DE102006031311A1 - Air drier, useful in air brake system of vehicles, comprises a drying agent comprising a metal-organic framework, where the metal is a transition metal, which is linked with at least a bidentate linker - Google Patents

Air drier, useful in air brake system of vehicles, comprises a drying agent comprising a metal-organic framework, where the metal is a transition metal, which is linked with at least a bidentate linker

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Publication number
DE102006031311A1
DE102006031311A1 DE200610031311 DE102006031311A DE102006031311A1 DE 102006031311 A1 DE102006031311 A1 DE 102006031311A1 DE 200610031311 DE200610031311 DE 200610031311 DE 102006031311 A DE102006031311 A DE 102006031311A DE 102006031311 A1 DE102006031311 A1 DE 102006031311A1
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zn
bdc
dmf
air dryer
characterized
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DE200610031311
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German (de)
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Sven Dr. Siegle
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Mahle International GmbH
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Mahle International GmbH
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Priority to DE200610031311 priority Critical patent/DE102006031311A1/en
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Application status is Pending legal-status Critical

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/26Drying gases or vapours
    • B01D53/28Selection of materials for use as drying agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/26Drying gases or vapours
    • B01D53/261Drying gases or vapours by adsorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/223Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material containing metals, e.g. organo-metallic compounds, coordination complexes
    • B01J20/226Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30Processes for preparing, regenerating, or reactivating
    • B01J20/32Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3242Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
    • B01J20/3244Non-macromolecular compounds
    • B01J20/3265Non-macromolecular compounds with an organic functional group containing a metal, e.g. a metal affinity ligand
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/20Organic adsorbents
    • B01D2253/204Metal organic frameworks (MOF's)

Abstract

The The invention relates to an air dryer comprising a drying material wherein the drying material is an organometallic framework material (MOF), whose metals from the group of transition metals selected and whose linkers are at least bidentate linkers.

Description

  • The The present invention relates to an air dryer, in particular used in compressed air brake systems of vehicles.
  • humidity Air in air brake systems is u.a. because of the danger of freezing and the corrosion extremely dangerous. For this reason, had the air tanks of the first air brake systems regularly drained and additionally Antifreeze pumps are provided.
  • In the meantime, did you go over to that to dry the sucked air so far that it is strong even Cooling no more moisture.
  • The Coming from the compressor air initially cools on Pressure regulator and the air dryer off and losing it already moisture through condensation. In the air dryer, it is then over Desiccant passes, which binds the more water vapor, the higher the Pressure and the lower the temperature is. After reaching the switch-off pressure in the pressure regulator is stored in a separate small air tank small part of the compressed air at low pressure back through the desiccant and then led into the open.
  • air dryer for the Use in air brake systems must be over a range of ambient temperature of the vehicle from -40 ° C to 120 ° C, at least however, from -30 ° C to 80 ° C, an effective Drying of the air, and they must be especially at a relative humidity up to 100% work reliably.
  • Of the Working pressure of the air dryer is typically max. 15 bar, the working temperature of the air dryer is approx. 80 ° C. In general lies the volume flow to be dried at approx. 1,000 liters of air / min. The The pressure dew point of the air dryer must be at least 30 ° C.
  • The Air drying takes place in the air dryer by means of drying materials. The drying materials are generally powdery or particulate Particles with a high surface area and good water absorption capacity. As a result of the desired Regeneration of the drying material by means of compressed air must be However, the absorbed water from the drying material again can be removed quickly and easily, i. the absorption and Desorption of water must be reversible and sorption rates have to be high.
  • After this the effective rate of desorption and desorption also from the Particle size should depend no significant change the particle sizes take place, i.e. The drying material should be both abrasion resistant and do not clump together. Also required is a water intake of at least 10% by weight, preferably at least 15% by weight, and especially preferably at least 20% by weight of the total weight of the drying material.
  • In recent years, the literature has described novel metalorganic framework (MOF) structures that have been investigated for their synthesis, structure, catalytic properties, and their suitability for gas storage, in particular methane, natural gas, and hydrogen ( Schliche, Kratzke, Kaksel "Improved synthesis, thermal stability and catalytic properties of the metal-organic framework compound Cu3 (BTC) 2" in "Microporous and Mesoporous Materials" (2004), 73, 81-88 ; S. Kaskel "Pores on a Construction Kit" in "Nachrichten aus der Chemie" (2005), 53, p. 394 ff. ; US 2003/0148165 A1 ; WO 02/070526 A1 ; US 6,893,564 62 ; Yaghi et al "Construction of solid solids from hydrogen-bonded metal complexes of 1,3,5-benzenetricarboxylic acid" in J. Am. Chem. Soc. (1996), 118, pp. 9096 et seq .; "Synthetic Strategies, Structure Patterns and emerging properties in the chemistry of modular porous solids "in Acc. Chem. Res. 1998 (31) 474 ).
  • So far For the drying of air, synthetically produced zeolites or silica gel used. These are characterized by a relatively high water absorption capacity.
  • adversely at the zeolites is the during the Wear occurring in use, in particular when used as a pouring ball find in air dryers. Already as a result of abrasion-related reduction the sphere surface increases the absorption rate. The resulting from the abrasion Dust also clumps in the presence of moisture and sticks / clumps additional zeolite particles with each other. The size and shape of the zeolite particles is thereby significantly changed. After with irregular larger agglomerates as a result of the longer mean distance of a water molecule during the desorption / desorption sorption rates In the end, the required effective and reversible air drying can decrease no longer guaranteed become.
  • The by the abrasion resulting zeolite powder has another Disadvantage, because the fine powder dust enters the brake system and can become a complete one there disorder to lead. adversely on the synthetic zeolites is still the costly and thus costly production and limiting the water absorption capacity about 20% by weight.
  • The Object of the present invention is therefore an air dryer suggest that shows the required drying capacity, with Can regenerate compressed air, which is largely resistant to abrasion and not clumped and also economical can be produced.
  • Amazingly, was found to be more effective and cost effective Air dryer for compressed air brake systems can be prepared when this as drying materials MOFs (organometallic frameworks) comprising metals from the group the transition metals, in particular the VIIIa, Ia and IIa subgroup are selected and their linker at least bidentate, i. at least bidentate linker are.
  • Preferably, the metals are Cu, Zn, Co or Ni and the at least bidentate linkers are from the group of benzenetricarboxylate (BTC), p-benzenedicarboxylate (p-BDC), m-benzenedicarboxylate (m-BDC), 1,4-dicarboxylate-2 bromobenzene (Br-BDC), tetramethyl terephthalate (TMBDC), tetrafluoroterephthalate (TFBDC), naphthalene-2,6-dicarboxylate (NDC), 2-diazobicyclo [2.2.2.] octane (DABCO), biphenyl dicarboxylate (BPDC), Triphenyldicarboxylate (TPDC), benzene-1,3,5-tribenzoate (BTB), 4,4'-bipyridine, adamantane-1,3,5-tricarboxylate (ATC), trans-1,2-bis (4-pyridyl) ethylene (biphenyl), 2-amino-1,4-benzenedicarboxylate (ABDC), 2,3,5,6-tetramethyl-1,4-benzenedicarboxylate (TBDC), 2,5-dihydroxybenzoic acid (HDHBC), N-pyridylnicotinamide ( PNA), pyrazine-2,3-dicarboxylate (PZDC), 1,12-dodecanedinitrile (DDN), 1,4-bis (4-pyridyl) benzene, 9,10-bis (4-pyridyl) anthracene, 4,4 'Bis (4-pyridyl) biphenyl, azodibenzoate (ADB), cis, cis-1,3,5-cyclohexanetricarboxylate (CTC), 2,5-dimethylpyrazine (DMPYZ), 2,4,6-tri (4-pyridyl ) -1,3,5-triazine (TPT), acetylenedica rboxylate (ADC), methane tetrabenzoate (MTB). Preferably, the pore volumes of the MOFs are at least 0.1 cm 3 / g and the specific surface areas at least 50 m 2 / g.
  • Examples of the MOFs to be used as the drying materials in the present invention are Cu 3 (BTC) 2 , [Zn 2 (1,4-BDC) 2 - (DABCO)], [Zn 2 (1,4-BDC) (TMBDC) - (DABCO)] , [Zn 2 (1,4-NDC) 2 (DABCO)], [Zn 2 (TFBDC) 2 - (DABCO)], [Zn 2 (TMBDC) 2 (BPY)], Cu 3 (BTB) 3 , [ Zn (BDC) · (DMF) (H 2 O)], Zn (ABDC) (DMF) · (C 5 H 5 Cl) 0.25 , Zn 2 (TBDC) 2 (H 2 O) 1.5 (DMF ) 0.5 x (DMF) (H 2 O), Co 3 (BTC) 2 x 12H 2 O, Ni 3 (BTC) 2 x 12H 2 O, Zn 3 (BTC) 2 x 12H 2 O, [Cu ( DHBC) 2 (4,4'-BPY)] .H 2 O, [Co (NCS) 2 (3-PNA) 2 ] n , {[Ag (DDN) 2 ]. NO 3 } n , {[Zn 3 (OH) 2 (BPDC) 2 · DEF · 2H 2 O} n (DEF = N, N'-diethylformamide), [Cu (1,4-BDC) (4,4'-BPY) 0.5 ] n , {[Zn 4 O (1,4-BDC) 3 ] · DMF · C 6 H 5 Cl} n , [Cu (1,4-BDC) (4,4'-BPY) 0.5 ] n , {[ Cu 2 (o-Br-1,4-BDC) 2 (H 2 O) 2 ] x 8 DMF x 2H 2 O} n , {[Cu 24 (1,3-BDC) 24 (DMF) 14 (H 2 O) 10 ] × 50H 2 O × 6DMF × 6EtOH} n , [{Cu (4,4'-BPY) 1.5 ] × NO 3 × 1.5H 2 O} n , {[Zn (1,4-) BDC)] · DMF · H 2 O} n , {[Zn 3 (1,4-BDC) 3 ] · 6MeOH} n , {[Zn 2 (1,3,5-BTC) (NO 3 )] · 5EtOH · H 2 O) n , {[Zn (1,4-BDC) (H 2 O) · DMF} n , Zn 2 (BTC) (NO 3 ) · H 2 O (C 2 H 5 OH) 5 , Zn 2 (crotonate) 4 (quinoline) 2 , Zn 3 (crotonate) 6 (quinoline) 2 , Cd (ATC) · [Cd (H 2 O) 6 ] (H 2 O) 5 , Zn 2 (ATB) (H 2 O) · (H 2 O) 3 (DMF) 3 , Ni 2 (ATC) ( H 2 O) 4 · (H 2 O) 4 , Zn 2 (ATC) · (C 2 H 5 OH) 2 (H 2 O) 2 , Zn 2 (MTB) (H 2 O) 2 · (DMF) 6 (H 2 O) 5 , Zn 3 O (HBTB) 2 (H 2 O) x (DMF) 0.5 (H 2 O) 3 , Zn 2 (BTC) (NO 3 ) x (H 2 O) O , 5 (C 2 H 5 OH) and Zn 2 (BTC) (NO 3 ). (H 2 O) 0.5 (C 2 H 5 OH) 0.5 (DMF) 2.5 .
  • These MOFs are characterized by reversible, sufficiently fast water adsorption and water desorption, over a range of temperatures from -40 ° C to 120 ° C and at a pressure of at least 1 to over 15 bar. Furthermore, it is possible the adsorbed water by introducing air, preferably below a low pressure, again remove what the MOFs as drying materials makes it suitable in automatic air dryers.
  • The Water absorption capacity of the MOFs at least 20% by weight.
  • Of these compounds, preference is given to metal complexes with benzene tricarboxylate as linker, in particular networks of the formula M 3 (BTC) 2 , preferably with a water of crystallization, where M is a transition metal and in particular Cu, Co, Ni or Zn.
  • Particularly preferred is Cu 3 (BTC) 2 (with BTC = benzene-1,3,5-tricarboxylate), which is characterized by a high specific pore volume of 0.41 cm 3 / g, a pore diameter of about 1.07 nm ( Harvath-Kawazoe), a high water absorption capacity, high desorption rates and in particular a simple and inexpensive production is characterized.
  • Compared to zeolites whose production requires high temperatures and an ion exchange step, the Cu 3 (BTC) 2 can be treated by treating a mixture of copper nitrate solution with an ethanolic benzene-1,3,5-tricarboxylic acid solution in an autoclave at 393 K over a period of 12 Hours, as in Schlichte et al "Microporous and Mesoporous Materials", 73, (2004) 81ff described.
  • Similarly, other M 3 (BTC) 2 compounds, such as M = Co, Ni, Zn, can also be synthesized, such as in J. Am. Chem. Soc. 118, (1996), 9096 described.
  • The Air dryer according to the invention can they MOFs as bulk material comprise, in particular in the form of a ball bed, wherein the individual Particle an approximately uniformly large spherical shape should own.
  • The MOFs are characterized by abrasion resistance even with ball fill, i.e. the formation of powder dust, which leads to disturbances of the brake system is avoided. Also, the clumping tendency is when using the MOFs according to the invention low.
  • Furthermore, the MOFs have a higher water absorption capacity than the zeolites. Another advantage of the MOFs is that a color change occurs when activated. Thus, for example, Cu 3 (BTC) 2 is turquoise-blue in the wet state and dark blue / violet in the dry state, so that the state of the drying agent can be visually checked.
  • Of course, there is also the possibility the MOFs on a carrier material to fix. As carrier materials can For example, web materials, in particular nonwovens comprehensive materials, be used. It is particularly preferred that this is the air-drying materials according to the invention comprehensive web material, in particular nonwoven, in an air dryer spirally wound up for an air flow in the direction of the spiral axis can be introduced. The fixation of the drying materials can be done for example by gluing. Also, the Drying material particles, for example sandwiched between two fleece discs be fixed.
  • at the application on a carrier material The particle size of the drying materials should be below 1.0 mm, preferably less than 0.5 mm, and more preferably below 0.1 mm to both an effective drying and a to achieve effective regeneration.
  • Preferably the particles should also be substantially spherical, especially if they are in the form of ball piles be used. In this form of use, the balls should about 1-2 mm diameter.
  • Natural zeolites such as clinopilolite have internal surface areas of approximately 360 m 2 / g, well below the value for Cu 3 BTC 2 . Other MOFs still show significantly higher surface areas, such as MOF-5 with a surface area of 2900 m 2 / g or MOF-177 with 4500 m 2 / g ( "Pores on a Construction Kit", S.Kaskel, Nachrichten der Chemie 53, April 2005, page 394 ). Surfaces of synthetically produced zeolites vary widely. However, the most commonly used industrial zeolite, zeolite 4A, has a surface area of 1560 m 2 / g according to the IZA (International Zeolite Association) database.
  • The Invention will be described below with reference to exemplary embodiments and comparative experiments described.
  • 1. Qualitative description of the clumping experiments:
  • A defined amount of natural zeolite powder and Cu 3 (BTC) 2 (5 g each) were added to a Petri dish and treated dropwise with 5 ml of water. It was observed that the zeolite powder completely absorbs the water, much like a sponge, whereas the Cu 3 (BTC) 2 does not mix with the water.
  • Subsequently were the samples are dried in a drying oven at 110 ° C for 2 hours.
  • The result shows that Cu 3 (BTC) 2 is approximately unchanged, whereas the zeolite powder has formed a solid agglomerate.
  • 2. Comparison of adsorption
  • To determine the adsorption, Cu 3 (BTC) 2 samples were first dried at 200 ° C. Subsequently, the samples were placed in a vessel filled with water and closed and the weight gain was measured every two minutes with an analytical balance. 1 shows the result of the experiment. The water adsorption is completely reversible, the sample has reached its original weight after about 5 hours, the water absorption is about 40% of the total weight. Thus, the material fulfills an important feature for the application in the air dryer, since a regeneration of the material during operation is inevitable. A material that can not be regenerated could only be used once and would therefore be unsuitable.
  • 3. Comparison of desorption
  • For the desorption measurements the samples were first 24 hours in a water-filled room Desiccator conditioned. The samples were then combined in a Analytical balance with built-in halogen lamp heated for 15 minutes at 200 ° C, wherein the weight loss per unit of time automatically by the Device registered has been.
  • The desorption measurements on the most preferred MOF Cu 3 (BTC) 2 are in comparison to the desorption measurements on synthetic and natural zeolite in 2 shown.
  • 2 shows the water desorption of Cu 3 (BTC) 2 , natural zeolite clinopliolite and 4A zeolite from UOP. The dry beads were first ground to ensure comparability of the results. Since the dry beads were added during the manufacturing process with a binder, a decrease in the desorption capacity must be considered. However, a direct comparison is provided by the data of the untreated natural zeolite. The weight loss of Cu 3 (BTC) 2 is almost 40% compared to 20% weight loss for the zeolite.
  • MOF thus show a low tendency to agglomerate and provide thus an alternative to industrially applied zeolite. A possible condensation of water in the air dryer cartridge Although here is also a problem, the functionality but can be restored here because a clumping does not takes place.

Claims (14)

  1. An air dryer comprising a drying material, characterized in that the drying material comprises an organometallic framework (MOF) whose metals are selected from the group of transition metals and whose linkers are at least bidentate linkers.
  2. Air dryer according to claim 1, characterized in that the metals from the group of subgroup elements the VIII, I or II group are selected and in particular Co, Ni, Cu or Zn are.
  3. Air dryer according to claim 1 or 2, characterized in that the at least bidentate linker from the group of benzene tricarboxylate (BTC), p-benzenedicarboxylate (p-BDC), m-benzoldicarboxylate (m-BDC), 1,4-dicarboxylate-2-bromobenzene (Br-BDC), Tetramethyl terephthalate (TMBDC), tetrafluoroterephthalate (TFBDC), Naphthalene-2,6-dicarboxylate (NDC), 2-diazobicyclo [2.2.2.] Octane (DABCO), biphenyl dicarboxylate (BPDC), triphenyldicarboxylate (TPDC), benzene-1,3,5-tribenzoate (BTB), 4,4'-bipyridine, Adamantane-1,3,5-tricarboxylate (ATC), trans-1,2-bis (4-pyridyl) ethylene (biphenyl), 2-amino-1,4-benzenedicarboxylate (ABDC), 2,3,5,6-tetramethyl-1,4-benzenedicarboxylate (TBDC), 2,5-dihydroxybenzoic acid (HDHBC), N-pyridylnicotinamide (PNA), pyrazine-2,3-dicarboxylate (PZDC), 1,12-dodecanedinitrile (DDN), 1,4-bis (4-pyridyl) benzene, 9,10-bis (4-pyridyl) anthracene, 4,4'-bis (4-pyridyl) biphenyl, Azodibenzoate (ADB), cis, cis-1,3,5-cyclohexanetricarboxylate (CTC), 2,5-dimethylpyrazine (DMPYZ), 2,4,6-tri (4-pyridyl) -1,3,5-triazine (TPT), Acetylenedicarboxylate (ADC), methanetetrabenzoate (MTB).
  4. Air dryer according to one of claims 1 to 3, characterized in that the MOFs from the group Cu 3 (BTC) 2 , [Zn 2 (1,4-BDC) 2 - (DABCO)], [Zn 2 (1,4-) BDC) (TMBDC) - (DABCO)], [Zn 2 (1,4-NDC) 2 (DABCO)], [Zn 2 (TFBDC) 2 - (DABCO)], [Zn 2 (TMBDC) 2 (BPY) ], Cu 3 (BTB) 3 , [Zn (BDC). (DMF) (H 2 O)], Zn (ABDC) (DMF). (C 6 H 5 Cl) 0.25 , Zn 2 (TBDC) 2 (H 2 O) 1.5 (DMF) 0.5 x (DMF) (H 2 O), Co 3 (BTC) 2 x 12H 2 O, Ni 3 (BTC) 2 x 12H 2 O, Zn 3 (BTC ) 2 · 12H 2 O, [Cu (DHBC) 2 (4,4'-BPY)] · H 2 O, [Co (NCS) 2 (3-PNA) 2 ] n , {[Ag (DDN) 2 ] · NO 3 } n , {[Zn 3 (OH) 2 (BPDC) 2 · DEF · 2H 2 O} n (DEF = N, N'-diethylformamide), [Cu (1,4-BDC) (4,4 '-BPY) 0.5 ] n , {[Zn 4 O (1,4-BDC) 3 ] • DMF • C 5 H 5 Cl} n , [Cu (1,4-BDC) (4,4'-) BPY) 0.5 ] n , {[Cu 2 (o-Br-1,4-BDC) 2 (H 2 O) 2 ] x 8 DMF x 2H 2 O} n , {[Cu 24 (1,3 BDC) 24 (DMF) 14 (H 2 O) 10 ] x 50H 2 O x 6DMF x 6EtOH} n , [{Cu (4,4'-BPY) 1.5 ] x NO 3 x 1.5H 2 O} n , {[Zn (1,4-BDC)]. DMF .H 2 O} n , {[Zn 3 (1,4-BDC) 3 ] .6MeOH} n , {[Zn 2 (1,3,5 -BTC) (NO 3 )] · 5EtOH · H 2 O) n , {[Zn (1,4-BDC) (H 2 O). DMF} n , Zn 2 (BTC) (NO 3 ) .H 2 O (C 2 H 5 OH) 5 , Zn 2 (crotonate) 4 (quinoline ) 2 , Zn 3 (crotonate) 6 (quinoline) 2 , Cd (ATC) x [Cd (H 2 O) 6 ] (H 2 O) 5 , Zn 2 (ATB) (H 2 O) x (H 2 O ) 3 (DMF) 3 , Ni 2 (ATC) (H 2 O) 4. (H 2 O) 4 , Zn 2 (ATC). (C 2 H 5 OH) 2 (H 2 O) 2 , Zn 2 ( MTB) (H 2 O) 2. (DMF) 6 (H 2 O) 5 , Zn 3 O (HBTB) 2 (H 2 O). (DMF) 0.5 (H 2 O) 3 , Zn 2 (BTC ) (NO 3 ) · (H 2 O) 0.5 (C 2 H 5 OH) and Zn 2 (BTC) (NO 3 ) · (H 2 O) 0.5 (C 2 H 5 OH) 0.5 (DMF) 2.5 can be selected.
  5. Air dryer according to one of claims 1 to 4, characterized in that the pore volumes of the MOFs at least 0.1 cm 3 / g.
  6. Air dryer according to one of claims 1 to 5, characterized in that the specific surface area of the MOFs is at least 50 m 2 / g.
  7. Air dryer according to one of claims 1 to 6, characterized that it can be regenerated with Duckluft.
  8. Air dryer according to one of claims 1 to 7, characterized that the drying material is largely resistant to abrasion.
  9. Air dryer according to one of claims 1 to 8, characterized that water adsorption and water desorption are essentially reversible is.
  10. Air dryer according to one of claims 1 to 9, characterized in that the drying material in the presence not clumped by water.
  11. Air dryer according to one of claims 1 to 10, characterized in that it is the MOFs as Ballast comprises.
  12. Air dryer according to one of claims 1 to 11, characterized in that the MOFs on a carrier material are fixed.
  13. Air dryer according to one of claims 1 to 12, characterized in that the water absorption capacity of MOFs is at least 20% by weight.
  14. Use of the air dryer according to one of claims 1 to 13 in air brake systems of vehicles.
DE200610031311 2006-07-06 2006-07-06 Air drier, useful in air brake system of vehicles, comprises a drying agent comprising a metal-organic framework, where the metal is a transition metal, which is linked with at least a bidentate linker Pending DE102006031311A1 (en)

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DE102008005218A1 (en) * 2007-11-04 2009-05-07 BLüCHER GMBH Sorption filter material and its use
WO2009092777A1 (en) * 2008-01-24 2009-07-30 Basf Se Porous metal-organic framework materials as drying agents
US8697191B2 (en) 2010-12-07 2014-04-15 Basf Se Process for coating a support surface with a porous metal-organic framework
CN103936796A (en) * 2014-03-21 2014-07-23 渤海大学 Cobalt complex based on flexible bipyridine bisamide ligand and benzenedicarboxylic acid, synthesis method and application thereof
EP3031512A1 (en) * 2014-12-11 2016-06-15 Vaillant GmbH Heat and moisture exchanger
CN106111080A (en) * 2016-06-30 2016-11-16 华南理工大学 Cu-BTC@ paper pulp composite material and forming production method thereof

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