Abstract: A process for separating at least one hydrophobic material from a mixture comprising this at least one hydrophobic material and at least one hydrophilic material, which comprises the steps: (A) preparation of a slurry or dispersion of the mixture to be treated in at least one suitable dispersion medium, (B) contacting of the slurry or dispersion from step (A) with at least one solid, hydrophobic surface to bind the at least one hydrophobic material to be separated off to this, (C) removal of the at least one solid, hydrophobic surface to which the at least one hydrophobic material is bound from step (B) from the slurry or dispersion in which the at least one hydrophilic material is comprised and (D) separation of the at least one hydrophobic material from the solid, hydrophobic surface.

Abstract: The present invention relates to a process for separating at least one first material from a mixture comprising this at least one first material in an amount of from 0.001 to 1.

Abstract: The present invention relates to an agglomerate of at least one particle P which is hydrophobicized on the surface with at least one first surface-active substance and at least one magnetic particle MP which is hydrophobicized on the surface with at least one second surface-active substance, a process for producing it and also the use of these agglomerates.

Abstract: The present invention relates to a process of the invention for separating at least one first material from a mixture comprising this at least one first material and at least one second material, which comprises the steps: (A) Contacting of at least one magnetic particle and at least one bifunctional molecule or an adduct of the two with the mixture comprising the at least one first material and at least one second material so that an adduct is formed from the at least one magnetic particle, the bifunctional compound of the general formula (I) and the at least one first material, (B) suspension of the adduct obtained in step (A) in a suitable suspension medium, (C) separation of the adduct present in the suspension from step (B) from the suspension by application of a magnetic field, (D) if appropriate, dissociation of the adduct separated off in step (C) in order to obtain the at least one first material. a corresponding adduct and the use of such an adduct for the separation of mixtures of materials.

Abstract: The present invention relates to a process for separating at least one first material from a mixture comprising this at least one first material and at least one second material, which comprises at least the following steps: (A) contacting of the mixture comprising at least one first material and at least one second material with at least one surface-active substance, if appropriate in the presence of at least one dispersion medium, with the surface-active substance binding to the at least one first material, (B) if appropriate, addition of at least one dispersion medium to the mixture obtained in step (A) in order to obtain a dispersion, (C) treatment of the dispersion from step (A) or (B) with at least one hydrophobic magnetic particle so that the at least one first material to which the at least one surface-active substance is bound and the at least one magnetic particle agglomerate, (D) separation of the agglomerate from step (C) from the mixture by application of a magnetic field in order to obtain th

Abstract: In a device and a method for extracting non-magnetic ores from a pulp comprising non-magnetic ore particles and having a solid fraction of at least 30 mass percent, the pulp flows continuously through a reactor in the direction of flow and magnetic or magnetizable magnet particles that form ore magnetic particle agglomerations with the non-magnetic ore particles are added to said pulp. The ore magnetic particle agglomerations are moved by a magnetic field into an accumulation range of the reactor, and are then discharged out of reactor range and separated into ore and magnetic particles. In a device and a method, the separated magnetic particles are treated, in particular hydrophobized, such that during a new interaction with non-magnetic ore particles, new ore magnetic particle agglomerations are formed. Accordingly, a high yield of ores can be obtained and the mine can be operated in an economical and environmentally friendly manner.

Abstract: The present invention relates to a process for separating at least one first material from a mixture comprising this at least one first material and at least one second material, which comprises the steps: (A) production of a suspension of the mixture comprising at least one first material and at least one second material and at least one magnetic particle in a suitable suspension medium, (B) setting of the pH of the suspension obtained in step (A) to a value at which the at least one first material and the at least one magnetic particle bear opposite surface charges so that these agglomerate, (C) separation of the agglomerate obtained in step (B) from the suspension by application of a magnetic field and (D) dissociation of the agglomerate separated off in step (C) by setting of the pH to a value at which the at least one first material and the at least one magnetic particle bear the same surface charges in order to obtain the at least one first material.

Abstract: The present invention relates to a process for separating at least one first material from a mixture comprising this at least one first material and at least one second material, which comprises the following steps: (A) contacting of the mixture comprising at least one first material and at least one second material with at least one surface-active substance, if appropriate in the presence of at least one dispersant, resulting in the surface-active substance becoming attached to the at least one first material, (B) if appropriate, addition of at least one dispersant to the mixture obtained in step (A) to give a dispersion having a suitable concentration, (C) treatment of the dispersion from step (A) or (B) with at least one hydrophobic magnetic particle so that the at least one first material to which the at least one surface-active substance is bound and the at least one magnetic particle become attached to one another, (D) separation of the addition product from step (C) from the mixture by application of

Abstract: Described is a metal oxide support material nanoscaled iron-platinum group metal particles having a particle size in the range of 0.5 to 10 nm, wherein at least 70% of all nanoscaled iron-platinum group metal particles are located on an outside surface layer of the metal oxide support material, and wherein the outside surface layer has an average volume of less than 50% based on the total volume of the metal oxide support material. Additionally, described is a process for the preparation of such metal oxide support material comprising nanoscaled iron-platinum group metal particles. Furthermore, described is the use of metal oxides containing nanoscaled iron-platinum group metal particles as catalysts, for example as a diesel oxidation catalyst for the treatment of exhaust gas emissions from a diesel engine.

Abstract: The present invention relates to a stable mixture comprising surface-modified particles which are obtained by reacting metal oxide or semimetal oxide particles with at least one compound selected from among silicon-comprising compounds bearing at least one metaloxy radical and optionally further alkoxy and/or hydroxy radical(s) and at least one solvent, at least one surface-active substance or a mixture thereof, a process for producing the mixture, the use of these particles in systems in which they are brought into contact with at least one solvent, where the mass ratio of solvent to modified particle is greater than 500, and also the use of these particles in agglomeration-deagglomeration cycles.

Abstract: The present invention relates to a process for separating at least one first material from a mixture comprising this at least one first material and at least one second material, which comprises the following steps (A) contacting of the mixture comprising at least one first material and at least one second material with at least one magnetic particle in the presence of at least one dispersion medium so that the at least one first material and the at least one magnetic particle agglomerate, (B) if appropriate, addition of further dispersion medium to the dispersion obtained in step (A), (C) separation of the agglomerate from step (A) or (B) from the mixture by application of a magnetic field, (D) and dissociation of the agglomerate separated off in step (C) in order to obtain the at least one first material and the at least one magnetic particle separately, with an energy input of at least 10 kW/m3 being introduced into the dispersion in step (A).

Abstract: A method for magnetic ore separation and/or dressing is provided, in which metalliferous recoverable materials are separated from conveyed metalliferous ore rock.

Abstract: The present invention relates to a process for the separation of at least one metal from a slag, comprising that at least one metal and further components, comprising at least step (A) grinding the slag, (B) if appropriate, contacting the ground slag of step (A) with at least one surface-active substance and/or at least one magnetic particle, if appropriate in the presence of at least one dispersant, resulting in formation of agglomerates of the at least one metal and the at least one magnetic particle, (C) if appropriate, addition of at least one dispersant to the mixture obtained in step (B) to give a dispersion having a suitable concentration, and (D) separation of the agglomerates from the mixture of step (B) or (C) by application of a magnetic field, and to the use of at least one magnetic particle for the separation of slag.

Abstract: Provided is a method of assaying noble metals in a mineral and/or ceramic matrix in the content range from 0.03 to 500 mg/kg. The method comprises dry thermal treatment of a homogenized sample in a reducing atmosphere, extraction in an oxidizing medium, and atomic spectrometric quantification of the noble metals by means of ICP-QMS.

Abstract: The present invention relates to a process for producing a layer comprising at least one semiconductive metal oxide on a substrate, comprising at least the steps of: (A) applying a porous layer of at least one semiconductive metal oxide to a substrate, (B) treating the porous layer from step (A) with a solution comprising at least one precursor compound of the semiconductive metal oxide, such that the pores of the porous layer are at least partly filled with this solution and (C) thermally treating the layer obtained in step (B) in order to convert the at least one precursor compound of the semiconductive metal oxide to the semiconductive metal oxide, wherein the at least one precursor compound of the at least one semiconductive metal oxide in step (B) is selected from the group consisting of carboxylates of mono-, di- or polycarboxylic acids having at least three carbon atoms or derivatives of mono-, di- or polycarboxylic acids, alkoxides, hydroxides, semicarbazides, carbamates, hydroxamates, isocyanates, am

Abstract: The present invention relates to a stable mixture comprising surface-modified particles which are obtained by reacting metal oxide or semimetal oxide particles with at least one compound selected from among silicon-comprising compounds bearing one, two or three alkoxy radicals and at least one solvent, at least one surface-active substance or a mixture thereof, the use of these particles in systems in which they are brought into contact with at least one solvent, where the mass ratio of solvent to modified particle is greater than 500, and also the use of these particles in agglomeration-deagglomeration cycles.

Abstract: The present invention relates to a process for producing a layer comprising at least one semiconductive metal oxide on a substrate, comprising at least the steps of: (A) preparing a solution comprising at least one precursor compound of the at least one metal oxide selected from the group consisting of carboxylates of mono-, di- or polycarboxylic acids having at least three carbon atoms, or derivatives of mono-, di- or polycarboxylic acids, alkoxides, hydroxides, semicarbazides, carbamates, hydroxamates, isocyanates, amidines, amidrazones, urea derivatives, hydroxylamines, oximes, urethanes, ammonia, amines, phosphines, ammonium compounds, azides of the corresponding metal and mixtures thereof, in at least one solvent, (B) applying the solution from step (A) to the substrate and (C) thermally treating the substrate from step (B) at a temperature of 20 to 200° C.

Abstract: The present invention relates to a process for separating at least one first material from a mixture comprising this at least one first material, at least one second material and at least one third material, which comprises at least the following steps: (A) contacting of the mixture comprising at least one first material, at least one second material and at least one third material with at least one hydrocarbon in an amount of from 0.01 to 0.

Abstract: The present invention relates to an agglomerate of at least one particle P which is hydrophobicized on the surface with at least one first surface-active substance and at least one magnetic particle MP which is hydrophobicized on the surface with at least one second surface-active substance, a process for producing it and also the use of these agglomerates.

Abstract: The present invention relates to a process for separating at least one first material from a mixture comprising this at least one first material, at least one second material and magnetic particles, which comprises the following steps (A) at least partial removal of the magnetic particles by application of a magnetic field gradient, optionally in the presence of at least one dispersing medium, to give a mixture comprising at least one first material and at least one second material and a reduced amount of magnetic particles, (B) contacting of the mixture comprising at least one first material and at least one second material from step (A) with magnetic particles so that the at least one first material and the magnetic particles agglomerate, (C) separation of the agglomeration product from the mixture from step (B) by application of a magnetic field gradient and (D) dissociation of the agglomeration product separated off in step (C) in order to obtain the at least one first material and the magnetic particles