Abstract: The invention relates to a method for carrying out CC-coupling reactions, in particular a Heck and Suzuki reaction, in the presence of supported palladium as the catalyst and a base in a monophase or multiphase solvent mixture. According to said method, palladium detaches itself from the support in a characteristic manner, is redeposited after the reaction and the quantity of palladium not deposited after the reaction is significantly lower than 5000 ppm, in relation to the palladium used.

Abstract: Metal catalysts comprising hollow forms or spheres are made of metal alloy and optionally activated. The metal catalysts can be used for the hydrogenation, dehydrogenation, isomerization reductive alkylation, reductive amination, and/or hydration reaction of organic compounds.

Abstract: The invention relates to a high performance catalyst containing a layer on an inert carrier body comprising noble metals from the platinum group deposited on support materials. The catalyst is characterised in that, the layer comprises platinum deposited in a washcoat consisting of Al2O3 which is stabilized with lanthana (La2O3), ceria (CeO2), which is stabilized with zirconia (ZrO2) and praseodymium (Pr6O11). The supprot is promoted by sulfur-containing compounds which come from at least one of following compounds: platinum sulfite (PtSO3), sulfuric acid (H2SO4), ammonium sulfate ((NH4)2SO4), titanium oxysulfate (TiOSO4), titanium sulfate (Ti2(SO4)3), and zirconium sulfate (Zr(SO4)2).

Abstract: Metal catalysts comprising hollow forms or spheres are made of metal alloy and optionally activated. The metal catalysts can be used for the hydrogenation, dehydrogenation, isomerization reductive alkylation, reductive amination, and/or hydration reaction of organic compounds.

Abstract: The invention relates to a method for carrying out CC-coupling reactions, in particular a Heck and Suzuki reaction, in the presence of supported palladium as the catalyst and a base in a monophase or multiphase solvent mixture. According to said method, palladium detaches itself from the support in a characteristic manner, is redeposited after the reaction and the quantity of palladium not deposited after the reaction is significantly lower than 5000 ppm, in relation to the palladium used.

Abstract: Moldings based on pyrogenic silicon dioxide with a pore volume of 0.5 to 1.8 ml/g are prepared by homogenizing pyrogenic silicon dioxide with methylhydroxyethyl cellulose, wax and polyethylene glycol with the addition of water, subjecting this mixture to a compounding and shaping process, extruding, optionally cutting the extrudate to the desired length using a cutting device, drying at a temperature of 70° to 150° C. and conditioning for a period of 30 minutes to 10 hours at a temperature of 400° to 1200° C. The moldings may be used as catalysts or catalyst supports for the preparation of vinyl acetate monomer, the hydration of ethylene and the hydration of propylene.

Abstract: Metal catalysts comprising hollow forms or spheres are made of metal alloy and optionally activated. The metal catalysts can be used for the hydrogenation, dehydrogenation, isomerization reductive alkylation, reductive amination, and/or hydration reaction of organic compounds.

Abstract: Propyl silanes functionalized in 3-position are produced by catalytically reacting allyl compounds of the formula H2C═CH—CH2X with silanes of the formula R2R3R4SiH and using a 3- to 100-fold excess of silane.

Abstract: A process for the continuous catalytic conversion of organic compounds, that, together with unwanted attendant materials, form a starting substance: first the organic compounds of the starting material are purposely extracted by means of condensed fluids. Then the extract, containing the condensed fluids and organic compounds as the reaction mixture is contacted with a catalyst for the catalytic conversion of the organic compounds to form a product mixture, which contains the individual products of the catalytic conversion. The product mixture is separated from the reaction mixture and the fluids employed are, optionally, conducted back for extraction.

Abstract: Compacts based on pyrogenically produced silicon dioxide and having the following physical and chemical characteristics: Outer diameter 0.8-20 mm BET surface area 30-400 m2/g Pore volume 0.5-1.3 ml/g Breaking strength 10-250N Composition >99.8 wt. % SiO2 Other constituents <0.2 wt. % Abrasion <5 wt. % Apparent weight 350-750 g/l are produced in that pyrogenically produced silicon dioxide is homogenized with methyl cellulose, microwax and polyethylene glycol with addition of water, dried at a temperature of 80-150° C. and comminuted to a powder, optionally the powder is compressed into compacts, and heat-treated at a temperature of 400 to 1200° C. for a time of 0.5 to 8 hours. These compacts can be used as catalysts or catalyst carriers in vinyl acetate monomer production and ethylene hydration.

Abstract: The use of modified silicon dioxide as a catalyst support in catalytic reactions under hydrothermal conditions is described. The pore structure of the supports may be stabilized against hydrothermal reaction conditions by impregnating the catalyst supports with elements of Group IVB of the Periodic Tube of Elements.

Abstract: A process for producing carboxylic acid esters by the following steps:a) preparation of a reaction mixture containing an alcohol and a carboxylic acid and/or a carboxylic anhydride and/or a carboxylic acid ester and or a partially esterified carboxylic acid,b) heating of this mixture to the suitable reaction temperature in the presence of a solid polysiloxane insoluble in the reaction medium and having sulphonic acid groups with intensive thorough mixing accompanied by continuous separation of the reaction water which forms, wherein the polysiloxane used as the catalyst in modified by treatment with a soluble aluminum, titanium or zirconium compound, and the spherical particles thereof have a diameter of 0.01 to 3 mm, a specific surface of 0.1 to 1200 m.sup.2 /g, a specific pore volume of 0.01 to 6.0 ml/g and a bulk density of 50 to 1000 g/l.

Abstract: A catalyst for the dehydrogenation of C.sub.6 -C.sub.15 paraffins is disclosed. The catalyst contains, on support, at least one platinum group component, at least one promoter component from the group tin, germanium and lead, and at least one additional modifier. The additional modifier contains at least one alkaline earth metal. The stability of the catalyst is essentially higher than that achieved by conventional use of an alkali metal.

Abstract: Disclosed are shell catalysts which contain, on powdered or shaped supports, one or more metals from groups VIII and IB of the Periodic Table of Elements. The catalysts are obtained by coating the support with the catalytically active metals in aqueous solutions of mono- or bimetallic colloids of these metals, wherein the colloids are stabilized by highly hydrophilic surfactants.

Abstract: A process for the production of bis(silylorganyl)-polysulphanes of the formula(R.sup.1 R.sup.2 R.sup.3 SiR.sup.4).sub.2 S.sub.x (I)in whichR.sup.1, R.sup.2, R.sup.3 : can be identical or different from each other, and are branched and unbranched alkyl and/or is an alkoxy groups with 1 to 8 cations, wherein at least one alkoxy group is present, aryl residues, in particular phenyl, toluyl, benzyl;R.sup.4 : means a divalent alkylidene residue having a chain length of 1-8 C atoms, or--(CH.sub.2).sub.n --C.sub.6 H.sub.4 --(CH.sub.2).sub.n --(n=1 to 4);by reacting haloalkylalkoxysilanes orhaloalkoxysilanes of the formulaR.sup.1 R.sup.2 R.sup.3 SiR.sup.4 X (II)with a polysulphide of the formulaM.sub.2 S.sub.x (III).In a first stage of the reaction, dehydrated polysulphide is obtained by reacting a sulphide hydrate containing water of crystallization with sulphur under a vacuum at a temperature of 60.degree. to 300.degree. C.

Abstract: A catalyst for the dehydrogenation of C6.sub.6 -C.sub.15 paraffins is disclosed. The catalyst contains, on a support, at least one platinum group component, at least one promoter component from the group tin, germanium and lead, and at least one additional modifier. The additional modifier contains at least one alkaline earth metal. The stability of the catalyst is essentially higher than that achieved by conventional use of an alkali metal.

Abstract: A process is disclosed for continuously hydrogenating unsaturated fats, fatty acids or fatty acid esters on a shaped catalyst in a solid bed. The reactants flow over the catalyst in the presence of a medium or solvent mixture in supercritical conditions. This leads to considerably improved activity and selectivity of the hydrogenation reaction compared with conventional trickle bed hydrogenation processes.

Abstract: A process for the impregnating and priming treatment of mineral building materials of synthetic or natural origin using aqueous suspensions or solutions which contain at least one silicon-containing ion exchanger of the formula?(YO).sub.3 Si(CH.sub.2).sub.x !.sub.n EX (I)or an oligomer of this compound, whereinx signifies an integer of 1 to 12,n signifies an integer of 1 to 3, depending on EY signifies H, Na, K, Mg, Ca, BaE signifies a cation-exchanging or anion-exchanging group, andX signifies H.sup.+ or an alkali cation or alkaline earth cation or OH.sup.- or an anion,in a quantity of from 0.1 to 70% by weight, particularly from 10 to 30% by weight, based on the total quantity of the solution or suspension, with the treatment being carried out in a single stage or in multiple stages, optionally combined with a treatment with aqueous or organic emulsions or solutions containing hydrolyzable silanes and/or siloxanes.

Abstract: Disclosed are aqueous solutions of polymeric organosiloxane-ammonium compounds which possess ion exchange properties and a method for manufacture from solid organopolysiloxanes. The solutions are used in the hydrophobing treatment of inorganic materials and building materials.

Abstract: Organosiloxane copolycondensates are disclosed and which are optionally cross-linked by means of cross-linking agents containing Si, Ti, Zr and/or Al and contain the units ##STR1## wherein R.sup.1 -R.sup.5 are ##STR2## wherein R.sup.6 is alkylene with C.sub.1 -C.sub.10 bound directly to N or X, cycloalkylene with C.sub.5 -C.sub.8 or ##STR3## X is >N--H, >N--CH.sub.3, >N--C.sub.2 H.sub.5, --S--, --S.sub.2 --, --S.sub.3 --, --S.sub.4 --, ##STR4## wherein R" is H or alkyl with C.sub.1 -C.sub.5. These products are in the form of spherical particles with a diameter of 0.01 to 3.0 mm, a specific surface of up to 1000 m.sup.2 /g, a specific pore volume of up to 6.0 ml/g and a bulk density of 50 to 1000 g/l. Different methods of preparing the formed copolycondensates are disclosed as well as use of certain compositions for removing metals from solutions and/or for the adsorption of gaseous organic compounds and/or of water vapor.