DE4343359A1 - Automobile fresh air filter - Google Patents

Automobile fresh air filter

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Publication number
DE4343359A1
DE4343359A1 DE19934343359 DE4343359A DE4343359A1 DE 4343359 A1 DE4343359 A1 DE 4343359A1 DE 19934343359 DE19934343359 DE 19934343359 DE 4343359 A DE4343359 A DE 4343359A DE 4343359 A1 DE4343359 A1 DE 4343359A1
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Germany
Prior art keywords
fresh air
air filter
filter according
benzene
adsor
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.)
Withdrawn
Application number
DE19934343359
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German (de)
Inventor
Hasso Von Bluecher
Ernest De Dr Ruiter
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Individual
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Individual
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Priority to DE19934343359 priority Critical patent/DE4343359A1/en
Publication of DE4343359A1 publication Critical patent/DE4343359A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H3/00—Other air-treating devices
    • B60H3/06—Filtering
    • B60H3/0658—Filter elements specially adapted for their arrangement in vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/116—Molecular sieves other than zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/20—Organic adsorbents
    • B01D2253/202—Polymeric adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/308—Pore size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
    • 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
    • B01D53/04—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 with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • B01D53/0415—Beds in cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H3/00—Other air-treating devices
    • B60H3/06—Filtering
    • B60H2003/0691—Adsorption filters, e.g. activated carbon

Abstract

An automobile fresh air filter, for specific adsorption of petrol, has adsorbents with micropores or micro-slits of 1.5-3 angstroms diameter. Pref. the adsorbent is active coal, active coke, a carbon molecular sieve, an inorganic material or a porous polymer.

Description

Noch vor wenigen Jahren wurden den Schadstoffen in der in ein Fahrzeug eingeführten Frischluft kaum Aufmerksamkeit geschenkt. Lediglich sorgten grobmaschige Gitter dafür, daß keine größeren Gegenstände das Gebläse schädigen konnten. Ein erster Schritt in die gute Richtung waren Pollenfilter, die insbesondere Allergikern das Autofahren erleichtern sollten. Inzwischen wuchs die Erkenntnis, daß auch der Nicht-Allergiker gesundheitschädigenden Stoffen ausgesetzt ist.A few years ago, the pollutants were in the in a vehicle imported fresh air hardly paid attention. Just worried coarse-mesh grille to ensure that no larger objects are blown could damage. A first step in the right direction was pollen filters, which should make driving easier, especially for allergy sufferers. In the meantime the awareness grew that even non-allergy sufferers are harmful to health Exposed to substances.

Es hat sich herausgestellt, daß die Schadstoff-Konzentration im Innenraum ei­ nes Kfz um ein Vielfaches höher sein kann als die am Straßenrand gemesse­ nen Konzentrationen, und zwar deshalb, weil das Auto der Hauptverursacher der Schadstoffe im Straßenbereich ist und im dichten Verkehr die Abgase des Vordermanns weniger verdünnt sind als in der "durchschnittlichen" Luft. Die Schadstoffe liegen als Partikel und im gasförmigen Zustand vor. Bei den Parti­ keln handelt es sich in erster Linie um Dieselruß, Abrieb von Bremsbelegen und Reifen, bei den gasförmigen Schadstoffen handelt sich im wesentlichen um saure Gase (SO₂, NOx), aliphatische und aromatische Kohlenwasserstoffe, die teils anoxidiert sein könnten und CO. Rußpartikel werden heute als krebs­ erregend betrachtet. Außerdem adsorbieren sie - ähnlich wie Aktivkohle - ins­ besondere höher siedende Stoffe, worunter krebserregende kondensierte aro­ matische Kohlenwasserstoffe. Neben diesen eigentlichen Schadstoffen gibt es geruchsintensive Stoffe, die schädlich sein können, aber nicht müssen; sie be­ einträchtigen jedenfalls den Komfort.It has been found that the concentration of pollutants in the interior of a motor vehicle can be many times higher than the concentrations measured on the roadside, because the car is the main cause of the pollutants in the road area and in heavy traffic the exhaust gases of the Vordermanns are less diluted than in the "average" air. The pollutants exist as particles and in the gaseous state. The particles are primarily diesel soot, abrasion from brake pads and tires, the gaseous pollutants are essentially acidic gases (SO₂, NO x ), aliphatic and aromatic hydrocarbons, some of which could be oxidized and CO. Soot particles are now considered carcinogenic. In addition, similar to activated carbon, they adsorb in particular higher-boiling substances, including carcinogenic condensed aromatic hydrocarbons. In addition to these actual pollutants, there are odor-intensive substances that can be harmful, but do not have to; in any case, they impair comfort.

Nach den ursprünglichen "Pollenfiltern" kamen verbesserte Partikelfilter, die auch einen beachtlichen Teil der Rußpartikel entfernten, nicht aber Schadstof­ fe im gasförmigen Zustand. Außerdem wurde festgestellt, daß an den von Fil­ tern festgehaltenen Rußpartikeln adsorbierte Schadstoffe, beispielsweise poly­ kondensierte aromatische Kohlenwasserstoffe, nach einiger Zeit desorbieren und in die Fahrzeugkabine gelangen. Schließlich können Partikelfilter keine Geruchsbelästigungen vermeiden. Es war klar, daß nur die Kombination eines sehr guten Partikelfilters mit einem geeigneten Adsorptionsfilter eine wirksame Lösung des Schadstoffproblems bieten konnte.After the original "pollen filters" improved particle filters came also removed a considerable part of the soot particles, but not pollutants fe in the gaseous state. It was also found that the fil trapped soot particles adsorbed pollutants, such as poly  condensed aromatic hydrocarbons, desorb after some time and get into the vehicle cabin. After all, particle filters cannot Avoid unpleasant smells. It was clear that only the combination of one very good particle filter with a suitable adsorption filter an effective Could offer a solution to the pollutant problem.

Eine Zwischenlösung bietet eine renomierte Autofirma in ihrem Topmodell an:
Auf das Partikelfilter folgt ein Aktivkohlefilter, das in erster Linie als Geruchsfil­ ter gedacht ist, da nicht-imprägnierte Aktivkohle viele flüchtige Schadgase (SO₂, NOx, NH₃ . . . CO) nicht bzw. nicht ausreichend binden kann. Zweifelsoh­ ne werden in der Zukunft Filter mit zumindest teilweise imprägnierter Aktivkoh­ le zur Anwendung kommen, wobei Imprägnierungen mit katalytischen Effekten (Oxidation) ebenfalls eine Rolle spielen werden.An interim solution is offered by a renowned car company in its top model:
The particle filter is followed by an activated carbon filter, which is primarily intended as an odor filter, since non-impregnated activated carbon cannot or does not adequately bind many volatile harmful gases (SO₂, NO x , NH₃... CO). Undoubtedly, filters with at least partially impregnated activated carbon will be used in the future, impregnations with catalytic effects (oxidation) will also play a role.

Ein relativ gefährlicher Schadstoff ist das krebserregende Benzol. Benzol ist im Kraftstoff enthalten und kann durch Lecks am Kraftstoffsystem, aber auch durch unvollständige Verbrennung, die Luft belasten. Für Benzol gibt es keine chemische Imprägnierung bzw. Katalysatoren, also muß die Entfernung von Benzol über die reine physikalische Adsorption erreicht werden.Cancer-causing benzene is a relatively dangerous pollutant. Is benzene contained in the fuel and can also be caused by leaks in the fuel system due to incomplete combustion, polluting the air. There are none for benzene chemical impregnation or catalysts, so the removal of Benzene can be achieved through pure physical adsorption.

Es hat sich nun überraschenderweise in Langzeitversuchen gezeigt, daß Ben­ zol zwar gut auf Aktivkohle adsorbiert, aber mit der Zeit durch höher siedende, z. T. auch polyzyklische Verbindungen, verdrängt wird. So verdrängt das weni­ ger giftige Toluol und Xylol das Benzol von seinen Adsorptionsplätzen, wel­ ches dann wieder in den Kfz-Innenraum eindringt. So sieht man bei einem Fil­ ter, der aus verschiedenen Lagen besteht, wie Benzol zuerst in der vorderen Schicht adsorbiert wird, aber dann unter dem "Druck" höher siedender Stoffe von einer Schicht in die folgende verdrängt wird, um schließlich auszutreten. Natürlich kann man die Filterschicht eines Kfz-Frischluftfilters dermaßen dick gestalten und die Kapazität dermaßen erhöhen, daß nach einer Fahrstrecke von 50 000-100 000 km kein Benzol austritt. Solche überdimensionierte Filter sind nicht wirtschaftlich und auch fehlt der Platz.Surprisingly, it has now been shown in long-term experiments that Ben zol adsorbed well on activated carbon, but over time due to higher boiling e.g. T. also polycyclic compounds, is displaced. So that displaces little poisonous toluene and xylene the benzene from its adsorption sites, wel ches then penetrates back into the vehicle interior. So you see with a fil ter, which consists of different layers, like benzene first in the front Layer is adsorbed, but then under the "pressure" of higher boiling substances is shifted from one layer to the next to finally emerge. Of course, the filter layer of a vehicle fresh air filter can be so thick shape and increase the capacity so that after a trip no benzene leaks from 50,000-100,000 km. Such oversized filters  are not economical and space is also lacking.

Es war die Aufgabe der vor­ liegenden Erfindung, diese unbefriedigende Situation zu verbessern.It was the job of before lying invention to improve this unsatisfactory situation.

Es wurde überraschenderweise gefunden, daß bei Adsorptionsfiltern auf Basis bestimmter Aktivkokse bzw. Aktivkohle-Siebe Benzol nicht durch höher sie­ dende Stoffe verdrängt wird. Ausgedehnte Versuche haben gezeigt, daß wahrscheinlich die Adsorptionsplätze für größere Moleküle nicht mehr zugäng­ lich sind. In Aktivkoks werden "Porendurchmesser" von ca. 2 Å und etwas drü­ ber gefunden. Da es sich um schlitzförmige Poren handelt, kann man sich vor­ stellen, daß das flache Benzolmolekül hineinpaßt, aber Toluol schon nicht mehr. Bei "Aktivkohle-Sieben" wird der Poreneingang durch niedergeschlage­ nen Kohlenstoff verengt. Dieser Flaschenhals läßt sich in bestimmten Grenzen variieren. Auf Grund der mit Aktivkoks gemachten Erfahrung wurde ein "Fla­ schenhals" von ca. 2-3 Å angestrebt. Auch in diesem Fall konnte Benzol se­ lektiv adsorbiert werden.It has surprisingly been found that in adsorption filters based on Certain activated coke or activated carbon sieves do not have higher benzene displaced substances. Extensive tests have shown that probably the adsorption sites for larger molecules are no longer accessible are. In activated coke, "pore diameters" of approx. 2 Å and slightly over found about. Since it is slit-shaped pores, one can imagine make sure that the flat benzene molecule fits in, but not toluene more. In "activated carbon screening", the pore entrance is suppressed by constricted carbon. This bottleneck can be limited vary. Based on the experience with activated coke, a "Fla between 2-3 Å. In this case too, benzene could be adsorbed selectively.

In einem mehrschichtigen Filter wird man die spezifischen Benzol-Filterschich­ ten am Ende der Filterstrecke einbauen, wo das allmählich aus den ersten Fil­ terschichten (mit normaler Aktivkohle) verdrängte Benzol in den sehr engen Poren dauerhaft festgehalten wird.In a multi-layer filter one becomes the specific benzene filter layer Install at the end of the filter section, where this gradually emerges from the first fil layers (with normal activated carbon) displaced benzene in the very narrow Pores is permanently retained.

Ein sehr geeignetes System zum Aufbau eines Mehrschicht-Filters ist in der DE 38 13 563 A1 beschrieben: An einer dreidimensionalen Trägermatrix, be­ vorzugterweise ein großporiger, retikulierter PU-Schaum, sind mit einer Haft­ masse kleine Adsorberteilchen befestigt. Der große Vorteil des Systems be­ steht darin, daß trotz der für die Adsorptionskinetik günstige kleinen Teilchen­ größe - normalerweise < 1 mm - die Luftdurchlässigkeit bei gleicher Leistung etwa 10 × höher ist als bei herkömmlichen Schüttfiltern. Des weiteren sind die selbstragenden Matten einfach zu verarbeiten - Einschieben in einen Rah­ men - und dank der Fixierung der einzelnen Teilchen, die nicht gegeneinan­ der reiben, sehr abriebarm. Bei einem schichtförmigen Aufbau wird der Ben­ zolfilter bevorzugt nach den üblichen Adsorptionsfiltern eingesetzt.A very suitable system for building a multilayer filter is in the DE 38 13 563 A1 describes: on a three-dimensional carrier matrix, be preferably a large-pore, reticulated PU foam, are with an adhesive mass of small adsorber particles attached. The great advantage of the system be is that despite the small particles favorable for the adsorption kinetics size - usually <1 mm - the air permeability with the same performance is about 10 × higher than with conventional bulk filters. Furthermore, they are self-supporting mats easy to process - insert into a frame men - and thanks to the fixation of the individual particles that are not against each other the rub, very low abrasion. With a layered structure, the Ben  zolfilter preferably used after the usual adsorption filters.

Grundsätzlich ist aber jedes Filtersystem geeignet, sofern es die erforderliche Porenstruktur aufweist. Neben Adsorbentien auf Kohlenstoff-Basis (Aktivkohle, Aktivkoks, Kohlenstoff-Molekularsiebe) kommen auch poröse Polymere und inorganische Adsorbentien in Frage.In principle, however, any filter system is suitable, provided that it is the required one Has pore structure. In addition to carbon-based adsorbents (activated carbon, Activated coke, carbon molecular sieves) also come in porous polymers and inorganic adsorbents in question.

Claims (7)

1. Frischluftfilter für Kraftfahrzeuge mit spezifischer, auf Benzol ausgerichte­ ter Adsorption, dadurch gekennzeichnet, daß die Adsorbentien Mikroporen oder Mikroschlitze mit einem Durchmesser von 1,5-3 Å besitzen.1. Fresh air filter for motor vehicles with specific, benzene-oriented ter adsorption, characterized in that the adsorbents have micropores or micro-slots with a diameter of 1.5-3 Å. 2. Frischluftfilter nach Anspruch 1, dadurch gekennzeichnet, daß das Adsor­ bens Aktivkohle ist.2. Fresh air filter according to claim 1, characterized in that the adsor bens is activated carbon. 3. Frischluftfilter nach Anspruch 1, dadurch gekennzeichnet, daß das Adsor­ bens Aktivkoks ist.3. Fresh air filter according to claim 1, characterized in that the adsor bens is activated coke. 4. Frischluftfilter nach Anspruch 1, dadurch gekennzeichnet, daß das Adsor­ bens ein Kohlenstoff-Molekularsieb ist.4. Fresh air filter according to claim 1, characterized in that the adsor bens is a carbon molecular sieve. 5. Frischluftfilter nach Anspruch 1, dadurch gekennzeichnet, daß das Adsor­ bens ein anorganisches Material ist.5. Fresh air filter according to claim 1, characterized in that the adsor bens is an inorganic material. 6. Frischluftfilter nach Anspruch 1, dadurch gekennzeichnet, daß das Adsor­ bens ein poröser Polymer ist.6. Fresh air filter according to claim 1, characterized in that the adsor is a porous polymer. 7. Frischluftfilter nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in einem schichtförmigen Aufbau zuerst die üblichen Adsorptionsfilter und erst dahinter die Benzolfilterschicht einge­ baut sind.7. Fresh air filter according to one or more of the preceding claims, characterized in that first in a layered structure usual adsorption filter and only behind the benzene filter layer are building.
DE19934343359 1993-12-18 1993-12-18 Automobile fresh air filter Withdrawn DE4343359A1 (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533464A1 (en) * 1995-09-09 1997-03-13 Bluecher Hasso Von Filter material with high affinity and capacity for adsorbing radon from air stream
DE19544990A1 (en) * 1995-12-02 1997-06-05 Bluecher Hasso Von Cabin air filters with combined particle and adsorption filtration
DE19617755A1 (en) * 1996-05-03 1997-11-13 Bluecher Gmbh Filter material

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU502842A1 (en) * 1974-01-29 1976-02-15 Ленинградский Ордена Трудового Красного Знамени Технологический Институт Им. Ленсовета The method of producing carbon adsorbent
SU610791A1 (en) * 1976-04-01 1978-06-15 Институт Торфа Академии Наук Белорусской Сср Method of obtaining active carbon from peat
DE2911428A1 (en) * 1979-03-23 1980-10-02 Hoelter Ges Fuer Patenverwertu Filter for air supply to lorry cabs - having set of chemically absorbent layers for different contaminants held apart by felt or other woven or nonwoven material
SU1530570A1 (en) * 1988-03-01 1989-12-23 Ленинградский Технологический Институт Им.Ленсовета Method of producing carbon adsorbent
WO1991011247A1 (en) * 1990-01-23 1991-08-08 Bluecher Hasso Von Filter material for motor vehicles
DE4020427A1 (en) * 1990-06-27 1992-01-02 Hasso Von Bluecher Adsorbent impregnated fabric filter - with low flow resistance, suitable for compact air conditioner units
DE4027799A1 (en) * 1990-09-01 1992-03-05 Hasso Von Bluecher Odour filter for fresh air introduced into vehicle cabins - comprises absorber resin fixed on air-permeable system
DE4040104A1 (en) * 1990-12-16 1992-06-17 Behr Gmbh & Co FILTERS FOR AN AIR CONDITIONING OR HEATING SYSTEM FOR A MOTOR VEHICLE
DE4039952A1 (en) * 1990-12-14 1992-06-17 Hasso Von Bluecher Zeolite adsorber for exhaust catalytic converters - for emissions redn. during cold start=up period of diesel engines
DE4119272A1 (en) * 1991-06-12 1992-12-17 Hasso Von Bluecher Hydrocarbon emission filter system vehicle fuel tanks - has additional filler contg. active carbon@, porous polymer etc. for reducing desorbed hydrocarbon concn. peak
DE4134222A1 (en) * 1991-10-16 1993-04-22 Hasso Von Bluecher Air filter for car interiors - consists of porous e.g. polyester fabric covered with preferred type activated carbon@ to remove odour of vehicle exhaust gases

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU502842A1 (en) * 1974-01-29 1976-02-15 Ленинградский Ордена Трудового Красного Знамени Технологический Институт Им. Ленсовета The method of producing carbon adsorbent
SU610791A1 (en) * 1976-04-01 1978-06-15 Институт Торфа Академии Наук Белорусской Сср Method of obtaining active carbon from peat
DE2911428A1 (en) * 1979-03-23 1980-10-02 Hoelter Ges Fuer Patenverwertu Filter for air supply to lorry cabs - having set of chemically absorbent layers for different contaminants held apart by felt or other woven or nonwoven material
SU1530570A1 (en) * 1988-03-01 1989-12-23 Ленинградский Технологический Институт Им.Ленсовета Method of producing carbon adsorbent
WO1991011247A1 (en) * 1990-01-23 1991-08-08 Bluecher Hasso Von Filter material for motor vehicles
DE4101658A1 (en) * 1990-01-23 1991-10-24 Hasso Von Bluecher FILTER MATERIAL FOR MOTOR VEHICLES
DE4020427A1 (en) * 1990-06-27 1992-01-02 Hasso Von Bluecher Adsorbent impregnated fabric filter - with low flow resistance, suitable for compact air conditioner units
DE4027799A1 (en) * 1990-09-01 1992-03-05 Hasso Von Bluecher Odour filter for fresh air introduced into vehicle cabins - comprises absorber resin fixed on air-permeable system
DE4039952A1 (en) * 1990-12-14 1992-06-17 Hasso Von Bluecher Zeolite adsorber for exhaust catalytic converters - for emissions redn. during cold start=up period of diesel engines
DE4040104A1 (en) * 1990-12-16 1992-06-17 Behr Gmbh & Co FILTERS FOR AN AIR CONDITIONING OR HEATING SYSTEM FOR A MOTOR VEHICLE
DE4119272A1 (en) * 1991-06-12 1992-12-17 Hasso Von Bluecher Hydrocarbon emission filter system vehicle fuel tanks - has additional filler contg. active carbon@, porous polymer etc. for reducing desorbed hydrocarbon concn. peak
DE4134222A1 (en) * 1991-10-16 1993-04-22 Hasso Von Bluecher Air filter for car interiors - consists of porous e.g. polyester fabric covered with preferred type activated carbon@ to remove odour of vehicle exhaust gases

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533464A1 (en) * 1995-09-09 1997-03-13 Bluecher Hasso Von Filter material with high affinity and capacity for adsorbing radon from air stream
DE19544990A1 (en) * 1995-12-02 1997-06-05 Bluecher Hasso Von Cabin air filters with combined particle and adsorption filtration
DE19617755A1 (en) * 1996-05-03 1997-11-13 Bluecher Gmbh Filter material
DE19617755B4 (en) * 1996-05-03 2004-05-13 Mhb Filtration Gmbh & Co. Kg Adsorption material and filter block built from it

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