 oder 4 sind, wobei ihre Summe mindestens 2 ist, Ar¹, Ar², Ar³ und Ar⁴ Arylensysteme mit 6 bis 18 C-Atomen sind und W, X, Y und Z zweiwertige Verknüpfungsgruppen darstellen, ausgewählt aus -S-, -SO-, -SO₂-,-O-, -CO-, -CO₂- oder Alkylen- oder Alkylidengruppen mit 1 bis 6 C-Atomen,
  • B) gegebenenfalls einem herkömmlichen Filtermaterial und
  • C) gegebenenfalls mindestens einem oberflächenaktiven Festkörper.
The invention relates to a filter for removing nitrogen oxides (NO x ) from tobacco smoke, in particular nitrogen dioxide, consisting of
  • A) a polyarylene thioether with repeating units of the formula



    - [(Ar¹) n -X] m - [(Ar²) i -Y] j - [(Ar³) k -Z] l - [(Ar⁴) o -W] p - (I)



    in the form of fibers, films and / or powder, where Ar¹, Ar², Ar³, Ar⁴, W, X, Y and Z are independently the same or different, the indices n, m, i, j, k, l, o and p independently of one another are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar¹, Ar², Ar³ and Ar⁴ are arylene systems with 6 to 18 C atoms and W, X, Y and Z represent divalent linking groups , selected from -S-, -SO-, -SO₂ -, - O-, -CO-, -CO₂- or alkylene or alkylidene groups with 1 to 6 C atoms,
  • B) optionally a conventional filter material and
  • C) optionally at least one surface-active solid.

Die Komponente B) kann aus Cellulose, Celluloseacetat und/oder Polyolefinen, z.B. Polypropylen bestehen. Als Komponente C) können adsorptiv wirkende Materialien zur Entfernung von gasförmigen Rauchbestandteilen und/oder im Rauch enthaltenen Aerosol-Partikeln eingesetzt werden. Beispiele hierfür sind Aluminiumoxid, Kieselgel, Meerschaum und Aktivkohle.Component B) can be made from cellulose, cellulose acetate and / or polyolefins, e.g. Polypropylene exist. As component C), adsorptive materials can be used to remove gaseous smoke components and / or aerosol particles contained in the smoke. Examples include aluminum oxide, silica gel, meerschaum and activated carbon.

Bevorzugt wird Polyphenylensulfid (PPS) mit der wiederkehrenden Einheit der Formel (II):

Figure imgb0001

als Polyarylenthioether eingesetzt.Polyphenylene sulfide (PPS) with the repeating unit of the formula (II) is preferred:
Figure imgb0001
used as polyarylene thioether.

Das PPS der Formel (II) kann auch bis zu einem Anteil von 50 Mol-% eine 1,2- und/oder 1,3-Verknüpfung am aromatischen Kern aufweisen. Unter "PPS" ist sowohl das lineare als auch das vernetzte Material zu verstehen.The PPS of the formula (II) can also have a 1,2- and / or 1,3-linkage on the aromatic nucleus up to a proportion of 50 mol%. "PPS" means both the linear and the cross-linked material.

Im allgemeinen sind Polyarylenthioether geeignet, die ein mittleres Molekulargewicht von 4 000 bis 200 000, vorzugsweise von 10 000 bis 150 000, insbesondere von 25 000 bis 100 000, bestimmt durch GPC, aufweisen.In general, polyarylene thioethers are suitable which have an average molecular weight of 4,000 to 200,000, preferably 10,000 to 150,000, in particular 25,000 to 100,000, determined by GPC.

Im Filter gemäß der Erfindung eingesetzte Pulver A) besitzen handelsübliche Teilchengrößen, d.h. ihre mittlere Teilchengröße beträgt im allgemeinen bis 300 µm, vorzugsweise 20 bis 100 µm. Werden für die Herstellung des Tabakrauchfilters die Polymere der Komponente A) in der Form von Fasern verwendet, können diese beispielsweise als Endlosfasern (Filamente) oder Stapelfasern, vorzugsweise mit Stapellängen von 0,5 bis 50 mm, oder als Spaltfasern oder Split-Film-Fasern, aber auch als "non woven" Material, Kardenband oder Gewebe eingesetzt werden. Die Polyarylenthioether A) können aber auch als Folien oder Folienschnipsel in geeigneter Form in den Tabakrauchfiltern Verwendung finden. Wichtig ist, daß der Tabakrauch ohne Störung bzw. merkbarem Druckabfall durchgeleitet werden kann.Powders A) used in the filter according to the invention have commercially available particle sizes, ie their average particle size is generally up to 300 μm, preferably 20 to 100 μm. If the polymers of component A) are used in the form of fibers for the manufacture of the tobacco smoke filter, these can be, for example, as continuous fibers (filaments) or staple fibers, preferably with staple lengths of 0.5 to 50 mm, or as split fibers or split-film fibers , but also as a "non woven" material, card sliver or fabric. The polyarylene thioethers A) can also be used in the form of films or film snippets in a suitable form Find tobacco smoke filters. It is important that the tobacco smoke can be passed through without disturbance or noticeable pressure drop.

Die Entfernung von Stickstoffdioxid aus dem Tabakrauch erfolgt im allgemeinen quantitativ durch das Polymer A). Im Gegensatz zum Stickstoffdioxid wird aber Stickstoffmonoxid nur in geringem Umfang entfernt. Durch die Zugabe von oxidativ wirkenden Verbindungen, d.h. mindestens einer oxidativ wirkenden anorganischen oder organischen Verbindung, die ein Elektronenpotential von größer gleich 0,96 V aufweist, wie Vanadinpentoxid oder Dichlordicyanochinon, erfolgt aber die Abtrennung auch hier nahezu quantitativ.The removal of nitrogen dioxide from the tobacco smoke is generally carried out quantitatively by the polymer A). In contrast to nitrogen dioxide, nitrogen monoxide is only removed to a small extent. By adding oxidative compounds, i.e. However, at least one inorganic or organic compound with an oxidative effect, which has an electron potential greater than or equal to 0.96 V, such as vanadium pentoxide or dichlorodicyanoquinone, is also separated here almost quantitatively.

Das Filter gemäß der Erfindung kann beispielsweise bei der Herstellung von Filterzigaretten verwendet und in die bekannten Filterstrukturen inkorporiert werden. Auch kann das Filter für Pfeifen, Zigarettenhalter und Zigarrenhalter, beispielsweise in Form von Filterpatronen, verwendet werden.The filter according to the invention can be used, for example, in the manufacture of filter cigarettes and can be incorporated into the known filter structures. The filter can also be used for pipes, cigarette holders and cigar holders, for example in the form of filter cartridges.

Im allgemeinen kann der Gehalt an Polyarylenthioether A) bis zu 50 Gew.-% des Gesamtgewichtes des Filters betragen, um eine sichere Entfernung der Stickoxide zu gewährleisten, vorzugsweise jedoch mindestens 5 Gew.-%.In general, the content of polyarylene thioether A) can be up to 50% by weight of the total weight of the filter in order to ensure safe removal of the nitrogen oxides, but preferably at least 5% by weight.

Wenn in Tabakrauchfiltern gemäß der Erfindung der Polyarylenthioether A) in Form von Fasern eingesetzt wird, können diese sowohl in einem getrennten räumlichen Abschnitt des Filters lokalisiert sein oder auch in Mischung mit den üblichen, für die Rauchfilter verwendeten Fasermaterialien verwendet werden.If polyarylene thioether A) is used in the form of fibers in tobacco smoke filters according to the invention, these can either be located in a separate spatial section of the filter or can be used in a mixture with the customary fiber materials used for the smoke filters.

Claims (11)

Filter zur Entfernung von Stickoxiden (NOx) aus Tabakrauch, bestehend aus A) einen Polyarylenthioether mit wiederkehrenden Einheiten der Formel



        -[(Ar¹ )n-X]m-[(Ar²)i-Y]j-[(Ar³)k-Z]l-[(Ar⁴)o-W]p-   (I)



in Form von Fasern, Filmen und/oder Pulver, wobei Ar¹, Ar², Ar³, Ar⁴, W, X, Y und Z unabhängig voneinander gleich oder verschieden sind, die Indizes n, m, i, j, k, l, o und p unabhängig voneinander Null oder ganze Zahlen 1,2,3 oder 4 sind, wobei ihre Summe mindestens 2 ist, Ar¹, Ar², Ar³ und Ar⁴ Arylensysteme mit 6 bis 18 C-Atomen sind und W, X, Y und Z zweiwertige Verknüpfungsgruppen darstellen, ausgewählt aus -S-, -SO-, -SO₂-, -O-, -CO-, -CO₂- oder Alkylen- oder Alkylidengruppen mit 1 bis 6 C-Atomen,
B) gegebenenfalls einen herkömmlichen Filtermaterial und
C) gegebenenfalls mindestens einem oberflächenaktiven Festkörper.Filter for removing nitrogen oxides (NO x ) from tobacco smoke, consisting of A) a polyarylene thioether with recurring units of the formula



- [(Ar¹) n -X] m - [(Ar²) i -Y] j - [(Ar³) k -Z] l - [(Ar⁴) o -W] p - (I)



in the form of fibers, films and / or powder, where Ar¹, Ar², Ar³, Ar⁴, W, X, Y and Z are independently the same or different, the indices n, m, i, j, k, l, o and p independently of one another are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar¹, Ar², Ar³ and Ar⁴ are arylene systems with 6 to 18 C atoms and W, X, Y and Z represent divalent linking groups , selected from -S-, -SO-, -SO₂-, -O-, -CO-, -CO₂- or alkylene or alkylidene groups with 1 to 6 C atoms,
B) optionally a conventional filter material and
C) optionally at least one surface-active solid. Filter nach Anspruch 1, dadurch gekennzeichnet, daß Stickstoffdioxid entfernt wird.Filter according to claim 1, characterized in that nitrogen dioxide is removed. Filter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Komponente A) Polyphenylensulfid mit wiederkehrenden Einheiten der Formel
Figure imgb0002
 eingesetzt wird.Filter according to claim 1 or 2, characterized in that as component A) polyphenylene sulfide with repeating units of the formula
Figure imgb0002
 is used. Filter nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Anteil der Komponente A), die ein mittleres Molekulargewicht Von 4000 bis 200 000 aufweist, 5 bis 50 Gew.-% beträgt.Filter according to one or more of Claims 1 to 3, characterized in that the proportion of component A) which has an average molecular weight of 4,000 to 200,000 is 5 to 50% by weight. Filter nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zusätzlich mindestens ein Oxidationsmittel mit einem Elektronenpotential von großer gleich 0,96 V zugesetzt wird.Filter according to one or more of claims 1 to 4, characterized in that at least one oxidizing agent with an electron potential greater than or equal to 0.96 V is additionally added. Filter nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Komponente A) in Pulverform eine mittlere Teilchengröße von bis zu 300 µm, vorzugsweise 20 bis 100 µm aufweist.Filter according to one or more of claims 1 to 5, characterized in that component A) in powder form has an average particle size of up to 300 µm, preferably 20 to 100 µm. Filter nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Komponente B) aus Cellulose, Celluloseacetat und/oder Polyolefinen besteht.Filter according to one or more of claims 1 to 6, characterized in that component B) consists of cellulose, cellulose acetate and / or polyolefins. Filter nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß als Komponente C) Aktivkohle oder Aluminiumoxid eingesetzt wird.Filter according to one or more of claims 1 to 7, characterized in that activated carbon or aluminum oxide is used as component C). Verwendung des Filters nach einem oder mehreren der Ansprüche 1 bis 8 für die Herstellung von Filterzigaretten oder als Filterpatrone.Use of the filter according to one or more of claims 1 to 8 for the manufacture of filter cigarettes or as a filter cartridge. Verwendung nach Anspruch 8 zur Entfernung gasförmiger Inhaltsstoffe und Teerbestandteile des Rauches.Use according to claim 8 for the removal of gaseous ingredients and tar components of the smoke. Verwendung nach Anspruch 8 zur Entfernung von Stickoxiden.Use according to claim 8 for the removal of nitrogen oxides.
EP94119946A 1993-12-22 1994-12-16 Filter for eliminating nitrogen oxides from tobacco smoke. Withdrawn EP0659355A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4343920A DE4343920A1 (en) 1993-12-22 1993-12-22 Filters to remove nitrogen oxides from tobacco smoke
DE4343920 1993-12-22

Publications (2)

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EP0659355A2 true EP0659355A2 (en) 1995-06-28
EP0659355A3 EP0659355A3 (en) 1997-04-16

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US (1) US5575302A (en)
EP (1) EP0659355A3 (en)
JP (1) JPH07203936A (en)
DE (1) DE4343920A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0697238A2 (en) * 1994-08-15 1996-02-21 Hoechst Aktiengesellschaft Filtering material and process for eliminating halogens and peroxid containing compounds
WO1996012551A1 (en) * 1994-10-25 1996-05-02 Hoechst Aktiengesellschaft Filter material and process for producing no2-free gases

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001296580A1 (en) 2000-10-05 2002-04-15 Nicolas Baskevitch Reduction of nitrosamines in tobacco and tobacco products
US6779529B2 (en) * 2001-08-01 2004-08-24 Brown & Williamson Tobacco Corporation Cigarette filter
US20030066539A1 (en) * 2001-08-01 2003-04-10 Figlar James N. Cigarette Filter
ES2206046B1 (en) * 2002-10-21 2005-08-01 Juan Guerrero Moles CATALYTIC FILTER FOR CIGARETTES.
US20050133053A1 (en) * 2003-12-22 2005-06-23 Philip Morris Usa Inc. Smoking articles comprising copper-exchanged molecular sieves
JP4820596B2 (en) * 2005-07-21 2011-11-24 住友精化株式会社 Nitric oxide purification method
US9220296B2 (en) 2013-03-15 2015-12-29 Safall Fall Method of reducing tobacco-specific nitrosamines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150806A (en) * 1983-11-25 1985-07-10 Filtrona Ltd Tobacco smoke filter
EP0250806A2 (en) * 1986-06-30 1988-01-07 Hercules Incorporated Method and device for removing nitric oxide from cigarette smoke
EP0351352A2 (en) * 1988-07-15 1990-01-17 Schering Aktiengesellschaft 2-Substituted ergolines, their preparation and use

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434479A (en) * 1966-09-15 1969-03-25 Liggett & Myers Tobacco Co Permanganate tobacco smoke filter
US4661299A (en) * 1985-03-04 1987-04-28 Phillips Petroleum Company Radio frequency energy sensitized compositions and method for sensitizing compositions to radio frequency energy
US4968726A (en) * 1985-03-04 1990-11-06 Phillips Petroleum Company Radio frequency energy sensitized compositions and method for sensitizing compositions to ratio frequency energy
US4790965A (en) * 1985-03-04 1988-12-13 Phillips Petroleum Company Method for sensitizing compositions to radio frequency energy
US4767799A (en) * 1985-03-04 1988-08-30 Phillips Petroleum Company Radio frequency energy sensitized compositions and method for sensitizing compositions to radio frequency energy
US4763674A (en) * 1986-04-16 1988-08-16 Hercules Incorporated Method and device for controlling hydrogen cyanide and nitric oxide concentrations in cigarette smoke
US4749598A (en) * 1987-02-19 1988-06-07 Phillips Petroleum Company Poly(arylene sulfide) composition and process
US4810590A (en) * 1987-02-19 1989-03-07 Phillips Petroleum Company Poly(arylene sulfide) encapsulation process and article
JPH01111095A (en) * 1987-10-22 1989-04-27 Toray Ind Inc Activated carbon fiber molded product
JPH02113878A (en) * 1988-07-15 1990-04-26 Moscow Tabacnaja Fab Yava Composition for absorbing nitrogen oxide from tobacco smoke and filter for purifying tobacco smoke using said composition
DE4345218C2 (en) * 1993-08-24 1997-09-04 Hoechst Ag Process for removing nitrogen oxides from gases and liquids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150806A (en) * 1983-11-25 1985-07-10 Filtrona Ltd Tobacco smoke filter
EP0250806A2 (en) * 1986-06-30 1988-01-07 Hercules Incorporated Method and device for removing nitric oxide from cigarette smoke
EP0351352A2 (en) * 1988-07-15 1990-01-17 Schering Aktiengesellschaft 2-Substituted ergolines, their preparation and use

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 8923 Derwent Publications Ltd., London, GB; AN 89-169638 XP002025144 & JP 01 111 095 A (TORAY IND. KK) , 27.April 1989 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0697238A2 (en) * 1994-08-15 1996-02-21 Hoechst Aktiengesellschaft Filtering material and process for eliminating halogens and peroxid containing compounds
EP0697238A3 (en) * 1994-08-15 1996-11-20 Hoechst Ag Filtering material and process for eliminating halogens and peroxid containing compounds
WO1996012551A1 (en) * 1994-10-25 1996-05-02 Hoechst Aktiengesellschaft Filter material and process for producing no2-free gases
US5846297A (en) * 1994-10-25 1998-12-08 Ticona Gmbh Filter material and process for producing No2 -free gases or liquids

Also Published As

Publication number Publication date
JPH07203936A (en) 1995-08-08
EP0659355A3 (en) 1997-04-16
DE4343920A1 (en) 1995-06-29
US5575302A (en) 1996-11-19

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