Adsorptive molded parts and the use thereof
OwnerHasso von Blücher, Bertram Böhringer +2inventors
InventorsHasso von Blücher, Bertram Böhringer, Sven Fichtner, Jann-Michael Giebelhausen
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Abstract
The invention relates to an adsorptive molded part preferably formed as a monolithic or single-piece part, wherein the molded part is constructed of a plurality of adsorptive structures based on agglomerates of adsorber particles, and to a method for producing said molded part and to the use thereof.
Claims51
An adsorptive molded part,
- characterized in that
- the molded part is constructed from a multiplicity of adsorptive structures based on agglomerates of adsorbent particles.
The adsorptive molded part according to any preceding claim, characterized in that the molded part is in one-piece and/or monolithic form.
The adsorptive molded part according to any preceding claim, characterized in that the molded part is in cylindrical, rod-shaped, plate-shaped, cube-shaped, polyhedral or the like form.
The adsorptive molded part according to any preceding claim, characterized in that the molded part has a length-based pressure drop at a flow rate of 0.2 m/s of at most 200 Pa/cm, more particularly at most 150 Pa/cm, preferably at most 100 Pa/cm, more preferably at most 90 Pa/cm, even more preferably at most 70 Pa/cm and yet even more preferably at most 50 Pa/cm.
The adsorptive molded part according to any preceding claim, characterized in that the molded part has a length-based pressure drop at a flow rate of 0.2 m/s in the range from 5 to 200 Pa/cm, more particularly in the range from 5 to 150 Pa/cm, preferably in the range from 5 to 100 Pa/cm, more preferably in the range from 7.5 to 90 Pa/cm and even more preferably in the range from 10 to 80 Pa/cm.
The adsorptive molded, part according to any preceding claim, characterized in that the molded part is obtainable by compression molding the adsorptive structures based on agglomerates of adsorbent particles.
The adsorptive molded part according to any preceding claim, characterized in that the individual agglomerates of adsorbent particles of the adsorptive structures each comprise a multiplicity of granular, ar preferably spherical adsorbent particles.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles of an individual agglomerate are bound together via a preferably thermoplastic organic polymer, more particularly binder, and/or in that the adsorbent particles of an individual agglomerate are bound and/or adhered to a preferably thermoplastic organic polymer, more particularly binder.
The adsorptive molded part according to any preceding claim, characterized in that the organic polymer forms at least one core of the particular agglomerate and/or in that the adsorbent particles of an individual agglomerate are each disposed and/or lodged at one or more core of organic polymer, more particularly binder, more particularly wherein the individual agglomerates may each comprise one or more cores of organic polymer, more particularly binder.
The adsorptive molded part according to any preceding claim, characterized in that the individual agglomerates each comprise at least 5 adsorbent particles, more particularly at least 10 adsorbent particles, preferably at least 15 adsorbent particles and more preferably at least 20 adsorbent particles, and/or in that the individual agglomerates each comprise up to 50 adsorbent particles, more particularly up to 75 adsorbent particles and preferably up to 100 adsorbent particles or more.
The adsorptive molded part according to any preceding claim, characterized in that the individual agglomerates each have a weight ratio of adsorbent particles to organic polymer per agglomerate of at least 2:1, more particularly at least 3:1, preferably at least 5:1, more preferably at least 7:1 and even more preferably at least 8:1, and/or in that the individual agglomerates each have a weight ratio of adsorbent particles to organic polymer per agglomerate in the range from 2:1 to 30:1, more particularly in the range from 3:1 to 20:1, preferably in the range from 4:1 to 15:1 and more preferably in the range from 5:1 to 10:1.
The adsorptive molded part according to any preceding claim, characterized in that the individual agglomerates are in self-supporting form.
The adsorptive molded part according to any preceding claim, characterized in that the individual agglomerates are in particle form, more particularly wherein the agglomerates have particle sizes, particularly particle diameters, in the range from 0.01 to 20 mm, more particularly in the range from 0.05 to 15 mm, preferably in the range from 0.1 to 10 mm, more preferably in the range from 0.2 to 7.5 mm and even more preferably in the range from 0.5 to 5 mm.
The adsorptive molded part according to any preceding claim, characterized in that the individual agglomerates each have a raspberry- or blackberrylike structure.
The adsorptive molded part according to any preceding claim, characterized in that the organic polymer is in thermoplastic form, and/or in that the organic polymer is in heat-tacky form, and/or in that the organic polymer is selected from polymers from the group of polyesters, polyamides, polyethers, polyetheresters and/or polyurethanes and also their mixtures and copolymers.
The adsorptive molded part according to any preceding claim, characterized in that the organic polymer is a preferably thermoplastic binder, more particularly a preferably thermoplastic hot-melt adhesive, preferably based on polymers from the group of polyesters, polyamides, polyethers, polyetheresters and/or polyurethanes and also their mixtures and copolymers.
The adsorptive molded part according to any preceding claim, characterized in that the organic polymer, more particularly the binder, preferably the hot-melt adhesive, is solid at 25° C. and atmospheric pressure, and/or in that the organic polymer, more particularly the binder, preferably the hot-melt adhesive, has a melting or softening range above 100° C., preferably above 110° C. and more particularly above 120° C., and/or in that the organic polymer, more particularly the binder, preferably the hot-melt adhesive, has a thermal stability temperature of at least 100° C., preferably at least 125° C. and more particularly at least 150° C.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles of the individual agglomerates are covered and/or coated with organic polymer to at most 50%, more particularly to at most 40%, preferably to at most 30% and more preferably to at most 20% of their surface.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles have a porous structure, and/or in that the adsorbent particles are in granular, more particularly spherical, form.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles have particle sizes, more particularly particle diameters, in The range from 0.001 to 3 mm, more particularly in the range from 0.005 to 2.5 mm, preferably in the range from 0.01 to 2 mm, more preferably in the range from 0.02 to 1.5 mm and even more preferably in the range from 0.05 to 1 mm.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles have median particle sizes, more particularly median particle diameters (D50), in the range from 0.01 to 2 mm, more particularly in the range from 0.05 to 1.5 mm and preferably in the range from 0.1 to 1 mm.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles consist of a material selected from the group of activated carbon;
- zeolites;
- inorganic oxides, more particularly silicon dioxides, silica gels and aluminum oxides;
- molecular sieves;
- mineral granulates;
- klathrates;
- metal-organic framework materials (MOFs) and also their mixtures, more preferably activated carbon, and/or in that the adsorbent particles are formed from granular, more particularly spherical, activated carbon.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles have a specific surface area (BET surface area) of at least 500 m2/g, more particularly at least 750 m2/g, preferably at least 1000 m2/g and more preferably at least 1200 m2/g, and/or in that the adsorbent particles have a specific surface area (BET surface area) in the range from 500 to 4000 m2/g, more particularly in the range from 750 to 3000 m2/g, preferably in the range from 900 to 2500 m2/g and more preferably in the range from 950 to 2000 m2/g.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles, more particularly the activated carbon particles, preferably the activated carbon granules or activated carbon spherules, have a bursting pressure of at least 5 newtons, more particularly a bursting pressure in the range from 5 newtons to 50 newtons, per particle.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles have an adsorption volume Vads of at least 250 cm3/g, more particularly at least 300 cm3/g, preferably at least 350 cm3/g and more preferably at least 400 cm3/g, and/or in that the adsorbent particles have an adsorption volume Vads in the range from 250 to 3000 cm3/g, more particularly in the range from 300 to 2000 cm3/g and preferably in the range from 350 to 2500 cm/g.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles have a Gurvich total pore volume of at least 0.50 cm3/g, more particularly at least 0.55 cm3/g, preferably at least 0.60 cm3/g, more preferably at least 0.65 cm3/g and even more preferably at least 0.70 cm3/g, and/or in that the adsorbent particles have a Gurvich total pore volume in the range from 0.50 to 2.0 cm3/g, more particularly in the range from 0.55 to 1.5 cm3/g, preferably in the range from 0.60 to 1.2 cm3/g and more preferably in the range from 0.65 to 1.0 cm3/g.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles have a total porosity in the range from 10% to 80%, more particularly in the range from 20% to 75% and preferably in the range from 25% to 70%.
The adsorptive molded part according to any preceding claim, characterized in that the adsorbent particles have a specific total pore volume in the range from 0.01 to 4.0 cm3/g, more particularly in the range from 0.1 to 3.0 cm3/g, and preferably in the range from 0.2 to 2.0 cm3/g, more particularly wherein the proportion of pores having pore diameters ≦75 Å is at least 65%, more particularly at least 70% and preferably at least 75%.
A process for producing an adsorptive molded, part according to the preceding claims,
- characterized in that
- adsorptive structures based on agglomerates of adsorbent particles, more particularly as defined in the preceding claims, are compression molded.
The use of an adsorptive molded part according to the preceding claims for the adsorption of toxics, noxiants and odors, more particularly from gas or air streams or alternatively from liquids, more particularly water.
The use of an adsorptive molded part according to the preceding claims for cleaning or purifying gases, gas streams or gas mixtures, more particularly air, or liquids, more particularly water.
The use of an adsorptive molded part according to the preceding claims for use in adsorption filters.
The use of an adsorptive molded part according to the preceding claims in the manufacture of filters, more particularly adsorption filters.
The use of an adsorptive molded part according to the preceding claims as a sorption store for gases, more particularly hydrogen.
A filter comprising an adsorptive molded part according to the preceding claims.
Dependencies are inferred from the claim text.