Abstract: This invention relates to diaminoarylsulfones of the formula ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are independently C.sub.1 -C.sub.12 alkyl, that are useful as chain extenders in the preparation of polyurethane elastomers.

Abstract: Aromatic hydrocarbons are chlorinated in the nucleus in the presence of Friedel-Crafts catalysts and in the presence of co-catalysts in the liquid phase by using thiazepines as co-catalysts.

Abstract: 1,2-Dichlorobenzene can be prepared by reacting 1,2,4-trichlorobenzene in the gas phase with hydrogen. The reaction is carried out at a temperature from the boiling point of the starting material up to about 400.degree. C. and over a platinum-spinel catalyst.

Abstract: N,N-Diaryl-ureas of the formulaR.sup.1 --NR.sup.2 --CO--NH--R.sup.3whereinR.sup.1 and R.sup.2 denote aryl andR.sup.3 denotes alkyl, aralkyl or aryl, can be prepared by a process in which a diarylamine of the formulaR.sup.1 --NH--R.sup.2is reacted with an isocyanate of the formulaR.sup.3 --NCOwherein R.sup.1, R.sup.2 and R.sup.34 have the above meaning, in the presence of acid compounds and in the presence or absence of an inert solvent and/or diluent at elevated temperature.

Abstract: 4-Nitrophenetol is prepared by reaction of 4-chloronitrobenzene with ethanol and alkali metal hydroxides in the presence of phase-transfer catalysts by carrying out the reaction at temperatures from 60.degree. to 95.degree. C. and under pressure in the presence of oxygen-containing gases diluted with inert gases, there being at the start of the reaction 0.2 to 1.0 mol of alkali metal hydroxide metered each hour into the reaction mixture for each 1 mol of 4-chloronitrobenzene.

Abstract: Liquid compositions, having dielectric properties, which contain mixtures of ditolylether isomers and alkylbenzenes.

Abstract: In the preparation of 3,5-dichloro-.alpha.-methylstyrene by isopropylation of an m/p-dichlorobenzene mixture, isomerization of the resulting alkylation mixture, subsequent side chain bromination of the alkylation mixture and dehydrobromination of the resulting bromination mixture, the improvement which comprises reacting an excess of an m/p-dichlorobenzene mixture which contains at least 50% by weight of m-dichlorobenzene with isopropyl halide, isomerizing the resulting alkylation mixture under pressure in the presence of aluminum chloride until thermodynamic equilibrium has been attained, separating off the isomerized alkylation mixture from the unreacted m/p-dichlorobenzene mixture, and recycling the unreacted mixture for further reaction.

Abstract: The present invention relates to the preparation of thiocyanatomethylthiobenzothiazoles by the reaction of halomethylthiobenzothiazoles with thiocyanates at elevated temperature in aqueous solution in the presence of a phase transfer catalyst.

Abstract: 5-Fluorotoluene-2,4-disulphochloride is prepared by chlorosulphonation of 3-fluorotoluene by first reacting the 3-fluorotoluene with chlorosulfuric acid and then with an inorganic acid chloride at temperatures up to 130.degree. C. until the evolution of gas is complete, and then heating the reaction mixture at temperatures of up to 200.degree. C. and, after the completion of the gas evolution, reacting the product at a lower temperature with further inorganic acid chloride, or reacting the 3-fluorotoluene with powerful sulphonating agents at an elevated temperature, if appropriate in the presence of inert solvents and/or diluents, to give the corresponding disulphonic acid and then treating the disulphonic acid with inorganic acid chlorides.

Abstract: Thermotropic aromatic polyesters which contain 3,3'-diphenyl-4,4'-dihydroxydiphenyl radicals as diphenol radicals can be processed by thermoplastic methods without decomposition, in spite of the high heat distortion resistance.

Abstract: 2,4-Dichloro-3-alkyl-6-nitrophenols are prepared by chlorinating, with chlorine in the presence of a catalyst, 1-alkyl-4-nitrobenzenes having a C.sub.2 -C.sub.8 -alkyl radical until the content of trichloroalkylnitrobenzenes is at least 60% by weight in the chlorination mixture, removing the catalyst from the chlorination mixture, then hydrolyzing the chlorination mixture, removing the precipitated reaction product, and treating it with an aqueous inorganic acid. The 2,4-dichloro-3-alkyl-6-nitrophenols are new.

Abstract: Substituted styrenes are prepared by treatment on N-acyl-B-phenethylamines with bases and removal by distillation of the styrene which is formed during the reaction.

Abstract: 2-Amino-alkylpyridines are prepared by catalysed isomerisation of 1,3-diaminobenzenes at elevated temperature.

Abstract: An improved process for the preparation of 2,6-xylidine by amination of 2,6-dimethylphenol in the vapor phase with ammonia in the presence of an aluminum oxide catalyst is disclosed. According to the invention, particular amination conditions are chosen to effect high yields of the desired product. These conditions include a temperature of 360.degree. to 460.degree. C. and a minimum molar ratio of ammonia to 2,6-dimethylphenol which corresponds to the general formula ##EQU1## wherein X represents the minimum molar ratio of ammonia to 2,6-dimethylphenol,Y represents the minimum pressure andM and B are constants, with M=-39.2826 andB=262.809.

Abstract: 3,5-Dichloro-.alpha.-methylstyrene is prepared from .alpha.-bromo-3,5-dichlorocumene by reaction with alkali metal hydroxide solutions in the presence of phase-transfer catalysts.

Abstract: Phenoxymethane derivatives of the formula ##STR1## in which R.sup.1 represents hydrogen, alkyl, alkoxy, halogenoalkyl, halogenoalkoxy, halogen, alkoxycarbonyl, cycloalkoxycarbonyl or nitro,R.sup.2 represents hydrogen, alkyl or halogen,R.sup.3 represents hydrogen, alkyl, alkenyl, alkinyl, phenyl which is optionally substituted by alkyl and/or halogen, phenylalkyl which is optionally substituted by alkyl and/or halogen, alkoxy, phenoxy, halogenoalkyl, halogenoalkoxy, alkylthio, halogenoalkylthio, alkylsulphonyl, phenylthio, phenylsulphonyl, nitro or halogen,R.sup.

Abstract: 3,6-Disubstituted 2-thioxo-1,3,5-thiadiazin-4-ones of the formula ##STR1## in which R.sup.1 represents hydrogen; alkyl which is optionally monosubstituted or polysubstituted by identical or different substituents; alkenyl which is optionally monosubstituted or polysubstituted by identical or different substituents; alkinyl which is optionally monosubstituted or polysubstituted; cycloalkenyl or cycloalkyl which is optionally monosubstituted or polysubstituted by identical or different substituents; aryl or aralkyl which is optionally monosubstituted or polysubstituted by identical or different substituents; or a heterocyclic structure which is monosubstituted or polysubstituted by identical or different substituents;R.sup.

Abstract: Novel 2-thiocyanato-benzamides of the formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are identical or different and represent an aliphatic radical, an arylalkyl radical which is optionally monosubstituted or polysubstituted by identical or different substituents, or a cycloalkyl-alkyl radical which is optionally monosubstituted or polysubstituted by identical or different substituents, orR.sup.1 and R.sup.2 independently of one another represent hydrogen,which possess fungicidal activity.

Abstract: The light fastness of dyed polyamide fibre materials, in particular of the type used for manufacturing car seat covers, can be substantially improved by treating these materials, before, during or after the dyeing, with copper compounds of the compounds of the formula ##STR1## wherein R=H, OH, alkyl or cycloalkyl. The compounds (I) are distinguished by low self-colour and good stability to acid conditions.

Abstract: The invention relates to a process for the preparation of alkyl-substituted anilines by the reaction of alkyl-substituted phenols in the vapor phase with ammonia in the presence of an aluminium oxide catalyst, the starting materials being passed through the reactor at a particular flow rate.Alkyl-substituted anilines are intermediate products for the preparation of herbicides.