EP0751822A1 - Filtre, materiau de filtrage et procede de production d'un materiau de filtrage utile pour adsorber des gaz - Google Patents

Filtre, materiau de filtrage et procede de production d'un materiau de filtrage utile pour adsorber des gaz

Info

Publication number
EP0751822A1
EP0751822A1 EP95913051A EP95913051A EP0751822A1 EP 0751822 A1 EP0751822 A1 EP 0751822A1 EP 95913051 A EP95913051 A EP 95913051A EP 95913051 A EP95913051 A EP 95913051A EP 0751822 A1 EP0751822 A1 EP 0751822A1
Authority
EP
European Patent Office
Prior art keywords
filter material
solution
granules
activated carbon
metal oxide
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Withdrawn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
EP95913051A
Other languages
German (de)
English (en)
Inventor
Paul J. M. Haufe
Egbert Brandau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haufe Paul JM
Original Assignee
Haufe Paul JM
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 Haufe Paul JM filed Critical Haufe Paul JM
Publication of EP0751822A1 publication Critical patent/EP0751822A1/fr
Withdrawn legal-status Critical Current

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
    • B01J20/02—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

Definitions

  • Filter Filter material and method for producing a filter material for
  • the invention relates to a filter material for the adsorption of in particular polar and non-polar gases such as hydrocarbon compounds, sulfur dioxide or nitrous gases (NO x ), the filter material comprising a granulate which at least partially contains activated carbon. Furthermore, the invention relates to the use of the filter material in a filter for the adsorption of in particular polar and non-polar gases such as hydrocarbon compounds or sulfur dioxide with a filter material which at least partially contains activated carbon. Finally, the invention relates to a method for producing a filter material consisting of a granulate for the adsorption of polar and non-polar gases using activated carbon or other substances forming pores and inner surfaces.
  • polar and non-polar gases such as hydrocarbon compounds, sulfur dioxide or nitrous gases (NO x )
  • Volatile hydrocarbon compounds e.g. in companies where solvents or gases are used, or e.g. Adsorbing sulfur-containing gases from exhaust air systems originating from incineration plants or rooms, filter materials can be used which have activated carbon in a wide variety of variants as adsorbent material.
  • the filters used are often disposable filters, i.e. they have to be disposed of after loading with the gases to be adsorbed, e.g. through incineration, be it through final storage. Desorption of the adsorbed gases with e.g. Water vapor is indeed possible, but this creates secondary waste (secondary waste) which has to be disposed of again.
  • the present invention is based on the problem of providing a filter, a filter material intended therefor and a method for producing such a filter to provide, with which a high adsorption rate for nitrous gases and sulfur dioxide in particular is possible without the need for expensive disposal or large amounts of secondary waste.
  • the problem is solved with a filter material which contains a heterogeneous mixture of activated carbon granules and at least one metal oxide granulate or a homogeneous granulate consisting of activated carbon and metal oxide.
  • a combination of a commercially available granulated activated carbon with granules of metal oxides with a high specific surface area and a larger pore volume is proposed, which results in a high adsorption capacity for in particular volatile hydrocarbon compounds, but also for gases such as sulfur dioxide and nitrogen oxides.
  • Particularly suitable metal oxides are oxides of aluminum, titanium, silicon, magnesium and mixed oxides which have small proportions of other metal oxides of the second, third and fourth subgroups of the periodic table.
  • the filter material contains, in addition to the metal oxide (s) and activated carbon, additional carbides of silicon and / or titanium and / or boron, layered silicates and boron nitride, so that good adsorption capacity for polar and non-polar inorganic and organic gases and vapors results.
  • the diameter of the individual granules should preferably be between 0.8 and 8 mm. Furthermore, a specific surface area of 100 to 1,000 m 2 / g and a pore volume of 0.2 to 1.2 ml / g are of particular advantage.
  • urea can be added to a solution or a sol from which the granulate is produced.
  • the gas-laden discharged air stream can then be fed to a catalytic combustion device and oxidized there.
  • regeneration is made possible by adding the transition metal oxides necessary for catalytic combustion to the filter granulate, so that the filter material contains not only the adsorption properties but also the catalysts required for catalytic combustion.
  • a filter for the adsorption of, in particular, polar and non-polar gases such as hydrocarbon compounds or sulfur dioxide with a filter material which at least partially contains activated carbon is characterized in that the filter is built up in layers of active granules and granules of metal oxide or of homogeneous ge mixed granules, which in addition to activated carbon also contain metal oxides.
  • a method for producing a granulate for the adsorption of polar and non-polar gases using activated carbon is characterized in that at least one metal oxide powder and. Dispersed and finely distributed in a solution of pre-neutralized aluminum chloride or nitrate and at least one binder / or activated carbon to form an initial dispersion, the initial dispersion being dripped, the drops thus formed being pre-solidified by blowing with ammonia gas and then collected in an ammonia solution, dried and calcined.
  • Layer silicates and / or boron nitride and / or silicon carbide and / or titanium carbide and / or boron carbide can also be added to the solution to form the starting dispersion.
  • pore formers such as ureas can be added to the solution.
  • the filter material not only to adsorb, but also to regenerate the adsorbed gases at the same time by adding transition metal oxides to the solution to form the starting solution in order to enable catalytic combustion of the adsorbed gases.
  • An AICI3 solution is blunted with ammonia and mixed with 20% by weight activated carbon.
  • the mixture is dispersed with the addition of 2% by weight of polyvinyl alcohol.
  • This homogeneous mixture is dropped into microspheres by means of a vibration dropping process.
  • the spherical drops formed are preconsolidated using ammonia gas and then collected in an ammonia solution, further solidified, then washed, dried and calcined at 450 ° C.
  • Granules are obtained which have a BET surface area of 450 m 2 / g and a pore volume of 0.75 ml / g.
  • Example 3 An A1 (N03) 3 solution with an Al 2 O 3 equivalent content of 22% by weight is mixed with 15% by weight of activated carbon, 1% by weight of polyvinyl alcohol and 7% by weight of urea and dispersed for homogeneity.
  • the granules obtained by dropping and further processing as in Example 1 have a BET surface area of 590 m 2 / g and a pore volume of 1.17 ml / g.
  • Example 2 A mixture as in Example 2, but with 23% by weight of activated carbon and 8.5% by weight of urea, is also dripped into microspheres and calcined at 350 ° C. Granules with a BET surface area of 920 m 2 / g and a pore volume of 1.2 ml / g are obtained.
  • a sodium silicate solution (water glass) with a ratio of sodium ions to silications of 60:40 and an equivalent solids content of 16% by weight of SiO 2 is mixed homogeneously with 2% by weight of boron cabide powder and vibration-dripped analogously to Example 1.
  • the pre-consolidation in the gas phase is carried out with SO 2 gas and the further pre-consolidation in sulfuric acid solution.
  • Example 2 A solution as in Example 2 is mixed with 12% by weight of layered silicate instead of activated carbon in order to produce granules in the same way. This results in a BET surface area of 350 m 2 / g and a pore volume of 0.85 ml / g.
  • Example 4 The batch from Example 4 is mixed with 7% by weight SiC instead of the boron carbide and the homogenized dispersion is vibration-dripped. After calcination at 450 ° C., a BET surface area of 390 m 2 / g and a pore volume of 0.78 ml / g are measured on the granules.
  • Example 1 The dispersion of Example 1 is also prepared and processed with SiC (6% by weight) instead of the activated carbon.
  • the granules obtained have a BET surface area of 250 m 2 / g and a pore volume of 0.68 ml / g.
  • Example 2 In the dispersion of Example 2, the activated carbon is replaced by 10% by weight boron nitride.
  • the granules obtained have a BET surface area of 490 m 2 / g and a pore volume of 0.7 ml / g.
  • Example 2 In the dispersion of Example 2 an additional 7% by weight boron nitride is added. After calcination at 520 ° C., the granules obtained have a BET surface area of 625 m 2 / g and a pore volume of 0.92 ml / g.
  • Example 9 The dispersion of Example 9 is processed in the same way. However, the calcination temperature is 650 ° C. The BET surface area of the granules is 310 m 2 / g and the pore volume is 0.54 ml / g.
  • Example 2 The dispersion of Example 2 is mixed with 9% by weight boron carbide and processed into microspheres as in Example 2 without the addition of activated carbon. The calcination takes place at 500 ° C. The resulting BET surface area is 360 m 2 / g and the pore volume is 0.65 ml / g.
  • the sodium silicate solution of Example 4 is mixed with 10% by weight boron nitride and vibration-dripped into granules.
  • the calcination at 520 ° C. leads to granules with a pore volume of 0.8 ml / g and a BET surface area of 290 m 2 / g.
  • the sodium asilicate solution from Example 4 is mixed with 12% by weight of layered silicate and vibrationally dripped into microspheres.
  • the calcination at 450 ° C gives solid grains with a BET surface area of 420 m ⁇ / g and a pore volume of 0.7 ml / g.
  • Example 2 5% by weight of boron nitride and 5% by weight of boron carbide are additionally added to the solution of Example 2.
  • the microspheres obtained are calcined at 500 ° C.
  • the BET surface area is 430 m 2 / g and the pore volume is 0.9 ml / g.
  • Example 2 6% by weight of SiC and 6% by weight of layered silicate are additionally added to the solution of Example 2 and the microspheres obtained are calcined at 500 ° C.
  • the BET surface area is 490 m ⁇ / g and the pore volume is 0.85 ml / g.
  • a solution with titanium nitrate is treated analogously to example 2.
  • Microbeads with a BET surface area of 240 m 2 / g and a pore volume of 0.55 ml / g are obtained.
  • a solution of magnesium chloride is treated as in Example 1. Granules with BET surface areas of 230 m 2 / g and a pore volume of 0.6 ml / g are obtained.
  • Example 2 The homogeneous dispersion of Example 2 is mixed with transition metal oxides as described in DE-43 20 795 in order to also produce granules. These show a BET surface area of 250 to 350 m 2 / g and a pore volume of 0.4-0.9 ml / g.
  • Example 4 The dispersion of Example 4 is treated analogously to Example 18 in order to obtain filter granules with a BET surface area of 250-420 m 2 / g and a pore volume of 0.5-0.9 ml / g.
  • the filter granules produced according to the examples are taken up in a suitable container.
  • the container is provided on at least two sides with a gas-permeable membrane or a grid to allow contaminated gas or air to flow in and the cleaned gas or air to flow out.
  • test gases or vapors toluene, SO2, n-butane and NO x . flow over the filter material at a flow rate of 0.6 m / s. Each gas works for 15 minutes. on.
  • the relative humidity is 45 + 5% and the temperature is 20 ⁇ 2 ° C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)

Abstract

Un matériau de filtrage, notamment de gaz polaires et non polaires, tels que composés hydrocarbures, dioxyde de soufre et/ou gaz nitreux, est constitué d'un matériau granulé qui contient au moins partiellement du charbon actif. Afin d'atteindre un haut degré d'adsorption, le matériau de filtrage contient un mélange hétérogène de charbon actif granulé et d'au moins un oxyde métallique granulé ou un matériau granulé à base de charbon actif qui contient au moins un oxyde métallique.
EP95913051A 1994-03-24 1995-03-23 Filtre, materiau de filtrage et procede de production d'un materiau de filtrage utile pour adsorber des gaz Withdrawn EP0751822A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944410142 DE4410142A1 (de) 1994-03-24 1994-03-24 Filter, Filtermaterial sowie Verfahren zur Herstellung eines Filtermaterials zur Adsorption von Gasen
DE4410142 1994-03-24
PCT/DE1995/000404 WO1995025587A1 (fr) 1994-03-24 1995-03-23 Filtre, materiau de filtrage et procede de production d'un materiau de filtrage utile pour adsorber des gaz

Publications (1)

Publication Number Publication Date
EP0751822A1 true EP0751822A1 (fr) 1997-01-08

Family

ID=6513683

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95913051A Withdrawn EP0751822A1 (fr) 1994-03-24 1995-03-23 Filtre, materiau de filtrage et procede de production d'un materiau de filtrage utile pour adsorber des gaz

Country Status (3)

Country Link
EP (1) EP0751822A1 (fr)
DE (1) DE4410142A1 (fr)
WO (1) WO1995025587A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7276162B2 (en) 2001-09-10 2007-10-02 The Procter & Gamble Co. Removal of contaminants from a lipophilic fluid
US20030047513A1 (en) * 2001-09-10 2003-03-13 The Procter & Gamble Company Removal of contaminants from a lipophilic fluid
US6919029B2 (en) * 2002-02-14 2005-07-19 Trustees Of Stevens Institute Of Technology Methods of preparing a surface-activated titanium oxide product and of using same in water treatment processes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1539735A (en) * 1975-06-13 1979-01-31 Ici Ltd Adsorbent material
DE3628858A1 (de) * 1986-08-25 1988-03-10 Burger Manfred R Verfahren und vorrichtung zur reinigung von mit toxischen gasen belasteter luft
US4795735A (en) * 1986-09-25 1989-01-03 Aluminum Company Of America Activated carbon/alumina composite
DE3704131A1 (de) * 1987-02-11 1988-08-25 Degussa Aktivkohlegranulate sowie verfahren zu ihrer herstellung
JPH0620548B2 (ja) * 1988-05-23 1994-03-23 水澤化学工業株式会社 複合吸着剤
DE4216867A1 (de) * 1992-05-22 1993-11-25 Solvay Catalysts Gmbh Sorption von organischen Verbindungen aus Gasen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9525587A1 *

Also Published As

Publication number Publication date
WO1995025587A1 (fr) 1995-09-28
DE4410142A1 (de) 1995-09-28

Similar Documents

Publication Publication Date Title
DE69418671T2 (de) Verfahren zur Herstellung von Körpern mit imprägnierten Poren
DE69320451T2 (de) Mit Kohlenstoff überzogene inorganische Substrate
DE69608718T2 (de) Stickstoff enthaltendes Kohlenstoffmolekularsieb, Verfahren zur Herstellung und Verwendung
DE69903410T2 (de) Entkarbonisierung von gasen unter verwendung von zeolithischen adsorptionsmitteln
DE10015696A1 (de) Katalysator für die Entfernung von Stickoxiden auf Basis von Titansäulen gestütztem Ton, der mit Vanadium imprägniert ist
EP2249961A1 (fr) Granulé formant agent d'adsorption et procédé pour sa fabrication
EP1985360B1 (fr) Procédé de fabrication de coke de lignite doté avec de soufre élémentaire
DE4216867A1 (de) Sorption von organischen Verbindungen aus Gasen
DE2626548A1 (de) Adsorbensmaterial
DE2912269C2 (fr)
WO2011128073A2 (fr) Utilisation de granulés minéraux naturels comme adsorbeurs de gaz pour l'élimination de composants toxiques gazeux
EP0751822A1 (fr) Filtre, materiau de filtrage et procede de production d'un materiau de filtrage utile pour adsorber des gaz
DE69801028T2 (de) Adsorbens
EP0729377B1 (fr) Sorption simultanee d'eau et de composes organiques
EP2043763B1 (fr) Matériau de filtrage adsorbant
US20050090380A1 (en) Process for the preparation of molecular sieve adsorbent for selective adsorption of oxygen from air
DE2411853A1 (de) Verfahren zur katalytischen reduktion von stickstoffoxyden
EP0245652B1 (fr) Procédé pour purifier des gaz d'échappement
EP0178698B1 (fr) Dispositif d'épuration des gaz d'échappement
DE68923930T2 (de) Peptisierte aktivierte Kohlenstoff-/Aluminiumoxid-Zusammenstellung.
EP1062021B1 (fr) Procede pour recuperer et/ou eliminer des composes organiques contenus dans des flux gazeux
EP3927448B1 (fr) Milieu filtrant servant à la séparation d'oxydes d'azote
DE2449845A1 (de) Stoffe und verfahren zur reinigung von nitrosen gasen
Inouye et al. The Adsorption of NO and SO2 on Synthetic Jarosites
CA2191796A1 (fr) Purification d'air dans des espaces clos

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19961022

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19970326

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19980317