Abstract: A process has been developed for the mononitration of anthraquinone to 1-nitroanthraquinone with nitric acid/sulphuric acid mixtures wherein anthraquinone is nitrated in a nitric acid/sulphuric acid mixture, in which the weight ratio of nitric acid to sulphuric acid is about 1:1 to about 2:1, in which the weight ratio of sulphuric acid to anthraquinone is about 0.5:1 to about 1:1 and in which the weight ratio of sulphuric acid to water is about 2.5:1 to about 5.5:1, the weight ratios relating to the sum of the materials employed, at temperatures in the range from about 45.degree. to 70.degree. C. until the anthraquinone content is less than 3% by weight, relative to the sum of the anthraquinone compounds.

Abstract: In spite of their pigment character, dyestuffs of the formula ##STR1## are outstandingly suitable for dyeing synthetic fibres, in particular polyester fibres, by customary methods, strong yellow dyeings with good fastness to light and sublimation being obtained. In the abovementioned formula:R.sub.1 and R.sub.3 denote hydrogen, alkyl, aralkyl, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl or aryl,R.sub.2 and R.sub.4 denote alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, --CN or --CONX.sub.1 X.sub.2,X.sub.1 denotes hydrogen, alkyl, aralkyl, aryl or cycloalkyl andX.sub.2 denotes hydrogen or alkyl.

Abstract: Copper phthalocyanine is obtained in high yields when phthalic acid or derivatives thereof, urea or urea derivatives, copper salts and ammonium molybdate or heated to 200.degree.-300.degree. C. without stirring, so slowly that the components are mixed sufficiently by heat convection during the liquid phase which occurs transitionally.

Abstract: A process has been invented for the isolation of 1,6- and 1,7-dinitroanthraquinone by treating mixtures containing these isomers with nitrobenzene.

Abstract: Reactive dyestuffs are disclosed having the formula ##STR1## in which D is the radical of an organic nonanthraquinoid dyestuff; R is hydrogen or a lower alkyl; R.sub.1 is amino or substrated amino with substituents attached by a single bond, optionally etherified hydroxy, optionally etherified mercapto or an optionally substituted hydrocarbon radical; Q is an alkylene, aralkylene, arylene, --CO-- or --SO-- which is directly linked to a carbon atom of the ring of the dyestuff D; n is the number 0 or 1 and F is a fluoro substituent. The group --N(R) is directly linked to a carbon atom of the triazine ring and on the other side, the group --N(R) is linked to a carbon atom of the ring of the dyestuff D either directly (if n = 0) or (if n = 1) via one of the bridge members mentioned above. These dyestuffs are primarily suitable for dyeing of textile materials containing hydroxyl or nitrogen such as natural and regenerated cellulose, wood silk, polyamide and polyurethane.

Abstract: Dyestuffs which contain sulphonic acid groups and correspond to the formula ##SPC1##In which R.sub.1 and R.sub.2 denote lower alkyl radicals with 1 - 3 carbon atoms, which may be substituted; A means an optionally substituted aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radical; n stands for 0, 1 or 2; and R.sub.4 denotes a sulphonic acid group when n = 0 and denotes hydrogen or a sulphonic acid when n = 1 or 2.The dyestuffs are eminently suitable for the dyeing and printing of natural and synthetic polyamide fiber materials.

Abstract: Polycyclic dyestuffs of the formula ##SPC1##Wherein R.sub.1 and R.sub.2 represent alkyl, cycloalkyl, aralkyl or aryl or together form a ring which is optionally interrupted by hetero-atoms and wherein both the benzene nucleus A and the said radicals R.sub.1 and R.sub.2 can carry non-ionic radicals customary in dyestuff chemistry, and their use for the dyeing of organic materials, especially synthetic fiber materials. Dyeings obtained show good general fastness properties.

Abstract: Compounds of formula ##SPC1##Wherein R.sub.1 and R.sub.2 independently of one another denote optionally substituted alkyl radicals with 1-3 C atoms and R.sub.3 represents hydrogen or an optionally substituted alkyl radical with 1-5 C atoms, as well as compounds of the formula ##SPC2##Wherein R.sub.4 represents an alkyl group which is optionally substituted by hydroxyl or alkoxy groups, and R.sub.5 and R.sub.6 represent hydrogen or an amino group which is monosubstituted or disubstituted by a straight-chain alkyl group or a cycloalkyl group, with the proviso that R.sub.5 and R.sub.6 do not simultaneously represent hydrogen, and processes for their production.