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: A pigment of empirical composition (TiO2)a(ZnO)b(SnO)c(SnO2)d(RExOy)e(AEO)f(MuOv)g wherein RE is a metal from transition group 3 or a rare earth metal, AE is an alkaline earth metal, and M is any other metal, where a=0.8-3; b=0.5-1.3; c=0.5-1.3; d=0-0.5; e=0-0.3; f=0-0.3; and g=0-0.1, and e+f?0.01. Preferably RE is selected from the elements Y, La, Ce, and Pr. The pigments are used as colorants for coloring paints, inks, plastics, and rubber.

Abstract: A pigment of empirical composition (TiO2)a(ZnO)b(SnO)c(SnO2)d(RExOy)e(AEO)f(MuOv)g wherein RE is a metal from transition group 3 or a rare earth metal, AE is an alkaline earth metal, and M is any other metal, where a=0.8-3; b=0.5-1.3; c=0.5-1.3; d=0-0.5; e=0-0.3; f=0-0.3; and g=0-0.1, and e+f?0.01. Preferably RE is selected from the elements Y, La, Ce, and Pr. The pigments are used as colorants for coloring paints, inks, plastics, and rubber.

Abstract: Use of luster pigments based on a platelet-shaped metallic substrate coated with a low refractive dielectric layer which does not absorb visible light, for pigmenting macromolecular materials.

Abstract: Use of luster pigments based on a platelet-shaped metallic substrate coated with a low refractive dielectric layer which does not absorb visible light, for pigmenting macromolecular materials.

Abstract: Luster pigments having pronounced sparkle which are based on aluminum platelets which have been coated with iron oxide and have in the precoated state an average platelet size from 8 to 30 ?m, an average platelet thickness from 300 to 600 nm and an aspect ratio from 15 to 70.

Abstract: The use of bismuth vanadate pigments containing ?1.4% by weight of aluminum for coloring powder coating materials.

Abstract: Goniochromatic luster pigments comprising at least one dielectric low-refractive interference-colored layer which includes a polar organic solvent which can interact with the layer material via functional groups.

Abstract: Luster pigments having pronounced sparkle which are based on aluminum platelets which have been coated with iron oxide and have in the precoated state an average platelet size from 8 to 30 ?m, an average platelet thickness from 300 to 600 nm and an aspect ratio from 15 to 70.

Abstract: Use of luster pigments based on a platelet-shaped metallic substrate coated with a low refractive dielectric layer which does not absorb visible light, for pigmenting macromolecular materials.

Abstract: Goniochromatic luster pigments comprising at least one dielectric low-refractive interference-colored layer which includes a polar organic solvent which can interact with the layer material via functional groups.

Abstract: Goniochromatic luster pigments are based on titanium dioxide-coated silicatic platelets which have been heated in a reducing atmosphere and which comprise at least one layer packet comprising A) a colorless coating having a refractive index n≦1.8 and B) a coating which has a refractive index n≧2.0, which includes iron(III) oxide and which selectively absorbs visible light.

Abstract: Luster pigments based on multiply coated reflecting platelet-shaped substrates and comprising at least one layer packet comprising A) a low refractive coating which selectively absorbs visible light and B) a reflective coating which is at least partially transparent to visible light and also, if desired, C) an outer protective layer.

Abstract: Bismuth vanadate pigments comprising at least one coating containing calcium fluoride, bismuth oxyfluoride or a lanthanide fluoride or oxyfluoride or a mixture thereof are useful for coloring paints, printing inks and plastics.

Abstract: Bismuth vanadate pigments comprising at least one coating containing calcium fluoride, bismuth oxyfluoride or a lanthanide fluoride or oxyfluoride or a mixture thereof are useful for coloring paints, printing inks and plastics.

Abstract: Aqueous coating compositions comprise a water-soluble or water-dispersible film-forming polymer, a metallic pigment based on coated metal flakes, an organic nitro compound which is further carboxyl-, carbonyl- and/or hydroxyl-functionalized, and an organic solvent in which the nitro compound is soluble, along with further components customary for aqueous coating compositions.

Abstract: The iron oxide platelets comprise at least one layer packet comprising A) a colorless coating having a refractive index n≦1.8, and B) a colorless coating having a refractive index n≧2.0.

Abstract: Goniochromatic luster pigments are based on titanium dioxide-coated silicatic platelets which have been heated in a reducing atmosphere and which comprise at least one layer packet comprisingA) a colorless coating having a refractive index n.ltoreq.1.8 andB) a colorless coating having a refractive index n.gtoreq.2.0.