Abstract: C.sub.2 -C.sub.4 -olefins are prepared by catalytic conversion of methanol and/or dimethyl ether in the presence of a zeolite catalyst at elevated temperatures, by a process in which the catalyst used is a pure borosilicate zeolite which has been tableted or extruded without a binder and treated with hydrofluoric acid and hydrochloric acid. The treatment of the catalyst with hydrofluoric acid is carried out using 0.001-1N HF, and that with hydrochloric acid is carried out using 3-25% strength acid. The time-on-stream of the catalyst is improved.

Abstract: Dihydro-4,4-dimethylfuran-2,3-dione is prepared by oxidation of racemic dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone by a process in which the oxidation is carried out by gradually adding powdered calcium oxide to a solution of racemic dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone and chlorine in the inert organic solvent.

Abstract: A process for the continuous preparation of glyoxal by oxidation of ethylene glycol, in which the ethylene glycol, oxygen and an inert gas are passed, at from 450.degree. to 800.degree. C., over a catalyst consisting of one or more layers of copper crystals and one or more layers of silver crystals, the copper and silver crystals having a particle size of from 0.1 to 2.5 mm.

Abstract: Graft polymer dispersions are prepared by polymerizing aqueous solutions of acrylamide in unsaturation-containing polyols. These dispersions are employed in preparing polyurethane products.

Abstract: Urea derivatives of the formula ##STR1## where R, X, Z, Het and n have the meanings given in the description, are used for controlling undesirable plant growth.

Abstract: Benzoylthio compounds of the formula I ##STR1## where R.sup.1 and R.sup.3 are identical or different and are each hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.2 and R.sup.4 are identical or different and are each hydrogen or C.sub.1 -C.sub.6 -alkyl which is unsubstituted or substituted by hydroxyl, mercapto, C.sub.1 -C.sub.4 -alkylthio, a carboxylic ester group, carboxamido or acylamino or are each an aryl, hetaryl, arylalkylene or hetarylalkylene radical which is unsubstituted or substituted in the aryl moiety by hydroxyl, C.sub.1 -C.sub.4 -alkoxy, arylalkoxy or halogen, R.sup.1 and R.sup.2 and/or R.sup.3 and R.sup.4 together may furthermore be a radical --(CH.sub.2).sub.p -- (p=2, 3, 4), --CH.sub.2 --S--CH.sub.2 -- or --CH.sub.2 --C.sub.6 H.sub.4 --CH.sub.

Abstract: 7-phenyl-7-phenoxymethyl-hexahydro-1,4-oxazepines of the formula I ##STR1## wherein R.sup.1 is hydrogen, chlorine or methoxy and R.sup.2 is hydrogen or methyl, and their salts with physiologically tolerated acids, and their preparation, are described. The substances are useful for treating disorders.

Abstract: Substituted N-aminomethylhaloacetanilides of the formula ##STR1## where R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.2 -alkyl, R.sup.3 is hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.4 is cyano or --CO--NH.sub.2, R.sup.5 is C.sub.1 -C.sub.6 -alkyl and X is halogen, are used for controlling undesirable plant growth.

Abstract: Dibenzofuranyloxyalkylimidazolium salts having the basic skeleton ##STR1## processes for their preparation and their use as microbicides in crop protection, in industry and in human and veterinary medicine.

Abstract: A printing plate produced by a photochemical process is treated using an apparatus in which one or more flat washout elements are arranged facing the exposed side of the plate passing through the apparatus, these washout elements moving to and fro at right angles to the direction of transport of the plate and being covered with a long-fibered fabric on the side facing the plate.

Abstract: A process for the preparation of acicular ferrimagnetic iron oxides by reducing gamma-iron(III) oxide hydroxide to magnetite, at from 280.degree. to 620.degree. C., by means of an organic compound which is decomposable at this temperature in the presence of iron oxide, and, optionally, a stream of reducing gas, and, if desired, then oxidizing the magnetite with oxygen-containing gases, at from 150.degree. to 450.degree. C., to acicular ferrimagnetic iron oxide of the formula FeO.sub.x, where x is from above 1.33 to 1.50, wherein the organic compound used for the reduction is a non-polar glycerol ester of a fatty acid which is introduced into the aqueous reaction suspension during the preparation of the gamma-iron(III) oxide hydroxide.

Abstract: A procedure and apparatus for charging and emptying the drying trays in a drying box containing pumpable, solvent-moist starting materials and end products which can be conveyed pneumatically, in which procedure, for filling, the drying trays are closed by means of cover plates and the solvent-moist starting materials are pumped into the filling spaces which are thus formed, these spaces being opened on commencing the drying process, and being closed again following completion of this process, after which the end products are conveyed away from the filling spaces by pneumatic means.This procedure enables drying boxes to be employed for drying even pumpable, solvent-moist products, the recommendations relating, respectively, to explosion protection and to maximum permissible concentrations of toxic materials at workplaces, being complied with, while the operations of charging and emptying the drying boxes are, at the same time, carried out by mechanical means, and hence at lower cost.

Abstract: Dichloroquinoline derivatives of the formula ##STR1## are prepared as described, and are used as herbicides.

Abstract: A process for the preparation of an aliphatic, cyclo-aliphatic, and/or aliphatic-cycloaliphatic di- and/or polyurethane comprising the steps ofA. reacting a primary aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic di- and/or polyamine with a carbamate in the presence of alcohol at temperatures of 160.degree. C. to 300.degree. C., andB. separating the ammonia and other by-products from the aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic di- and/or polyurethane.One or more catalysts may be added to the reactants to increase the reaction rate. The aliphatic, cycloaliphatic, and/or aliphatic-cycloaliphatic di- and/or polyurethanes produced are valuable end and intermediate products. They can be transferred into the corresponding isocyanates which can then be used for the preparation of polyurethanes.

Abstract: 1,2,4-Triazole derivatives of the formula ##STR1## where R.sup.1 is alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, or unsubstituted or substituted aryl, heteroaryl or arylalkyl,R.sup.2 is hydrogen or, independently of R.sup.1, has one of the meanings given for R.sup.1,R.sup.3 and R.sup.4 independently of one another are each hydrogen, halogen, nitro or lower alkyl andZ is hydroxyl or a --O.sup..crclbar. M.sup..sym. radical, where M.sup..sym. is one equivalent of a metal cation or is an unsubstituted or substituted ammonium ion,their preparation, and fungicides containing these compounds.

Abstract: Herbicides containing a pyrazole derivative of the formula ##STR1## where R.sup.1 denotes hydrogen, formyl, acetyl, propionyl, chloroacetyl, dichloroacetyl, methoxyacetyl, methoxycarbonyl, or phenoxycarbonyl which is unsubstituted or mono- or polysubstituted by halogen, R.sup.2 denotes phenyl which is unsubstituted or mono- or polysubstituted by fluorine, chlorine, bromine, methyl, methoxy, cyano, nitro, trifluoromethyl, trifluoromethoxy or methoxycarbonyl, R.sup.2 further denotes a 5- or 6-membered, heterocyclic aromatic ring which is unsubstituted or substituted by methyl or chlorine and which contains 1 or 2 hetero-atoms X, X being independently oxygen, sulfur or nitrogen, or R.sup.2 denotes .alpha.-naphthyl or .beta.-naphthyl, and R.sup.3 denotes methyl, ethyl or isopropyl, or a salt of such a pyrazole derivative, a process for combating unwanted plant growth with the active ingredients and methods of manufacturing the herbicides.

Abstract: Thiadiazinones of the formula ##STR1## where R.sup.1 and R.sup.2 are identical or different and are each hydrogen, alkyl, cycloalkyl, phenyl or substituted aryl and R.sup.3 is phenyl or haloalkyl-substituted, alkyl-substituted, alkoxy-substituted or haloalkoxy-substituted or alkyl- or halo-substituted phenyl, are used in fungicides.

Abstract: The invention relates to aqueous dispersions based on a polyurethane synthetic resin which has been obtained by reacting a hydroxyl-containing unsaturated polyester with a diisocyanate and reacting the product with a dihydroxycarboxylic acid, dihydroxysulfonic acid, diaminocarboxylic acid or diaminosulfonic acid, neutralizing the intermediate product with a tertiary amine and transferring it into an aqueous phase, and then reacting the terminal isocyanate groups with a primary and/or secondary diamine, as a chain-lengthening agent. The dispersions contain hydrolyzed shellac as second binder component. They produce coatings having excellent solvent resistance and excellent adhesion, even to difficult substrates.

Abstract: Compounds of the general formula I ##STR1## where R is substituted alkyl and K is the radical of a coupling component free from unsaturated aliphatic radicals, are very useful for dyeing cellulose esters and synthetic polyesters.

Abstract: In an aqueous acidic plating bath for the electrolytic deposition of zinc, which contains conventional conductive salts, brighteners and surfactants, one of the surfactants is a surfactant of the formula I ##STR1## where R.sup.1 is C.sub.4 -C.sub.20 -alkyl, R.sup.2 is identical to R.sup.1 or is hydrogen, X and Y are each a radical --SO.sub.3 H, where the hydrogen atom can be replaced by an alkali metal or alkaline earth metal atom or by one equivalent of zinc and n is an integer from 5 to 50.