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: 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.

Abstract: A disk-shaped wafer is described which is based on an inorganic sorbent and a binder, with a thickness of less than 700 microns, which can be obtained by pressing a mixture of the inorganic sorbent, about 20 to 60% by weight of the binder and about 10 to 15% by weight water at a pressure of at least 70 MPa; and calcining the resulting green wafer at temperatures of at least about 500° C. until the water content is substantially removed.

Abstract: The invention relates to a process of processing an acid suspension containing at least one solid, wherein (a) the suspension containing at least one solid is mixed with an alkali metal silicate solution, the pH of the mixture being adjusted to a pH of more than 4, and (b) the resulting precipitate which contains the alkali metal silicate and the at least one solid is separated and optionally washed, dried and ground. The mixture according to (a) after aging may be acidified further by the addition of an acid. Furthermore, there are disclosed an adsorbent obtainable according to the preceding process, and the use thereof.

Abstract: The invention is directed to a method for producing adsorption agent granules on the basis of acid-activated layer silicates, wherein by the acid activation at least 10% of the aluminium oxide present in the starting material is removed, and wherein the filtered material obtained after acid activation is formed by high compacting forming steps, and an increase in bulk density of at least 10% is achieved.

Abstract: A process for producing catalysts by acid activation of phyllosilicates and coating with catalytically active metal ions wherein the acid activation is carried out in the presence of catalytically active metal ions. The solution which forms during acid activation together with the remaining solution which contains the excess, catalytically active cations are separated. The catalysts can be used for proton-catalyzed and Lewis acid-catalyzed reactions, especially for conversion of higher olefins with aromatic hydroxy compounds and amines, for esterification and dehydration reactions and for purification of aromatics.

Abstract: A process is described for producing synthetic zeolites with a MFI structure, a Si/Al atomic ratio from roughly 8 to 45 and very small primary crystallites, a Si source, an Al source and an organic template being reacted with one another under hydrothermal conditions, the Si/Al atomic ratio being roughly 9 to 50 and the ratio between the longest and shortest axis of the primary crystallites being roughly 1.0 to 1.5:1; the process is characterized in that the reaction 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 from an earlier batch without separation from the mother liquor. The zeolites as claimed in the invention which 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 0.05 microns; (c) Ratio between longest and shortest axis of the primary crystallites: roughly 1.0 to 1.

Abstract: A process for the microbial activation of layer silicates.

Abstract: Surface-modified fillers are described characterized by the fact that the fillers represent reactive inorganic fillers and the modifying agent represents an amphiphilic aminoplastic-ether polymer or copolymer of the structural type in which: Z denotes the same or different aminoplastic central units based on melamine-formaldehyde or urea-formaldehyde derivatives; n=10 to 500; R denotes the group —[O—CH2—CH2]mO—S in which m=5 to 500 and S represents a substituted or unsubstituted alkyl, aryl, alkaryl or aralkyl group.

Abstract: Porous material (1) for catalytic conversion of exhaust gases including a carrier with a first porous structure (2, 2?), and an oxidation catalyst (OX) which in the presence of oxygen (O2), according to a first reaction (3), has the ability to catalyze oxidation of nitrogen monoxide (NO) into nitrogen dioxide (NO2) and, according to a second reaction (4, 4?), to catalyze oxidation of a reducing agent (HC), which oxidation catalyst (OX) is enclosed inside the first porous structure (2, 2?). The invention is characterized in that the oxidation catalyst (OX) includes iron (Fe) and silver (Ag) loaded on a zeolite. The invention also relates to a method and an arrangement and a catalytic conversion device that utilizes the porous material, and indicates an advantageous use of the porous material.

Abstract: There is a disclosed or process for treating industrial waste water highly loaded with ammonium, by treating the waste water with nitrifying microogransims (nitric bacteria) in the presence of a suspended carrier substance with a specific surface area of >20 m2/g and optionally a denitrification with denitrifying microorganisms (denitrifying bacteria). According to a modification of the process, a finely-divided carbon-containing material with a surface-pH value of around 6 to 9 is used instead of the silicate carrier substance.

Abstract: A rubber compound is described containing as a reinforcing filler a layered silicate which is obtained by excessive leaching of a smectitic layered silicate with mineral acids. The rubber compound further contains at least one diene polymer or copolymer and a coupler containing groups reactive with the filler. There is also described a method for production of the rubber compound and molded articles produced from the rubber compound.

Abstract: Mycotoxin adsorbents are produced containing an organically modified (organophilic) layered silicate, in which quaternary onium compounds contain at least one C10 to C22 alkyl group and at least one aromatic substituent, or containing a mixture of not organically modified silicate and a layered silicate organically modified at least to 75%, referring to the total cation exchange capacity (CEC) of the layered silicate.

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: A catalyst is described based on crystalline aluminosilicates of the pentasil type, characterized by the fact that it is constructed from primary crystallizes with an average diameter of at least 0.01 &mgr;m and less than 0.1 &mgr;m, that are combined to at least 20% to agglomerates of 5 to 500 &mgr;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 present 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: The invention relates to a flameproof, essentially halogen-free polymer composition, containing the following: a) 100 parts by weight of a thermoplastic, cross-linkable or cross-linked, elastomeric and/or duroplastic polymer; b) 10 to 200 parts by weight of magnesium, calcium, zink and/or aluminiumhydroxide and/or their double hydroxides; c) 1 to 50 parts by weight of an organic intercalated sheet silicate.

Abstract: A process for the production of zeolites with a high Si/Al atomic ratio formed by the conversion of amorphous polysilicas (polysilacic acid) with a source of aluminum ions and optionally a template wherein the conversion occurs at a temperature of less than about 100° C., wherein ammonium hydroxide and/or an alkali metal silicate is added to the conversion solution.