Abstract: The invention relates to a process for producing carbon fibres, in which polyacrylonitrile (PAN) is pyrolytically carbonized with liberation of hydrocyanic acid (HCN) to form carbon fibres and also a plant for carrying out the process. It is an object of the invention to make the process more economical. This is achieved by utilization of the hydrocyanic acid as material by collecting the hydrocyanic acid liberated and scrubbing it by means of an alkaline medium to give a liquor containing cyanide salt.

Abstract: A method for separating a particle mixture into a first and second fraction, the first fraction of particles having an electrical conductivity greater than the particles of the second fraction, by a) ionizing air to have the same polarity with a corona electrode; b) mixing the ionized air with a fluidized particle mixture containing two particle fractions with different electrical conductivities, to obtain a fluidized particle mixture ionized to have the same polarity; d) precipitating particles of the second fraction from the particle mixture on a collection electrode moving relative to the particle mixture, where the collection electrode is grounded or has an opposite charge to the corona electrode; e) removing particles adhered to the collection electrode as the second fraction; and f) obtaining the first fraction from particles of the particle mixture which do not adhere to the collection electrode.

Abstract: The invention relates to a pulverulent laundry and cleaning detergents ingredient, to a process for its preparation and to its use.

Abstract: The invention relates to a pulverulent laundry and cleaning detergents ingredient, to a process for its preparation and to its use.

Abstract: The present invention relates to water-soluble polymers built up of a) monoethylenically unsaturated dicarboxylic acids and/or their salts, b) monoethylenically unsaturated monocarboxylic acids and/or their salts, c) monounsaturated monomers which, after hydrolysis or saponification, can be converted into monomers having a hydroxyl group covalently bonded at the C—C-chain, d) monoethylenically unsaturated sulfonic acid groups or sulfate groups-containing monomers, and optionally e) further radically copolymerizable monomers, with the sum of the monomers of a) to e) amounting to 100%.

Abstract: A coating material and coating process for color coating articles, such as motor vehicle bodies, and coated articles produced therewith. The coating contains a paint vehicle composed of at least one curable liquid-crystal polymer (LCP), the colored appearance of the coating being determined by mesogens of the paint vehicle which exhibit an interference effect, the mesogens automatically aligning themselves substantially perpendicular to the surface of the article during application of the coating material and adopting a chiral-nematic configuration in which they form a helix having a pitch length which can be influenced by heat within a specified temperature range. The liquid-crystal polymers are such that they are not crosslinked by heat and also such that the temperature level at which the pitch length of the helix can be influenced is above the temperature at which the color coated article is used.