Abstract: What is described is a slurry comprising (a) at least 10% by weight of at least one sheet silicate, based on the total weight of the slurry; (b) an aqueous suspension medium and (c) a dispersing aid selected from at least one polyethylene glycol having a mean molecular weight of less than 90 000 and/or at least one polyacrylic acid in free acid form. Also described is a process for producing the slurry and the preferred used thereof.

Abstract: The invention relates to the use of a composition comprising stevensite or at least one stevensite-containing component for adsorption of mycotoxins. The invention further relates to an animal feed formulation and to a process for animal feed treatment, in which this composition is used.

Abstract: A method for producing an adsorbing agent, an absorbing agent obtained by the method, and its use as bleaching earth, in particular for refining oils and fats, is described. In the method according to the invention, a raw clay with a specific surface area of more than 200 m2/g, an ion exchange capacity of more than 40 meq/100 g and a pore volume of more than 0.5 ml/g is used. At least 40% of the pore volume are provided by pores which have a pore diameter of at least 14 nm, and at most 25% of the pore volume are provided by pores which have a diameter of less than 7.5 nm. Surface activation with an acid gives an adsorbing agent which has a bleaching activity which partly exceeds that of high performance bleaching earths obtained by intensive dealuminization and washing with strong acid.

Abstract: The invention relates to a process for preparing a catalyst for the desulfurization of hydrocarbon streams, which comprises the steps: (a) preparation of an aqueous suspension comprising: a thermally decomposable copper source, a thermally decomposable molybdenum source, and a solid zinc source; (b) heating of the suspension to a temperature at which the thermally decomposable copper source and the thermally decomposable molybdenum source decompose so that a suspension of a precipitate comprising zinc compounds, copper compounds and molybdenum compounds is obtained; (c) cooling of the suspension obtained in step (b); (d) separation of the precipitate from the suspension; (e) drying of the precipitate. The invention further relates to a catalyst which can be obtained by the process of the invention and also to its use for the desulfurization of hydrocarbon streams.

Abstract: A swellable layer silicate is described based on smectite or sepiolite/palygorskite for use in media containing di- or polyvalent cations that reduce swellability, characterized by a swelling volume of about 5 to 50 mL, measured by addition of 2 g layer silicate (air-dried) to 100 mL water, and by a fineness of maximum 5 wt. % >40 ?m and maximum 20% >20 ?m, as dry sieve residue.

Abstract: The present invention relates to processes for improving or optimizing a catalyst for the preparation of phthalic anhydride by gas-phase oxidation of o-xylene and/or napthalene, which comprises the following steps: a) provision of a starting catalyst (C) comprising at least one first catalyst zone located towards the gas inlet and a second catalyst zone located closer to the gas outlet, with the catalyst zones preferably each having an active composition comprising TiO2; b) replacement of part of the first catalyst zone by an upstream zone of a catalyst having a higher activity than the first catalyst zone in order to provide an improved catalyst. Furthermore, an improved catalyst obtainable by this process is described.

Abstract: A charging device for a tube reactor has a plurality of metering chambers which can be filled with filling material, for example a catalytically coated carrier material. Each metering chamber is adjoined by a drop tube or some other filling device via which a tube of the filling device can be filled in each case. The metering chambers can each be filled via antechambers which are combined into one replaceable antechamber unit.

Abstract: The present invention relates to the use of a catalyst comprising at least one first catalyst zone located towards the gas inlet, a second catalyst zone located closer to the gas outlet and a third catalyst zone located even closer to or at the gas outlet for the preparation of phthalic anhydride by gas-phase oxidation of o-xylene and/or naphthalene, with the catalyst zones preferably each having an active composition comprising TiO2, characterized in that the catalyst activity of the first catalyst zone is higher than the catalyst activity of the second catalyst zone. Furthermore, a preferred process for the preparation of phthalic anhydride is described.

Abstract: The present invention relates to a catalyst combination for producing linear isotactic polymers containing an asymmetrical metal complex and also an activator.

Abstract: The present invention relates to a catalyst for preparing phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, comprising at least three catalyst zones which have different compositions and, from the gas inlet side toward the gas outlet side, are referred to as first, second and third catalyst zone, the catalyst zones having in each case an active composition comprising TiO2, and the active composition content decreasing from the first catalyst zone disposed toward the gas inlet side to the third catalyst zone disposed toward the gas outlet side, with the proviso that (a) the first catalyst zone has an active composition content between about 7 and 12% by weight, (b) the second catalyst zone has an active composition content in the range between 6 and 11% by weight, the active composition content of the second catalyst zone being less than or equal to the active composition content of the first catalyst zone, and (c) the third catalyst zone has an active composition content in the range b

Abstract: A description is given of water-soluble aminoplast ether copolymers of the following structural type: wherein Z is a glycoluril central unit, B is a radical of an essentially water-insoluble polymer and R1 is a radical of a hydrophilic organic compound. The ratio R1:B is selected within a range of about 1.5 to 4:1 and the overall mass of the water-soluble aminoplast ether copolymer is from about 2000 to 50 000 g/mol such that the copolymer is soluble in water and may be used as a dispersant for e.g. pigments in polar solvents, e.g. water.

Abstract: Disclosed is a mixed oxide catalyst, preferably for selective oxidation of CO in hydrogen rich gas mixtures, or in oxygen containing gas mixtures in the presence of water and carbon dioxide, comprising about 15 to 30 at.-% Cu, about 55 to 77 at.-% Mn and about 7.5 to 10 at.-% Ce.

Abstract: The present invention relates to a multilayer material comprising at least the following sequence of layers: a) a gas-barrier layer based on EVOH; b) an adhesion-promoter layer based at least one anhydride-modified polymer; c) an oxygen-absorber layer composed of at least one polymeric, non- particulate oxygen absorber, where the total thickness of the adhesion-promoter layer(s) is preferably at least approximately 10 ?m, and also to a process for their production, and to their use.

Abstract: A charging device for a tubular reactor has metering chambers which can be filled with filling material, such as, for example, catalytically coated carrier material, it being possible for a respective tube of the tubular reactor to be filled via a feed device which adjoins the metering chamber. The metering chamber has a sloping surface and an opposing surface for supporting the filling material, which run at an angle to one another.

Abstract: A process is described for producing synthetic zeolites useful as catalysts with a MFI structure, a Si/Al atomic ratio from about 8 to 45 to 1 and very small primary crystallites. A Si source, an Al source and an organic template are reacted with one another under hydrothermal conditions. The process is carried out in the presence of seed crystals with an average particle size from roughly 10 to 100 nm, preferably from 20 to 50 nm, prepared from an earlier batch of synthetic zeolites with a MFI structure, without separation from the mother liquor. The process further includes conversion by ion exchange of the zeolites into an H form. Moldings may also be produced by the addition of binders and optionally catalytically active base metal and/or precious metal components before or after the moldings are produced. The zeolites as claimed in the invention are characterized by the combination of the following features: (a) Si/Al atomic ratio 8 to 45:1 (b) Size of the primary crystallites roughly 0.01 to 0.

Abstract: A catalyst is described based on crystalline aluminosilicates of the pentasil type, characterized in that it is constructed from primary crystallites with an average diameter of at least 0.01 ?m and less than 0.1 ?m, that are combined to at least 20% to agglomerates of 5 to 500 ?m, in which the primary crystallites or agglomerates are bonded together by finely divided aluminum oxide, that its BET surface is 300 to 600 m2/g and its pore volume (determined according to mercury porosimetry) is 0.3 to 0.8 cm3/g, that it is present in H form and that the amount of finely divided aluminum oxide binder is 10 to 40 wt. %, referred to the total weight of the aluminosilicate, in which the finely divided aluminum oxide binder is used in the reaction charge as peptizable aluminum oxide hydrate, sodium aluminate being used as aluminum and alkali source, and primary synthesis of the crystalline aluminosilicate occurs without addition of acid.

Abstract: A method is described for the manufacture of hydrotalcites by using at least one compound of a bivalent metal (Component A) and at least one compound of a trivalent metal (Component B), wherein at least one of these components is not used in the form of a solution, characterized in that a) at least one of the Components A and/or B which is not used in the form of a solution, shortly before or during mixing of the components, and/or b) the mixture containing the Components A and B is subjected to intensive grinding until an average particle size (D50) in the range of approx. 0.1 to 5 ?m is obtained, and optionally, after aging treatment or hydrothermal treatment, the resulting hydrotalcite product is separated, dried, and optionally calcinated.

Abstract: A process for modification, in particular for surface modification of an organophilic clay material, encompassing the following steps: a) provision of a dry, pulverulent, organophilic clay material (component a); b) provision of at least one additive (component b) for modification of component a); c) intensive mixing of components a) and b) in a high-shear mixing assembly, where no water or solvent is added or used for addition of component b).

Abstract: The invention describes a process for producing a compound of the formula LiMPO4, in which M represents at least one metal from the first transition series, comprising the following steps: a) production of a precursor mixture, containing at least one Li+ source, at least one M2+ source and at least one PO43? source, in order to form a precipitate and thereby to produce a precursor suspension; b) dispersing or milling treatment of the precursor mixture and/or the precursor suspension until the D90 value of the particles in the precursor suspension is less than 50 ?m; and c) the obtaining of LiMPO4 from the precursor suspension obtained in accordance with b), preferably by reaction under hydrothermal conditions. The material obtainable by this process has particularly advantageous particle size distributions and electrochemical properties when used in electrodes.

Abstract: A catalyst is described for hydrogenation of unsaturated hydrocarbons, containing catalytically active amounts of Pd and optionally Ag in a support. The catalyst is characterized by the fact that the support represents a shaped body with a trilobal cross section, the lobes being provided with continuous openings. The catalysts can be produced according to a method, in which the support is impregnated with a solution of salts of Pd and optionally Ag. These salts are reduced by means of a reducing agent, whereupon the support so impregnated is washed, dried and calcined and, if reduction is not complete, the still present oxides of Pd and Ag are reduced to the corresponding metals in a hydrogen-containing atmosphere.