Abstract: A process for removing methacrolein from liquid phase P comprising acrylic acid as a main constituent and target product, and methacrolein as a secondary component in which the removal is effected by crystallization, the acrylic acid accumulating in the crystals formed and the methacrolein in the remaining mother liquor.

Abstract: A process for preparing an organic target compound by heterogeneously catalyzed gas phase partial oxidation of an organic precursor compound with molecular oxygen in two oxidation reactor lines operated in parallel and removal of the target compound from the mixture of the product gas streams in a workup line, wherein the catalyst charge of one of the oxidation lines comprises a portion of catalyst over which the heterogeneously catalyzed gas phase partial oxidation has already been carried out for longer than over the portions of catalyst of the catalyst charge of the other oxidation reactor line.

Abstract: A fuel composition comprising a major amount of a gasoline fuel having a maximum sulfur content of 150 ppm by weight and a minor amount of at least one gasoline fuel additive having detergent action or having a valve seat wear-inhibiting action, wherein this gasoline fuel additive has at least one hydrophobic hydrocarbon radical having a number-average molecular weight (MN) of from 85 to 20 000 and at least one polar moiety, and wherein the fuel composition also has a content of at least one lower alkanol of from about 5 to 75% by volume.

Abstract: A chimney tray for a column for the thermal treatment of a liquid, comprising an upper tray and a lower tray which are spaced apart from one another, arranged substantially horizontally in the column, comprising chimneys, and also comprising drawing of the liquid via a drainage spout arranged at the edge of the chimney tray, wherein the upper tray and the lower tray have a minimum separation from one another of from 10 to 500 mm and, between the upper tray and the lower tray, a gas having a thermal conductivity of less than 0.5 watt/m/K has been incorporated.

Abstract: A process for removing methacrylic acid from liquid phase P comprising acrylic acid as a main constituent and target product, and methacrylic acid as a secondary component in which the removal is effected by crystallization, the acrylic acid accumulating in the crystals formed and the methacrylic acid in the remaining mother liquor.

Abstract: Graft polymer, comprising (A) a polymer graft skeleton with no mono-ethylenic unsaturated units and (B) polymer sidechains formed from co-polymers of two different mono-ethylenic unsaturated monomers (B1) and (B2), each comprising a nitrogen-containing heterocycle, whereby the proportion of the sidechains (B) amounts to more than 55 wt. % of the total polymer.

Abstract: The present invention relates to a process for the preparation of iron-doped ruthenium catalysts supported on carbon, and their use for the selective liquid phase hydrogenation of carbonyl compounds to give the corresponding alcohols, in particular for the hydrogenation of citral to give geraniol or nerol or of citronellal to give citronellol.

Abstract: Process for preparing homopolymers of ?-methylstyrene, or copolymers of ?-methylstyrene and comonomers, by anionic polymerization in the presence of an initiator composition, which comprises using an initiator composition in which potassium hydride and at least one organylaluminum compound are present.

Abstract: A reactor (1) for gas/liquid or gas/liquid/solid reactions having a vertical longitudinal axis and an inlet (2) for a liquid or liquid/solid feed stream in the upper region of the reactor and an inlet (3) for a gaseous stream in the lower region of the reactor (1), wherein the gaseous stream (3) is conveyed through a gas distributor module (9) which is made up exclusively of straight tube sections (14, 15).

Abstract: An ascorbic acid derivative of the formula Ia: where the variables independently of one another have the following meanings: R1 and R2 independently of one another are hydrogen or C1-C20-acyl; R3 is hydrogen or a cation selected from the group consisting of NH4+, alkali metal and alkaline earth metal cations; R4 is C1-C6-alkoxycarbonyl, and a process for its preparation.

Abstract: Novel benzamidoxime derivatives, processes and intermediates for their preparation and their use as fungicides are described. In the context of the present invention, benzamidoxime derivatives are compounds of the formula I where: A is an aryl or hetaryl radical; Y is a straight-chain or branched C1–C4-alkylene group, where one carbon can be replaced by oxygen, nitrogen or sulfur or by a cyclopropyl group; Rn1 are one to five identical or different radicals from the group consisting of: hydrogen, halogen, C1–C6-alkyl, C1–C6-alkoxy, C1–C4-haloalkyl, C1–C4-haloalkoxy, C1–C4-alkylthio, C1–C4-alkoxyalkoxy; R2 is unsubstituted or substituted phenyl-C1–C6-alkyl, thienyl-C1–C4-alkyl, or pyrazolyl-C1–C4-alkyl, Rp3 are one to five identical or different radicals from the group consisting of: hydrogen, halogen, C1–C6-alkyl, C1–C6-alkoxy, C1–C4-haloalkyl, C1–C4-haloalkoxy, C1–C4-alkylthio, C1–C4-alkoxyalkoxy, C1–C6-alkylcarbonyl; n is 0–5; p is, depending on the number of free valencies, 0–4.

Abstract: An antifreeze concentrate for cooling systems in fuel-cell drives which gives ready-to-use aqueous coolant compositions having a conductivity of at most 50 ?S/cm, based on alkylene glycols or derivatives thereof and containing one or more five-membered heterocyclic compounds (azole derivatives) having 2 or 3 hetero atoms from the group consisting of nitrogen and sulfur, which contain no or at most one sulfur atom and which may carry a fused aromatic or saturated six-membered ring.

Abstract: A process for isomerizing cis-2-pentenenitrile to trans-3-pentenenitrile in the presence of aluminum oxide as a catalyst, wherein the aluminum oxide has a BET surface area of at least 50 m2/g.

Abstract: A process for improving the intercoat adhesion in a multicoat paint system utilizing a primer coat, an aqueous basecoat, and a clearcoat, where the multicoat paint system has been produced by means of a wet-on-wet technique. The clearcoat is produced using a pseudoplastic powder clearcoat slurry prepared by a secondary dispersion process or a melt emulsification process. The aqueous basecoat material used to produce the aqueous basecoat comprises a dispersed graft copolymer whose particles are composed of a hydrophobic core of copolymerized olefinically unsaturated monomers and of a hydrophilic shell which comprises a polyurethane, wher said copolymer is prepared by free-radical (co)polymerization of the monomers in the presence of at least one polyurethane containing specially selected olefinically unsaturated groups.

Abstract: Aqueous dispersions composed of polycarbodiimides which carry substantially no carboxyl groups and I are obtained from polyisocyanates of the formula I OCN—(Rc—N?C?N)n—Rc—NCO (I) where Rc is a divalent hydrocarbon radical with or without urea, urethane, ester and/or ether groups, as is obtained by removal of the isocyanate groups from a simple organic isocyanate or from a prepolymer which contains urethane groups and, if desired, ether or ester groups and which carries terminal isocyanate groups, two or more radicals Rc present in the same molecule having identical or different definitions, and n being from 1 to 20, or II are of the formula (II) Rd—(Rc—N?C?N—Rc)n—Rd (II) where n is a number from 1 to 20, Rc is as defined for the formula (I), Rd is —NH2 and Re independently at each occurrence is C1 to C20 alkyl or alkenyl, C5 to C12 cycloalkyl, C6 to C20 aryl or C7 to C20 aralkyl, in which 1 to 4 hydrogen atoms of the radical Re may be substituted by substituents that are inert toward carbodiim

Abstract: The invention relates to a process for the continuous preparation of THF by reaction of a 1,4-butanediol-containing reaction mixture over a heteropolyacid catalyst which has not been predried, wherein the reaction mixture comprises 2-(4-hydroxybutoxy)tetrahydrofuran.

Abstract: The invention relates to a process for obtaining gold-colored aluminum oxide layers in which the coloring of the oxidized surface of the aluminum or aluminum alloys is carried out by an electrolytic process in an electrolyte comprising an alkanesulfonic acid and an alkanesulfonate of silver, and to the use of the gold-colored workpieces based on aluminum or aluminum alloys produced by this process for decorative purposes. The invention furthermore relates to an electrolyte solution for coloring the oxidized surface of aluminum or aluminum alloys gold by an electrolytic process, and to the use of an electrolyte comprising an alkanesulfonate of silver for coloring aluminum oxide layers based on aluminum or aluminum alloys gold in an electrolytic process.

Abstract: Molding compositions comprise A) from 1 to 98.8% by weight of at least one polyarylene ether sulfone, B) from 1 to 98.8% by weight of at least one thermoplastic polyamide, C) from 0.1 to 60% by weight of at least one filler, D) from 0 to 40% by weight of at least one impact-modifying rubber, E) from 0 to 40% by weight of one or more different additives, and F) from 0.1 to 30% by weight of at least one thermotropic polymer, where the total of the percentages by weight of components A to F is 100%, wherein component B has a viscosity number of from 180 to 350 ml/g (measured in a 0.5% strength by weight solution in 96% strength by weight sulfuric acid to DIN 53 727).

Abstract: Plastics comprise sterically hindered, esterified amine (I) which contains less than 100 ppm, based on the weight of (I), of titanium.

Abstract: The present invention relates to a method of storing a liquefied gas in a container containing a metal-organic framework material, the container filled with such a gas, a process for filling container and the use of the container to release the gas.