DE4331586C2 - Activated carbon agglomerates - Google Patents
Activated carbon agglomeratesInfo
- Publication number
- DE4331586C2 DE4331586C2 DE4331586A DE4331586A DE4331586C2 DE 4331586 C2 DE4331586 C2 DE 4331586C2 DE 4331586 A DE4331586 A DE 4331586A DE 4331586 A DE4331586 A DE 4331586A DE 4331586 C2 DE4331586 C2 DE 4331586C2
- Authority
- DE
- Germany
- Prior art keywords
- activated carbon
- particles
- pitch
- agglomerates
- infusible
- 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.)
- Expired - Fee Related
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 34
- 239000002245 particle Substances 0.000 claims description 20
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000011324 bead Substances 0.000 description 8
- 239000003245 coal Substances 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 244000078534 Vaccinium myrtillus Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 235000021029 blackberry Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- -1 ion exchange shear Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
-
- 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
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/018—Granulation; Incorporation of ion-exchangers in a matrix; Mixing with inert materials
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Carbon And Carbon Compounds (AREA)
Description
Die Verwendung von Schüttungen (Schüttfilter) ist die Wichtigste Anwendungs form um Teilchen mit spezifischer Wirkung (z. B. Adsorbentien, Ionenaustau scher, Katalysatoren) mit einem Gas oder einer Flüssigkeit in Kontakt zu brin gen. Da bei kleinen Teilchen eine größere Oberfläche zur Verfügung steht als bei großen, ist bei ersteren erwartungsgemäß die Wirkungsweise besser. Al lerdings führen kleine Teilchen zu einem hohen Druckverlust und wird die Bil dung von Kanälen gefördert. Aus diesem Grund kann die anzuwendende Teil chengröße bei Schüttungen immer nur ein Kompromiß sein.The use of bulk materials (bulk filter) is the most important application shape around particles with a specific effect (e.g. adsorbents, ion exchange shear, catalysts) in contact with a gas or a liquid Since there is a larger surface area available for small particles than with large ones, the expected mode of action is better with the former. Al However, small particles lead to a high pressure loss and the bil promotion of channels. Because of this, the part to be applied size of fillings can only ever be a compromise.
Diese Probleme sind beispielsweise den Betreibern von Aktivkohle- Schüttfiltern sehr wohl bekannt; wegen der zwecks Erreichen eines wirtschaft lichen Druckverlustes größeren Teilchen, wird oft ein beträchtlicher Teil der theoretisch vorhandenen Kapazität nicht genutzt.These problems are, for example, the operators of activated carbon Bulk filter very well known; because of the purpose of reaching an economy pressure loss larger particles, often becomes a considerable part of the theoretically existing capacity not used.
In der EP 0340542 A1 wird für das Entfernen von Schadstoffen aus Luftströmen bei sehr geringem Druckverlust ein System vorgeschlagen, welches grund sätzlich auch für Flüssigkeiten anwendbar ist; um die günstige Kinetik kleiner Adsorberteilchen nutzen zu können, ohne einen hohen Druckverlust in Kauf nehmen zu müssen, werden die Teilchen mit Hilfe einer Haftmasse auf ein dreidimensionales Trägersystem aufgebracht, dessen Öffnungen den Druck verlust bestimmen. Das System hat neben Vorteilen auch Nachteile: es ist nicht für Schüttungen geeignet und sowohl die Haftmasse als auch das Trä gersystem können Schwachstellen sein.EP 0340542 A1 describes the removal of pollutants from air streams proposed a system with very little pressure loss, which reason is also applicable for liquids; to make the favorable rate smaller To be able to use adsorber particles without a high pressure loss in purchase need to take the particles with the help of an adhesive three-dimensional carrier system applied, the openings of the pressure determine loss. In addition to advantages, the system also has disadvantages: it is not suitable for fillings and both the adhesive and the backing system can be weak points.
Der Anmeldungsgegenstand liegt die Aufgabe zugrunde für Aktivkohleschüt tungen ein System zu schaffen, welches nur aus Aktivkohle besteht und trotz kleiner Adsorberteilchen einen geringen Durchflußwiderstand aufweist.The object of the registration is based on the task for activated carbon to create a system that only consists of activated carbon and despite small adsorber particles has a low flow resistance.
Die Aufgabe wird gelöst durch Agglomerate aus Aktivkohleteilchen, die durch körnige Binderteilchen, die ihrerseits in Aktivkohle umgesetzt werden, zusam mengehalten werden. Ähnlich wie in der EP 0340542 A1 hat man zwei Typen von Hohlräumen: kleine zwischen den Teilchen, die deren Zugänglichkeit er möglichen und große zwischen den Agglomeraten, die für einen geringen Durchflußwiderstand sorgen. Agglomerate werden zwar bereits in der DE-OS 24 02 901 beschrieben, doch sind diese aus vermahlener Aktivkohle und sehr kleinen Teilchen eines thermoplastischen Binders (Schmelzkleber) her gestellt mit den daraus folgenden Nachteilen.The task is solved by agglomerates made of activated carbon particles granular binder particles, which in turn are converted into activated carbon be kept. Similar to EP 0340542 A1, there are two types of cavities: small between the particles, the accessibility of which he possible and large between the agglomerates, for a small Provide flow resistance. Agglomerates are already in the DE-OS 24 02 901 described, but these are made of ground activated carbon and very small particles of a thermoplastic binder (hot melt adhesive) posed with the resulting disadvantages.
Die US 3,917,806 A beschreibt ein Verfahren um aus Pechen und Distillations rückständen Aktivkohlekügelchen herzustellen. Zuerst wird das Pech unter Zu hilfenahme eines Schmelzpunkterniedrigers in Pechkügelchen umgesetzt. Nach Extraktion des Schmelzpunkterniedrigers werden die Kügelchen durch kräftige Oxidation unschmelzbar gemacht, um sie weiter verarbeiten zu kön nen (Schwelung und Aktivierung). Ohne Oxidation würden die Kügelchen ver klumpen und schmelzen.US 3,917,806 A describes a process for pitching and distillation residues of activated carbon beads. First, the bad luck under Zu with the help of a melting point depressor converted into pitch balls. After extraction of the melting point depressant, the beads are passed through strong oxidation made infusible so that it can be processed further (smoldering and activation). Without oxidation, the beads would ver lump and melt.
Es wurde gefunden, daß beim Erhitzen einer Mischung von noch nicht un schmelzbar gemachten Kügelchen mit solchen die bereits unschmelzbar ge macht worden sind, erstere mit letzteren verkleben und brombeerartige Agglo merate bilden. Je nach Verhältnis werden sich solche mit nur einem "weichen" Kern, oder solche mit zwei und mehreren weichen Kernen bilden. Anschlie ßend wird der "weiche" Kern, z. B. durch Oxidation, unschmelzbar gemacht und es können die Agglomerate in gewohnter Weise geschwelt und aktiviert werden. Im Gegensatz zur DE-OS 24 02 901 besteht das Endprodukt nur aus Aktivkohle. Grundsätzlich können die erfindungsgemäßen Agglomerate aus jedem Materi al hergestellt werden, welches durch Erhitzten zuerst klebrig wird. bzw. schmilzt, welches unschmelzbar gemacht werden kann und welches sich durch Schwelen und Aktivieren in Aktivkohle umsetzen läßt.It has been found that when a mixture of not yet un beads made meltable with those that are already infusible have been made, glue the former to the latter and blackberry-like agglo form merate. Depending on the relationship, those with only a "soft" Form core, or those with two or more soft cores. Then ßend the "soft" core, for. B. made by oxidation, infusible and it the agglomerates can be swelled and activated in the usual way. In contrast to DE-OS 24 02 901, the end product consists only of activated carbon. In principle, the agglomerates according to the invention can be made from any material al are produced, which first becomes sticky when heated. respectively. melts which can be made infusible and which can can be converted into activated carbon by smoldering and activating.
Nach US 3,917,806 A wurden vorerst Aktivkohlekügelchen mit einem mittleren Durchmesser von 0,5 mm hergestellt. Die Herstellung umfaßt das Vermischen eines (Steinkohlenteer) Pechs mit einem Viskositätsminderer, die Formung der Pechkügelchen, die Extraktion des Viskositätsminderers, das Unschmelz barmachen durch Oxidation und das Schwelen und Aktivieren. Sodann wurde ein Gemisch aus 15 Teilchen Aktivkohlekügelchen und einem Teil noch nicht oxidierter, also noch erweichungsfähiger Kügelchen hergestellt und unter leich ten Druck auf 180°C erhitzt. Nach Abkühlen wurden "Brombeeren" erhalten, die etwa den 3-4-fachen Durchmesser der Kügelchen hatten. Durch Oxida tion wurden die zentralen Kügelchen unschmelzbar gemacht und leicht ge schwelt. Die Schüttung aus den Agglomeraten hatte einen sechsmal kleineren Strömungswiderstand als die Schüttung aus einzelnen Kugeln.According to US 3,917,806 A, activated carbon beads with a medium size were initially used Diameter of 0.5 mm. Manufacturing involves mixing one (coal tar) pitch with a viscosity reducer, the forming the pitch balls, the extraction of the viscosity reducer, the unmelt baring through oxidation and smoldering and activating. Then was a mixture of 15 particles of activated carbon beads and one part not yet Oxidized, so still softening balls made and under light heated to 180 ° C. After cooling, "blackberries" were obtained, which were about 3-4 times the diameter of the beads. Through Oxida tion, the central beads were made infusible and easily melted smoldering. The bed of agglomerates was six times smaller Flow resistance than the bed of individual balls.
Das Beispiel 1 wurde mit ausgesiebter Splitterkohle (Kornkohle), Teilchengrö ße 0,8-1, 2 mm wiederholt, wobei aber der zentrale Kern wie im Beispiel 1 aus einer Pechkugel bestand. Die Ummantelung dieser Pechkohlekugel war zwar wesentlich unregelmäßiger, aber es bildeten sich nur wenige Agglomera te mit mehr als einem Kern. Die Leistung der Schüttung war vergleichbar mit jenen aus Beispiel 1.Example 1 was with screened coal (grain coal), particle size ß 0.8-1.2 mm repeated, but with the central core as in Example 1 consisted of a pitch ball. The sheathing of this pitch coal ball was Although much more irregular, only a few agglomerates were formed with more than one core. The performance of the fill was comparable to that from example 1.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4331586A DE4331586C2 (en) | 1993-09-17 | 1993-09-17 | Activated carbon agglomerates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4331586A DE4331586C2 (en) | 1993-09-17 | 1993-09-17 | Activated carbon agglomerates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE4331586A1 DE4331586A1 (en) | 1995-03-23 |
| DE4331586C2 true DE4331586C2 (en) | 1998-09-03 |
Family
ID=6497915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4331586A Expired - Fee Related DE4331586C2 (en) | 1993-09-17 | 1993-09-17 | Activated carbon agglomerates |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4331586C2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202008016507U1 (en) | 2008-11-14 | 2009-12-31 | BLüCHER GMBH | Adsorptive shaped bodies |
| DE202008016506U1 (en) | 2008-11-14 | 2009-12-31 | BLüCHER GMBH | Adsorptive structures |
| DE102008058248A1 (en) | 2008-11-14 | 2010-05-20 | BLüCHER GMBH | Adsorptive moldings and their use |
| DE202010009493U1 (en) | 2010-02-15 | 2011-04-07 | BLüCHER GMBH | Agglomerates of adsorbent particles |
| DE102009044675A1 (en) * | 2009-11-27 | 2011-06-01 | Wolf Pvg Gmbh & Co. Kg | Filter material for odor- and pollutant filters, comprises an expanded absorbent filling, which comprises agglomerate, which is formed predominantly from absorbent particles, which are adhered with a binding agent |
| DE202010009494U1 (en) | 2010-02-15 | 2011-06-09 | Blücher GmbH, 40699 | Adsorptive structures with particle and / or aerosol filter function |
| DE202012003179U1 (en) | 2011-09-30 | 2012-10-04 | BLüCHER GMBH | Sebst-bearing structures with adsorptive properties |
Families Citing this family (2)
| 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 |
| DE202019104693U1 (en) | 2019-08-27 | 2019-09-13 | Alexander Schmidt | Filter element in the form of a granular dry filter |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2402901A1 (en) * | 1973-01-26 | 1974-08-01 | Coal Industry Patents Ltd | PROCESS FOR PRODUCING AGGLOMERATES FROM CARBON SUBSTANCES |
| DE2407887A1 (en) * | 1973-02-23 | 1974-08-29 | Coal Industry Patents Ltd | PROCESS FOR AGGLOMERATING AND FORMING CARBON MATERIAL |
| DE2932571B2 (en) * | 1978-08-11 | 1981-02-26 | Kureha Kagaku Kogyo K.K., Tokio | Process for the production of spherical carbon particles or spherical activated carbon particles |
| GB2061902A (en) * | 1979-11-02 | 1981-05-20 | Kureha Chemical Ind Co Ltd | Method for producing spherical particles of carbon and of activated carbon |
| US4582859A (en) * | 1983-12-02 | 1986-04-15 | Rohm And Haas Company | Process for producing an expanded seed copolymer and product therefrom |
| EP0279027A2 (en) * | 1987-02-11 | 1988-08-24 | Degussa Aktiengesellschaft | Active carbon granulates and process for their preparation |
| EP0428868A2 (en) * | 1989-10-20 | 1991-05-29 | Ebara Corporation | Materials for removing suspended impurities |
| 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 |
-
1993
- 1993-09-17 DE DE4331586A patent/DE4331586C2/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2402901A1 (en) * | 1973-01-26 | 1974-08-01 | Coal Industry Patents Ltd | PROCESS FOR PRODUCING AGGLOMERATES FROM CARBON SUBSTANCES |
| DE2407887A1 (en) * | 1973-02-23 | 1974-08-29 | Coal Industry Patents Ltd | PROCESS FOR AGGLOMERATING AND FORMING CARBON MATERIAL |
| DE2932571B2 (en) * | 1978-08-11 | 1981-02-26 | Kureha Kagaku Kogyo K.K., Tokio | Process for the production of spherical carbon particles or spherical activated carbon particles |
| GB2061902A (en) * | 1979-11-02 | 1981-05-20 | Kureha Chemical Ind Co Ltd | Method for producing spherical particles of carbon and of activated carbon |
| US4582859A (en) * | 1983-12-02 | 1986-04-15 | Rohm And Haas Company | Process for producing an expanded seed copolymer and product therefrom |
| EP0279027A2 (en) * | 1987-02-11 | 1988-08-24 | Degussa Aktiengesellschaft | Active carbon granulates and process for their preparation |
| DE3704132A1 (en) * | 1987-02-11 | 1988-08-25 | Degussa | ACTIVATED CARBON GRANULES AND METHOD FOR THE PRODUCTION THEREOF |
| EP0428868A2 (en) * | 1989-10-20 | 1991-05-29 | Ebara Corporation | Materials for removing suspended impurities |
| 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 |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202008016506U1 (en) | 2008-11-14 | 2009-12-31 | BLüCHER GMBH | Adsorptive structures |
| DE102008058248A1 (en) | 2008-11-14 | 2010-05-20 | BLüCHER GMBH | Adsorptive moldings and their use |
| DE102008058249A1 (en) | 2008-11-14 | 2010-05-20 | BLüCHER GMBH | Adsorptive structures and their use |
| DE202008016507U1 (en) | 2008-11-14 | 2009-12-31 | BLüCHER GMBH | Adsorptive shaped bodies |
| DE102009044675A1 (en) * | 2009-11-27 | 2011-06-01 | Wolf Pvg Gmbh & Co. Kg | Filter material for odor- and pollutant filters, comprises an expanded absorbent filling, which comprises agglomerate, which is formed predominantly from absorbent particles, which are adhered with a binding agent |
| DE202010009494U1 (en) | 2010-02-15 | 2011-06-09 | Blücher GmbH, 40699 | Adsorptive structures with particle and / or aerosol filter function |
| DE202010009493U1 (en) | 2010-02-15 | 2011-04-07 | BLüCHER GMBH | Agglomerates of adsorbent particles |
| DE102010024989A1 (en) | 2010-02-15 | 2011-08-18 | Blücher GmbH, 40699 | Adsorptive structures with particle and / or aerosol filter function |
| DE102010024990A1 (en) | 2010-02-15 | 2011-08-18 | Blücher GmbH, 40699 | Adsorptive system, preferably based on agglomerate, useful in an adsorptive shaped body and a filter, comprises many adsorber particles exhibiting a first and a second particulate adsorption material and a binder support |
| WO2011098210A1 (en) | 2010-02-15 | 2011-08-18 | BLüCHER GMBH | Agglomerates of adsorber particles and methods for producing such adsorber particles |
| WO2011098211A1 (en) | 2010-02-15 | 2011-08-18 | BLüCHER GMBH | Adsorptive structures having a particle and/or aerosol filter function and method for producing such adsorptive structures |
| DE202012003179U1 (en) | 2011-09-30 | 2012-10-04 | BLüCHER GMBH | Sebst-bearing structures with adsorptive properties |
| WO2013045024A1 (en) | 2011-09-30 | 2013-04-04 | BLüCHER GMBH | Self-supporting structures having adsorptive properties |
| DE102012006272A1 (en) | 2011-09-30 | 2013-04-04 | BLüCHER GMBH | Self-supporting structures with adsorptive properties |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4331586A1 (en) | 1995-03-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: MHB FILTRATION GMBH + CO. KG, 40699 ERKRATH, DE |
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| 8381 | Inventor (new situation) |
Free format text: BLUECHER, HASSO VON, 40699 ERKRATH, DE RUITER, ERNEST DE, DR., 51381 LEVERKUSEN, DE |
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| 8327 | Change in the person/name/address of the patent owner |
Owner name: MANN + HUMMEL GMBH, 71638 LUDWIGSBURG, DE |
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| 8339 | Ceased/non-payment of the annual fee |