Abstract: Amines are prepared by hydrogenation of the corresponding nitroaromatics in a vertical reactor whose length is greater than its diameter and which has in its upper region a downward-directed jet nozzle via which the reaction mixture and, if desired, part of the starting materials are introduced, has an outlet at any point on the reactor via which the reaction mixture is conveyed in an external circuit by means of a transport device back to the jet nozzle and has a flow reversal in its lower region, wherein at least part of the hydrogen and/or nitroaromatic starting materials used is fed into the liquid phase of the reactor in such a way that they travel upward in the liquid phase.

Abstract: A reactor (1) for preparing phosgene by gas-phase reaction of carbon monoxide and chlorine in the presence of a solid catalyst, which reactor has a bundle of parallel catalyst tubes (2) aligned in the longitudinal direction of the reactor whose ends are fixed in tube plates (3) and have a cap (4) at each end of the reactor (1), and has deflection plates (6) which are aligned perpendicular to the longitudinal direction of the reactor in the intermediate space (5) between the catalyst tubes (2) and leave free passages (7) located alternately opposite one another on the interior wall of the reactor, and in which the catalyst tubes (2) are charged with the solid catalyst, the gaseous reaction mixture is passed from one end of the reactor via one cap (4) through the catalyst tubes (2) and is taken off from the opposite end of the reactor (1) via the second cap (4) and a liquid heat transfer medium is passed through the intermediate space (5) around the catalyst tubes (2), where the reactor (1) has no tubes in the

Abstract: Incorporation of crosslinked polyvinylpyrrolidone in a specific particle composition as a disintegrant in compact particulate laundry detergents or cleaning products, such a particle composition and the compact particulate laundry detergents themselves, a process for preparing such a compact particulate laundry detergents or cleaning products, and a process for preparing specific particle compositions.

Abstract: A process is provided for preparing light-colored isocyanates which can be used for preparing urethane compounds, in particular polyurethanes, for example polyurethane foams.

Abstract: The present invention relates to a process for preparing 5-alkoxy-substituted oxazoles, in particular for preparing 4-methyl-5-alkoxy-substituted oxazoles and also a process for preparing pyridoxine derivatives.

Abstract: Complexes of the formula I, where M is an element of group 6 to 10 of the Period Table of the Elements, preferably Ni, can be used for the polymerization and copolymerization of olefins, for example in suspension polymerisation processes, gas-phase polymerization processes, bulk polymerization processes or emulsion polymerization processes.

Abstract: Use of associative thickeners based on polyurethane and/or dipropylene glycol monoalkyl ethers for suppressing defects in color and/or effect multicoat paint systems, or their touch-up paints.

Abstract: A process for printing or coating a substrate with a liquid-crystalline composition and at least one non-liquid-crystalline print or coating as a multilayer and a substrate produced by this process is described. The liquid-crystalline composition contains at least one compound having two polymerizable groups and at least one compound having only one polymerizable group, and optional further additives. The non-liquid-crystalline print or coating contains one or more IR- or UV-absorbent or fluorescent dye or pigment. The process and the printed substrate are useful in producing counterfeiting-proof marking of articles.

Abstract: A process for preparing 1,2-dichloroethane which comprises (A) feeding an ethane-containing feed gas stream into a dehydrogenation zone and dehydrogenating ethane to ethane to give a product gas stream comprising ethane, ethane and secondary constituents, (B) feeding the ethan- and ethene-containing dehydrogenation product gas stream as a single stream or a plurality of substreams, optionally after having separated off secondary constituents, into one or more chlorination zones, chlorinating ethene to 1,2-dichloroethane to give one or more product gas streams comprising 1,2-dichloroethane, ethane and possibly further secondary constituents, isolating 1,2-dichloroethane and one or more ethane-containing circulating gas streams and recirculating the ethane-containing circulating gas stream or streams to the ethane dehydrogenation.

Abstract: The invention relates to a process for preparing Grignard compounds of the formula I. The invention additionally relates to compounds of the formula I and to polymer-bound compounds of the formula Ia. The invention further relates to the use of the process for preparing substance libraries and to the use of the compounds of the formulae I and Ia in chemical synthesis.

Abstract: A bodywork part (2) is provided with an integrated antenna arrangement (4) and with a carrier unit (8) on which the antenna arrangement (4) is detachably arranged. This construction permits an antenna to be integrated and replaced easily.

Abstract: Provided is a curable coating composition comprising a reactive compound having one or more structures of the formula: wherein X is a primary carbamate group, Y is a hydroxy or halide group, n is an integer of 2 or more, n? is an integer of 1 or more, and R0, R1, R2, R3, R4 and R5 may be H or a group selected from alkyl groups, aliphatic groups, cycloaliphatic groups, aromatic groups and mixtures thereof, with the provisos that at least one R1 or R2 group is selected from the group consisting of aliphatic groups, cycloaliphatic groups, aromatic groups, and mixtures thereof, and in substantially all structures primary carbamate group X is attached to a carbon atom having a lower degree of substitution than a carbon atom to which functional group Y is attached.

Abstract: The invention described herein relates to a process for removing solids from tubes of a tube bundle heat exchanger, wherein a drill driven by a drilling machine is inserted into a tube of the tube bundle heat exchanger and clears out solids present in the tube. In a first variant of the process according to the invention, the drill is a spiral drill and has, cut out in the outer casing of the drill, a spiral conveyor groove in which the solids particles loosened and isolated by the drill tip on insertion of the drill into the tube can be transported out of the tube. More preferably, the drill is a hollow drill 10 which is provided with a substantially circular drill tip 11 and has a central recess running along the rotational axis in the longitudinal direction of the drill and opening into the drill tip 11 at the free end of the drill. At the drill tip 11 are provided toothlike projections 12.

Abstract: The present invention describes a process for preparing (meth)acrylic esters by acid-catalyzed esterification of (meth)acrylic acid or by transesterification of (meth)acrylic esters with alcohols, by adding the (meth)acrylic acid or the (meth)acrylic ester at a metering rate of less than 250 g per hour and liter of reactor volume and/or using at least 0.2 mmol of polymerization inhibitor per kg of alcohol and per meq/kg of peroxid number of the alcohol determined by the Sully method and/or thermally treating the alcohol in the absence of water before the esterification or transesterification.

Abstract: A process for distillative removal of ammonia from solutions (I) which include a lactam and ammonia comprises effecting said removal in a distillation apparatus (a) at an absolute pressure of less than 10 bar.

Abstract: A clearcoat composition and method reduce the ability of rain to bead on a film of the clearcoat. The clearcoat includes a resin, a cross-linking agent reactive with the resin, and a water-soluble surfactant. Upon exposure of the film to the rain, the surfactant reduces the ability of the rain to bead on the film and certain properties, such as resistance to etch from acid rain, are improved.

Abstract: A description is given of a polymer dispersion comprising i) polymer particles dispersed in an aqueous medium and composed of units of ethylenically unsaturated monomers, ii) a water-soluble polymeric polyelectrolyte which along a polymeric backbone carries a large number of ionic groups of uniform charge character or groups which can be ionized to such groups, and iii) an ionic surfactant which carries an ionic group having a charge character opposite to that of the polymeric polyelectrolyte, or a group which can be ionized to such a group. The polymer dispersion can be coagulated by simple dilution with water.

Abstract: A coil coating composition producing a coil coating with excellent properties at a lower peak metal temperature includes (a) a first, branched polyester prepared by condensation of a polyol component consisting essentially of a flexibilizing diol, 2-methyl-1,3-propanediol, and a polyol having at least three hydroxyl groups and an acid component consisting essentially of isophthalic acid; (b) a second, essentially linear polyester prepared by condensation of a polyol component consisting essentially of a flexibilizing diol and 2-methyl-1,3-propanediol and an acid component consisting essentially of isophthalic acid; and (c) a crosslinking agent.

Abstract: In a process for mixing reactant streams (1, 2; 5) to produce a product stream (10) using a mixing configuration (15, 16) having a number of reactant feed points, an excess component stream of one reactant is divided into two reactant substreams (1, 2) and fed into the suction region (3, 4) of a mixing space (12) at right angles to a deficient component (5) entering the mixing space (12).

Abstract: The invention relates to a method of preparing 1-alkyl-3-aryl-5-difluoromethoxy-1H-pyrazoles of the formula (I), wherein aryl represents a mono- or polysubstituted phenyl ring, and R1 represents C1-C4 alkyl. The inventive method is characterized by reacting, in a first reaction step, a ?-ketoester of the general formula (II) with hydrazine and by successively reacting the reaction product obtained with chlorodifluoromethane and a compound R1-L, wherein R1 has the meanings indicated above and L represents the leaving group of a nucleophilic displacement reaction.