Abstract: A process for rectificatively separating fluids comprising (meth)acrylic monomers in a rectification column by directly cooling the vapor comprising (meth)acrylic monomers rising to the top of the rectification column to form top condensate comprising (meth)acrylic monomers, the condensation space at the top of the column being separated from the region of the rectification column containing the separating internals only by at least one chimney tray from which the top condensate formed is removed from the rectification column, which comprises effecting the direct cooling of the vapor in the condensation space in at least two spray zones which are spatially successive and are flowed through by vapor by spraying supercooled top condensate comprising added polymerization inhibitor, and the temperature of the sprayed supercooled top condensate becoming lower from spray zone to spray zone in the flow direction of the vapor.

Abstract: The invention relates to a polymer synthesized

Abstract: The present invention relates to a process for the preparation of hydrogen peroxide from oxygen or oxygen-delivering substances and hydrogen or hydrogen-delivering substances in the presence of at least one catalyst containing a metal-organic framework material, wherein said framework material comprises pores and a metal ion and an at least bidentate organic compound, said bidentate organic compound being coordinately bound to the metal ion. The invention further relates to a novel material consisting of said metal organic framework material wherein the material is brought in contact with at least one additional metal.

Abstract: Acrylic acid or methacrylic acid is purified by crystallization to obtain crystals and a mother liquor, by a process in which the crystals are washed with a wash liquid containing the acid and having a temperature from 15 to 40° C. Furthermore, a process for the preparation of acrylic acid or methacrylic acid comprises the abovementioned purification process.

Abstract: A process for working up mixtures containing (meth)acrylic acid and/or (meth)acrylic ester in a column for distilling, rectifying and/or fractionally condensing in the presence of at least one polymerization inhibitor and an oxygen-containing gas, wherein the partial oxygen pressure p(O2) in the gas phase of the entire column is from 2 to 5 hPa.

Abstract: The present invention provides a process for preparing aqueous copolymer solutions by polymerizing ethylenically unsaturated compounds in the presence of foam inhibitors.

Abstract: The present invention relates to the use of polymerizable liquid-crystalline compounds for the production of optical elements having color- and polarization-selective reflection, and to optical elements comprising these compounds in monomeric or polymerized form.

Abstract: Disclosed is an NOx storage catalyst in honeycomb form wherein the honeycomb is formed from at least one alkaline earth metal sulfate as precursor compound of the storage material, optionally in combination with the customary concomitant and assistant materials and/or optionally at least one stabilizer.

Abstract: The invention relates to reactive dyes containing a halobenzene nucleus and, in particular, reactive dyes containing a halobenzene nucleus and two or more reactive components.

Abstract: 1.

Abstract: An aqueous polymer dispersion whose polymer, present in disperse distribution, is composed in free-radically polymerized form of

Abstract: Dye preparations comprising, based in each case on the weight of the preparation, from 0.1 to 30% by weight of one or more dyes from the class of the mono- or polyazo dyes containing no acidic groups, from 0.1 to 20% by weight of a dispersant based on an arylsulfonic acid-formaldehyde condensate or from 0.1 to 20% by weight of a water-soluble dispersant based on alkoxylated phenols with or without water, and their use as inks in the inkjet process and for textile sublimation transfer printing.

Abstract: Described is a process for preparing aqueous polymer dispersions by at least two-stage free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers, comprising:

Abstract: Microcapsules comprising one or more lipophilic substances as core material and a polymer as capsule shell, which are obtainable by free-radical polymerization of an oil-in-water emulsion comprising

Abstract: The invention relates to a continuous process, carried out in two steps, for the cyanoalkylation of compounds having one or more NH functions by reaction thereof with carbonyl compounds and hydrocyanic acid, in which the first step is carried out without pressure at a temperature which is below the boiling point of the reaction mixture.

Abstract: The present invention relates to a solvent-free pigmented formulation comprising

Abstract: Agglomerated polymer particles of finely divided, water-soluble or water-swellable polymers containing ammonium carboxylate groups are prepared by azeotropic removal of water from water-in-oil emulsions of the water-soluble or water-swellable polymers which contain ammonium carboxylate groups in the presence of from 0:1 to 40% by weight, based on the polymers, of polyalkylene glycols which have an agglomerating effect and which are obtainable by an addition reaction of C2-C4-alkylene-oxides with alcohols, phenols, amines or carboxylic acids and contain at least two polymerized alkylene oxide units and additionally of from 0.1 to 20% by weight, based on the polymers, of protective colloids which are obtainable by free radical copolymerization of C8-C40-monoolefins with monoethylenically unsaturated C4-C6-dicarboxylic anhydrides by a mass polymerization method at from 80 to 300° C.

Abstract: Polymerizable compounds are prepared and/or worked up using at least one liquid ring pump by a process in which a working liquid which contains a material stream from the preparation and/or working-up of the polymerizable compound is used in a liquid ring pump.

Abstract: An apparatus having at least two tubes (1, 2) which are arranged coaxially inside one another and project partially into the reactor is proposed for the production of synthesis gases by partial oxidation of carbon-containing fuels in a reactor without internals. The inner tube (2) has a device (8) for supplying the fuels and the outer tube (1) has a device (9) for supplying the combustion air. At the end, the tubes are conically tapered, so that a nozzle-like outlet opening (3) and an annular nozzle gap (4) are formed. To improve the resistance to wear, the tubes (1, 2) are in each case composed o two sections (1a, 1b) and (2a, 2b), the tube sections (1b, 2b) which extend into the reactor consisting of a high-melting metal alloy which is able to withstand high temperatures. The tube sections can be joined together in a positively and nonpositively locking manner by a screw thread or a flange structure (11, 12).

Abstract: An emulsifier mixture comprising an emulsifier I of the formula 1