WO1988009770A1 - Corps autonomes de filtrage - Google Patents

Corps autonomes de filtrage Download PDF

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Publication number
WO1988009770A1
WO1988009770A1 PCT/DE1988/000296 DE8800296W WO8809770A1 WO 1988009770 A1 WO1988009770 A1 WO 1988009770A1 DE 8800296 W DE8800296 W DE 8800296W WO 8809770 A1 WO8809770 A1 WO 8809770A1
Authority
WO
WIPO (PCT)
Prior art keywords
particles
filter body
binder
activated carbon
body according
Prior art date
Application number
PCT/DE1988/000296
Other languages
German (de)
English (en)
Inventor
Erich Busch
Original Assignee
Erich Busch
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Erich Busch filed Critical Erich Busch
Publication of WO1988009770A1 publication Critical patent/WO1988009770A1/fr

Links

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
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2055—Carbonaceous material
    • B01D39/2058—Carbonaceous material the material being particulate
    • B01D39/2062—Bonded, e.g. activated carbon blocks
    • 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
    • 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
    • B01J20/28054—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 surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • 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
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/08—Special characteristics of binders
    • B01D2239/086—Binders between particles or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1241—Particle diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/125—Size distribution

Definitions

  • the invention relates to a self-supporting mechanically editable filter body for cleaning drinking water or comparable liquids in the flow, in particular for filters that are designed for connection to a tap water tap in the household, with particles of powdered activated carbon or a comparable adsorbent with a large specific surface area and particles a thermoplastic binder which have been bonded to the particles of the absorbent by application of heat and pressure.
  • filter bodies of the specified type e.g. B. DE -OS 15 17 298, DE-OS 31 05 887
  • a sufficiently high strength requires the use of a correspondingly high proportion of binder; however, this reduces the adsorption capacity in an undesirable manner.
  • the filter body in use must have a sufficiently long service life so that it only needs to be replaced at long intervals. Since part of the active surface of the activated carbon particles is occupied by the binder, high proportions of binder are also disadvantageous with regard to the service life.
  • the invention is based on the object of creating a mechanically firm and editable activated carbon filter body which also traps very small particles and nevertheless has a flow resistance for water and comparable liquids which is so low that it has an acceptably small size in filters is well suited for connection to water taps in the household.
  • this object is achieved with a filter body of the type specified at the outset, which is characterized in that the binder particles essentially have a bulbous shape which differs from the spherical shape and consist of a binder which, when heated, still remains in a transition temperature range shows a viscoelastic behavior, but becomes sufficiently sticky on the surface to bond with the activated carbon particles.
  • filter bodies according to the invention have a particularly favorable combination of low flow resistance and filter fineness, with good mechanical strength and easy workability.
  • the favorable properties of filter bodies according to the invention can be attributed to the fact that the bulbous particles of the binder fill the space between the activated carbon particles less completely than spherical binder particles, and that the visco-elastic properties of the binder. Melting of the binder on the activated carbon particles can be avoided during the manufacturing process, which is carried out under increasing temperature. It is therefore important that the inventive According to the filter body, the particles of the binder are still largely in their original bulbous form, ie they have not melted due to excessive heating during the manufacturing process.
  • Binders suitable for the purposes of the invention can be found in particular among polyethylenes. Because of its low price, its easy processability, its chemical inertness and its favorable mechanical and thermal properties, polyethylene is also advantageous in other ways.
  • the volume ratio of binder: activated carbon is preferably about 3: 7 to 7: 3. Sufficient strength and good filtration performance can easily be combined in this area. In practice, a volume ratio of about 1 is usually usable.
  • the filter body according to the invention preferably contains a stationary disinfectant such as silver. This prevents, in a known manner, the growth of germs in the interior of the filter body. It is particularly advantageous if silver powder is incorporated into the filter body as a disinfectant. Finely divided metallic silver has a desired antibacterial effect in tap water and is only very slowly consumed by the water flowing through, so that only a little silver is required.
  • a poorly soluble silver compound such as silver sulfide or silver chloride, can also be provided in the filter body in finely divided form as a decant.
  • silver compounds can have a longer service life than metallic silver.
  • the filter body according to the invention preferably has a porosity such that particles with a diameter down to 1 to 0.2 ⁇ m can be filtered off. This can be adjusted by appropriate selection of the particle sizes. It has been shown to be a particular advantage that, even with this very small pore size, the filter body still has a sufficiently low flow resistance in order to have dimensions that are acceptable in the household and with the operating pressures of z. B. 4 bar a sufficient for most applications flow of a few liters per minute.
  • the filter body according to the invention can be produced with little effort in a similar manner to previously known filter bodies of a similar composition, ..
  • a mixture of powdered activated carbon and powdered thermoplastic binder is pressed in a known manner "and heated for a time in such a way that the particles of the Connect the binder to the particles of the activated carbon and then cool it down again;
  • Produce filter bodies according to the invention if a powdery, ultra-high molecular thermoplastic material is used as the binding agent, which still exhibits viscoelastic behavior in a transition temperature range, but becomes sufficiently sticky on the surface to bond with the carbon particles and their particles have a bulbous shape deviating from the spherical shape, that the mixture is pressed and heated to a temperature in the transition temperature range, and that the pressing pressure, the temperature and the duration of the heating are chosen such that the binder particles after cooling adhere to the activated carbon particles while largely maintaining their shape.
  • the process according to the invention can be carried out just as easily as known similar processes, and in individual cases a few orienting tests are sufficient to achieve an optimal result with the binder and activated carbon materials present. It is helpful here that the temperature range in which the viscoelastic behavior is present is generally known for the binders in question. This applies in particular to particularly suitable binders from the group of low-pressure polyethylene with a molecular weight in the range 3 ... 7 « 10. Powdered material of this type, in which the particles have the desired bulbous shape, is commercially available, e.g. B. a particularly suitable powdery low-pressure polyethylene with a molecular weight of about 4.10, at which the transition temperature range can be between about 220 and 300 ° C. It is generally advantageous if relatively thick moldings are produced at higher temperatures than relatively thin moldings.
  • the desired filter fineness is set by appropriate selection of the particle size of the activated carbon.
  • the particle size of the binder can be in a wide range. In principle, activated carbon grades with average particle sizes in the range from approximately 1 ⁇ m to approximately 3 mm can be used. In the case already described that the filter body to be produced should also get back very small particles in the size range from 0.2 to 1 ⁇ m, an activated carbon is expediently used at about 20% by volume. have a particle size of approximately 1 ⁇ m.
  • the bulk density of the binder is often given instead of the particle size.
  • Commercially available grades of low-pressure polyethylene with a bulbous particle shape are grades with a bulk density of about 0.2 to 0.25
  • the filter body has a relatively small thickness, for example 0.5 to 2 cm and a diameter of for example 15 cm, and / or a relatively high content of activated carbon, for example, 50 vol 0th, is present, it may be expedient, wherein add a small amount of a strengthening agent, e.g. low molecular weight polyethylene, to the preparation.
  • a strengthening agent e.g. low molecular weight polyethylene
  • the figure explains the structure of the filter insert according to the invention in a schematic sectional illustration.
  • Particles 1 of a powdery adsorbent such as activated carbon are connected to one another by bulbous particles 2 of a thermoplastic binder to form a self-supporting mechanically processable filter body. Due to the pressure and temperature conditions used in the manufacture, the binder particles 2 are only attached to the active carbon particles 1 in relatively limited connection areas 3 without a substantial change in their original shape. Because of the bulbous shape of the binder particles 2, a comparatively large pore volume 4 results. The binder particles 2 are not melted and melted, so that larger areas of the activated carbon particles 1 are prevented from being sealed by binders.
  • Silver powder has been incorporated as a disinfectant.
  • Silver powder particles 5 are largely bound to the binder particles 2 during the manufacturing process.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Materials Engineering (AREA)
  • Geology (AREA)
  • Filtering Materials (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

Un corps autonome et usinable pour l'épuration de l'eau se compose de particules de charbon actif pulvérulent et de particules d'un liant thermoplastique reliées sous pression et sous l'effet de la chaleur aux particules de charbon actif. Les particules du liant ont une forme noduleuse, essentiellement non-sphérique et se composent d'une substance qui devient visqueuse et élastique lorsqu'elle est chauffée.
PCT/DE1988/000296 1987-06-09 1988-05-19 Corps autonomes de filtrage WO1988009770A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3719233.7 1987-06-09
DE19873719233 DE3719233A1 (de) 1987-06-09 1987-06-09 Selbsttragender filterkoerper

Publications (1)

Publication Number Publication Date
WO1988009770A1 true WO1988009770A1 (fr) 1988-12-15

Family

ID=6329340

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1988/000296 WO1988009770A1 (fr) 1987-06-09 1988-05-19 Corps autonomes de filtrage

Country Status (4)

Country Link
EP (1) EP0327603A1 (fr)
AU (1) AU1729888A (fr)
DE (1) DE3719233A1 (fr)
WO (1) WO1988009770A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0345381A2 (fr) * 1988-06-07 1989-12-13 The Clorox Company Filtre de liquide
GB2268173A (en) * 1992-06-30 1994-01-05 Thames Water Utilities Filter medium
DE19519616A1 (de) * 1995-05-29 1996-12-05 Marc Andreas De Ruiter Spezielle Form von Körpern mit adsorbierenden Eigenschaften und ihre mögliche Verbindung zu festen Gebilden
WO1998007495A1 (fr) * 1996-08-16 1998-02-26 Marcel Huder Filtre solide constitue de grains lies par resine

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226937A (en) * 1989-08-18 1993-07-13 Pall Corporation Void-containing sorbent pad
CA1337473C (fr) * 1989-08-18 1995-10-31 Staffan B. Linnersten Filtre compose d'un tampon absorbant a alveoles ouvertes
US5249948A (en) * 1991-04-08 1993-10-05 Koslow Technologies Corporation Apparatus for the continuous extrusion of solid articles
DE4211529A1 (de) * 1992-04-06 1993-10-07 Herding Entstaubung Filterelement mit einem formstabilen, durchlässig-porösen Kunststoff-Formkörper
DE4442713C2 (de) * 1994-12-01 1999-12-23 Freudenberg Carl Fa Adsorptions-Luftfilter und Verfahren zu dessen Herstellung
EP0829299A4 (fr) * 1995-05-26 1999-02-10 Hitachi Chemical Co Ltd Materiau pour purifier l'air ambiant
US7168574B2 (en) 1999-04-22 2007-01-30 King Technology Dual filter
US6446814B1 (en) 1999-04-22 2002-09-10 Joseph A. King Method of making a dual filter
CA2331084C (fr) * 2000-01-21 2011-10-25 King Technology, Inc. Traitement de l'eau
DE10117435B4 (de) * 2001-04-03 2006-01-12 Msa Auer Gmbh Verfahren zur Herstellung eines Filterkörpers
US7673757B2 (en) 2006-02-17 2010-03-09 Millipore Corporation Adsorbent filter media for removal of biological contaminants in process liquids
DE102009060573A1 (de) * 2009-12-23 2011-07-07 Alois Domme Verfahren zur Trockenbeschichtung von Körnern, Verfahren zur Herstellung zumindest eines Filterkörpers sowie gemäß diesem Verfahren hergestellter Filterkörper und Mischvorrichtung zum Trockenbeschichten von Körnern
DE102020116991B3 (de) 2020-06-29 2021-09-02 Franz Durst Atemluftfilter und Verfahren zum Betrieb eines Atemluftfilters

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061807A (en) * 1976-02-09 1977-12-06 Shaler Amos J Adsorbent body and method for making same
FR2354966A1 (fr) * 1976-06-15 1978-01-13 Hoechst Ag Agent absorbant pour l'epuration des eaux
DE2804154B1 (de) * 1978-01-31 1979-01-25 Bluecher Hasso Von Filtermaterial sowie Verfahren und Vorrichtung zu seiner Herstellung
US4344846A (en) * 1973-03-16 1982-08-17 Max Klein Filtration using expanded styrene-polymer and polyolefin micro-bits
EP0159696A2 (fr) * 1984-04-25 1985-10-30 Pall Corporation Structures autoportables contenant des particules de charbon immobilisées et méthode pour les former
EP0218348A1 (fr) * 1985-08-28 1987-04-15 Minnesota Mining And Manufacturing Company Appareils respiratoires utilisant des structures adsorbantes liées
EP0253132A1 (fr) * 1986-07-18 1988-01-20 Michael Busch Filtre pour l'eau du robinet

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL167609C (nl) * 1971-06-07 1982-01-18 Norit Nv Werkwijze voor het vervaardigen van poreuze voorwerpen van met een bindmiddel gebonden korrels actieve kool.
DE2656465A1 (de) * 1976-12-14 1978-06-15 Gehrig Joseph Dr Verfahren zur entkeimung von fluessigkeiten

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4344846A (en) * 1973-03-16 1982-08-17 Max Klein Filtration using expanded styrene-polymer and polyolefin micro-bits
US4061807A (en) * 1976-02-09 1977-12-06 Shaler Amos J Adsorbent body and method for making same
FR2354966A1 (fr) * 1976-06-15 1978-01-13 Hoechst Ag Agent absorbant pour l'epuration des eaux
DE2804154B1 (de) * 1978-01-31 1979-01-25 Bluecher Hasso Von Filtermaterial sowie Verfahren und Vorrichtung zu seiner Herstellung
EP0159696A2 (fr) * 1984-04-25 1985-10-30 Pall Corporation Structures autoportables contenant des particules de charbon immobilisées et méthode pour les former
EP0218348A1 (fr) * 1985-08-28 1987-04-15 Minnesota Mining And Manufacturing Company Appareils respiratoires utilisant des structures adsorbantes liées
EP0253132A1 (fr) * 1986-07-18 1988-01-20 Michael Busch Filtre pour l'eau du robinet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0345381A2 (fr) * 1988-06-07 1989-12-13 The Clorox Company Filtre de liquide
EP0345381A3 (fr) * 1988-06-07 1991-04-10 The Clorox Company Filtre de liquide
GB2268173A (en) * 1992-06-30 1994-01-05 Thames Water Utilities Filter medium
DE19519616A1 (de) * 1995-05-29 1996-12-05 Marc Andreas De Ruiter Spezielle Form von Körpern mit adsorbierenden Eigenschaften und ihre mögliche Verbindung zu festen Gebilden
WO1998007495A1 (fr) * 1996-08-16 1998-02-26 Marcel Huder Filtre solide constitue de grains lies par resine

Also Published As

Publication number Publication date
AU1729888A (en) 1989-01-04
DE3719233A1 (de) 1988-12-22
EP0327603A1 (fr) 1989-08-16

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