Abstract: Cyclic methyl fumaraldehyde monoacetals and a process for their production by oxidation of the corresponding methylbut-2-en-4-ol-1-al acetal with an H.sub.2 SO.sub.4 -containing solution of chromic acid in acetone. The new compounds are of considerable interest as intermediates in the synthesis of carotinoids.

Abstract: Production of aldehydes and alcohols by hydroformylation of olefinically unsaturated compounds with carbon monoxide and hydrogen at elevated temperature and superatmospheric pressure in the presence of carbonyl complexes of metals of group 8 of the Periodic System which have been modified with trisubstituted phosphines in which two substituents are lower alkyl radicals and the third substituent is a higher aliphatic radical. Aldehydes and alcohols are known to be solvents; they are used on a large scale for the production of plasticizers for polyvinyl chloride.

Abstract: Process for dehairing skin and hide with mercapto compounds in the presence of an alkaline medium in a short liquor.

Abstract: The invention relates to a process for the production of anthraquinone by catalytic oxidation of indans or diphenylmethane derivatives with oxygen in the presence of a vanadium (V) compound with or without one or more than one compund of potassium, boron, thallium, antimony and/or caesium. Anthraquinone which can be prepared by the process according to this invention is a valuable starting material for the production of dyes and pesticides.

Abstract: A process for the production of 2,3,6-trimethylphenol in which diethyl ketone is reacted in the presence of a basic reagent with crotonaldehyde or methyl vinyl ketone (or a compound which in the presence of a basic reagent is converted into crotonaldehyde or methyl vinyl ketone) and the 2,5,6-trimethyl-2-cyclohexen-1-one or 2,3,6-trimethyl-2-cyclohexen-1-one formed is dehydrogenated.

Abstract: The production of formaldehyde by oxidizing dehydrogenation of methanol in the presence of a silver catalyst using air which has been washed with a solution of an alkali metal compound in water and methanol in specific proportions. The product is a disinfectant, tanning agent, reducing agent and a starting material for the production of synthetic resins, adhesives and plastics.

Abstract: The invention relates to the manufacture of acicular cobalt-modified .gamma.-iron(III) oxide by coating an acicular .alpha.-iron(III) oxide or its hydrate with an inorganic protective coating, subsequent reduction to magnetite at 350.degree. to 650.degree. C, application of the cobalt compound to this magnetite or to the .gamma.-iron(III) oxide obtained therefrom by oxidation, and subsequent heat treatment at 80.degree. to 300.degree. C, if necessary with simultaneous oxidation of the magnetite to the corresponding .gamma.-iron(III) oxide. This iron oxide has high coercivity and can be used as the magnetic component in magnetic recording media for recording high frequencies without having the disadvantage of thermal and mechanical instability.

Abstract: Process of preparing a concentrated solution of a water-soluble anionic azo dye containing 1 to 4 sulfonic acid groups by diazotization and coupling of a diazo and coupling component, respectively, in the solvent or solvent mixture required for the concentrated solution which should have as essential solvents water and/or water-soluble or water-miscible organic solvents other than carboxylic acids. Diazotization is carried out with a nitrous acid ester of a hydroxy-substituted aliphatic hydrocarbon, e.g., an alkyl nitrite. The process provides highly stable concentrated or stock solutions of unlimited miscibility with water for use in continuous dyeing methods.

Abstract: The continuous countercurrent extraction of polylactam granules with hot water in an extraction zone for the removal of monomer and/or oligomers, the extraction zone being subdivided into subzones by at least one heating zone. The density of the extract-containing water differs by at least 0.0002 between the subzones.

Abstract: Self-adhesive coatings are produced on sheet materials in a simple and particularly trouble-free manner by applying to said materials mixtures of1. acrylic ester copolymers containing polymerized units of unsaturated carboxylic acids or hydroxyl-containing vinyl monomers in addition to polymerized units of higher alkyl acrylates,2. melamine/formaldehyde resins and, optionally,3. solvents for components (1) and (2),And evaporating off any solvents.

Abstract: Production of aldehydes and alcohols by oxo synthesis involving the reaction of olefinic compounds with carbon monoxide and hydrogen at elevated temperatures and under elevated pressures in the presence of amine-modified carbonyl complexes of cobalt or rhodium. Diamino diphenyl alkanes are used as modifying agents.

Abstract: Azo dyes having 2,6-diaminopyridine derivatives as coupling components which preferably bear cyano or carbamoyl as substituents in the 3-position. The dyes give brilliant yellow to blue colorations, particularly on synthetic polyesters, which are distinguished by outstanding fastness properties.

Abstract: 2,6-Dinitro-4-trifluoromethylanilines which are N,N-di-substituted by lower chloroalkyl and by lower alkyl, allyl, lower alkoxyalkyl or lower hydroxyalkyl; and herbicide uses thereof.

Abstract: Aqueous impregnating resins based on a condensate of melamine and formaldehyde containing a lower fatty acid dialkyl amide such as dimethyl acetamide either in solution or as part of the condensate, and a process for the manufacture thereof.

Abstract: Impact-resistant thermoplastic molding materials prepared from a rigid component and a soft component. The rigid component consists of polystyrene, the soft component consists of a mixture of a polyolefin with a copolymer of a vinylaromatic and a diene hydrocarbon which has been prepared by anionic solution polymerization and which may have been hydrogenated. The molding materials may be used for the production of molded parts for use in domestic appliances, automobiles and refrigerators.

Abstract: A process for the manufacture of block or graft copolymers of polyalkylene oxides and vinylaromatic polymers or diene polymers. The block or graft copolymers are manufactured by reacting vinylaromatic polymers or diene polymers bearing methyl methacrylate end groups with polyalkylene oxides bearing alkali metal alcoholate end groups. The block or graft copolymers may be used as antistatic agents for plastics, as coating materials for non-woven webs, as intermediates in the manufacture of polyurethanes and as surfactants, protective colloids or emulsifiers.

Abstract: 3,5-DIETHYLPHENYL-N-methylcarbamate, which has a good insecticidal action, and a process for controlling insects with this compound.

Abstract: A process for the production of high molecular weight .alpha.,.beta.-unsaturated aldehydes by alkylation of the .gamma.-carbon atom of a lower molecular weight .alpha.,.beta.-unsaturated aldehyde with a substituted allyl alcohol which has a chain branching in the 4-position carbon atom or a phenyl radical in the 4-position or of a corresponding allyl alcohol carboxylic ester at elevated temperature in the liquid phase.The products are valuable intermediates for the production of natural substances and odorants.

Abstract: An improved process for the production of 2-ethylhexanol-(1) which comprises contacting 2-ethylhexen-(2)-al-(1) in an inert solvent with hydrogen at pressures of 1 to 500 atmospheres gauge and at temperatures of 80.degree. to 200.degree. C in the presence of a hydrogenation catalyst consisting essentially of cobalt and/or nickel and of copper and manganese and 0.5 to 15% by weight calculated as phosphorus pentoxide and based on the metal content of said catalyst exclusive of support of pyrophosphoric acid or polyphosphoric acid in free form and/or in the form of at least one salt of said metals. The alcohol produced is used as a solvent or for the production of plasticizers for polyvinyl chloride.

Abstract: A process for the manufacture of finely divided polyester-imide powders wherein solutions of polyester-imides in organic solvents are solidified by cooling, the solvent is removed by sublimation and the solid product is pulverized. The powders may be used, as aqueous dispersions, to produce heat-resistant coatings on metallic conductors.