Abstract: Racemic malic acid can be fractionally crystallized, as a diastereomeric salt pair, from alcoholic solution or aqueous-alcoholic solution by using an optical antipode of 2-amino-butan-1-ol.

Abstract: Acid constituents, eg. H.sub.2 S and CO.sub.2 or their mixtures, are removed from industrial gases or natural gases by means of a washing agent which contains the methyl isopropyl ethers of polyethylene glycols. The washing can be carried out with simultaneous drying of the gas, especially in the case of natural gases, since the anhydrous ethers are able to absorb water.

Abstract: A process for the preparation of propylene homopolymers or copolymers by polymerizing the monomer or monomers in the gas phase in a centric stirred bed of finely divided polymer, with removal of the heat of polymerization by evaporative cooling, the temperature in the polymerization zone being regulated by measuring the temperature continuously and causing any change therein to trigger a change in the amount of liquid monomer, evaporating in the reaction zone, which is introduced per unit time, in which process(1) the radius and height of the centric stirred bed are in a particular ratio to one another, (2) the finely divided polymer in the centric stirred bed is caused to move upward in the peripheral zone of the bed and downward in the central zone of the bed, (3) the temperature in the polymerization zone is regulated by simultaneously measuring it at (3.1) one or more points of the inner part of the stirred bed and (3.

Abstract: Azolyl-silyl-glycol ethers of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 denote C.sub.1-4 -alkyl or phenyl, R.sup.4 denotes C.sub.1-4 -alkyl, halogen or phenyl, m denotes one of the integers 0, 1, 2 and 3, and X and Y denote CH or N, salts thereof which are tolerated by plants, their manufacture, and their use as fungicides.

Abstract: Thermoplastic molding materials which contain a copolymer which has been made impact-resistant with a rubber. The copolymer is produced by polymerizing a mixture of a monovinyl-aromatic compound and an acrylic acid derivative or methacrylic acid derivative in the presence of a rubber. The folding materials contain a specific proportion of soft component. The diameter of the particles of the soft component, and the swelling index of the soft component, lie within a specific range, and the tensile strength of the molding material is higher than the yield strength.

Abstract: A process for the preparation of high-viscosity polyvinylpyrrolidone, wherein an aqueous polyvinylpyrrolidone solution is subjected to a heat treatment in the presence of a water-insoluble peroxide and in the absence of oxygen, and thickeners containing the polyvinylpyrrolidone thus prepared.

Abstract: Dye mixtures, containing dyes of the formula I ##STR1## where X is hydrogen, chlorine or bromine,R.sup.1 is hydrogen, methoxy, ethoxy or phenoxy,R.sup.2 is hydrogen, methyl, ethyl, n-propyl or iso-propyl andR is ##STR2## where R.sup.3 is allyl, methallyl, crotonyl, prenyl or benzyl,R.sup.4 is C.sub.1 -C.sub.5 -alkyl, allyl, methallyl, crotonyl, prenyl or benzyl andR.sup.4 is C.sub.1 -C.sub.5 -alkyl,the mixtures containing not less than 60% of dyes wherein R is ##STR3## or NHC.sub.2 H.sub.4 CN, from 0 to 40% of one or more dyes wherein R is ##STR4## and from 0 to 40% of one or more dyes wherein R is ##STR5## the two last-mentioned components accounting for not less than 5% of the mixture.The mixtures are exceptionally useful for dyeing polyesters.

Abstract: Oxyalkylated 1,3-bis-aryl-glycerol ethers of the formula ##STR1## where R and R.sup.1 are aromatic substituents, R.sup.2 is --CH.sub.3 or --C.sub.2 H.sub.5, R.sup.3 is --H or --CH.sub.3, n is from 0 to 10 and m is from 8 to 50.The compounds of the formula I are used as emulsifiers, preferably in the preparation of print pastes.

Abstract: Substituted piperidino-alkyl ethers of 3-hydroxy-thiophene-2-carboxylic acid esters and their physiologically tolerated addition salts with acids, processes for their preparation, and pharmaceutical formulations which contain these compounds and which may be used in the treatment of cardiac arrhythmias.

Abstract: A novel process for the preparation of phenylpropyl halides of the formula ##STR1## by reacting the corresponding phenylpropyl halides, substituted only by R.sup.2 and R.sup.1, with an alcohol, alkyl halide or olefin; and phenylpropyl halides where R.sup.3 has certain meanings.

Abstract: Disclosed is the polyelectrolytic titration of serum lipoproteins, the negative surface charge of the latter being determined quantitatively by adding an excess amount of a polycation in aqueous solution to the particular serum lipoprotein and then back-titrating the positive charge, of the polycation, which has not been neutralized by the negative surface charge, against a chromotropic polyanion, in the presence of a metachromatic dye as the indicator. The method according is used for the diagnosis of lipometabolic disorders.

Abstract: Magnetic recording media comprising a non-magnetic base and, applied thereto, one or more magnetizable layers based on an anisotropic magnetic material finely dispersed in an organic binder containing an ionomeric polyurethane elastomer, wherein the binder used is a substantially aqueous polyurethane dispersion prepared from a polyurethane solution which has been obtained by reacting a polyisocyanate with an organic polyhydroxy compound in the presence of an organic solvent that is inert to isocyanate groups.

Abstract: Agents for regulating plant growth containing ketone derivatives bearing an azolyl radical in the .beta.-position to the keto group, and a process for regulating plant growth with these compounds.

Abstract: Methylene-bis-phenylcarbamic acid esters and polymethylene-polyphenylcarbamic acid esters are prepared by reacting N-phenylcarbamic acid esters with formaldehyde, formaldehyde derivatives or formaldehyde donors in the presence of carboxylic acids having a pK.sub.a of less than 4.

Abstract: Novel phenylcarbamic acid chlorides, and their preparation by reacting N-mono-substituted phenylenediamines with excess phosgene and then reacting the products with thioalcohols, alcohols, hydroxylamines or amines.The novel phenylcarbamic acid chlorides of the formula I obtainable by the process of the invention are valuable intermediates for the preparation of crop protection agents, especially herbicides.

Abstract: To prepare a colored pigment which has a metallic luster and consists of a metallic core whose surface is at least partially covered with an iron oxide, iron pentacarbonyl is oxidized with oxygen in a fluidized bed of the metallic cores at above 100.degree. C. The amount of iron pentacarbonyl vapor introduced into the fluidized bed must not exceed 5% by volume, based on the total gases introduced into the fluidized bed over the same period of time.

Abstract: A process for the preparation of water-soluble polymeric crosslinking agents by a two-stage reaction of di-secondary diamines with epichlorohydrin and/or dichlorohydrin, wherein, in the first stage, di-secondary diamines are condensed with epichlorohydrin and/or dichlorohydrin in a molar ratio of from 1:0.5 to 1:1 at a pH of from 9 to 12, and in the second stage the condensates obtained in the first stage are reacted with additional epichlorohydrin and/or dichlorohydrin at a pH of from 4 to 8.5. The water-soluble condensates thus obtained are crosslinking agents for polyamines, polyamidoamines, ethyleneimine-modified polyamidoamines and polyether-amines. The crosslinking reaction gives water-soluble condensates, which possess a high cation activity and may be used as retention aids, drainage aids and flocculants in the manufacture of paper.

Abstract: A process for the continuous preparation of isatoic anhydrides by two-stage reaction of an alkali metal phthalamate and/or alkali metal phthalimidate with an alkali metal hypohalite, the first stage being carried out substantially adiabatically and both stages being carried out at high flow rates, wherein phthalimide and/or phthalamic acid is first dissolved in a certain amount of an alkali metal hydroxide solution, the resulting solution is mixed with a hypohalite and reacted at a particular temperature, acid is then added and the reaction is completed at a particular temperature. The compounds obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents and scents.

Abstract: A selective process for the preparation of 1-aminoanthraquinones from the corresponding 1-aminoanthraquinone-2-carboxylic acid by decarboxylation in an acid solution in the presence of iron or zinc as a catalyst.

Abstract: New isoxazolylcarboxanilides of the formula ##STR1## where R.sup.1 is methyl, ethyl or chlorine, R.sup.2 is hydrogen, methyl, ethyl, fluorine, chlorine or bromine, R.sup.3 is methyl or ethyl, and R.sup.4 is hydrogen, methyl or ethyl.These compounds have a fungicidal action and are suitable for combating fungi.