Abstract: Dyestuff mixtures of(a) an anthraquinone dyestuff of the formula ##STR1## (b) a preferably blue azo dyestuff of the formula ##STR2## wherein R.sub.1 =H or halogen,R.sub.2 =alkyl,R.sub.3 =H or alkoxy, andR.sub.4 and R.sub.5 =alkyl or alkenyl,and(c), optionally, shading dyestuffs are particularly inexpensive and are distinguished by good dyebath stability and application properties.

Abstract: 95-99% pure 4,5-dinitro-1,8-dihydroxyanthraquinone which is essentially free from by-products is obtained by "direct nitration" of 1,8-dihydroxyanthraquinones or 1,8-dimethoxyanthraquinones if the concentrations of acid are chosen such that, when the nitration reaction and, if appropriate, the saponification reaction have ended, an 80-100% strength sulphuric acid is present, or such a sulphuric acid concentration is established by adding water, and the 4,5-dinitro-1,8-dihydroxyanthraquinone which crystallizes out is separated off.

Abstract: Cationic anthraquinone dyestuffs of the formula ##STR1## wherein R.sub.1 denotes hydrogen, alkyl or cycloalkyl,R.sub.2 denotes hydrogen, alkyl or bromine,R.sub.3 denotes alkylene,R.sub.4 and R.sub.5 denote alkyl, aryl or aralkyl,R.sub.6 denotes alkyl or aralkyl andX.sup..crclbar. denotes an anion,and the substituents mentioned can in turn be substituted by non-ionic radicals, are prepared by reacting anthraquinones of the formula ##STR2## with amines of the formula ##STR3## in the presence of a proton acceptor and of copper salts as a catalyst, in a solvent mixture consisting of 50 to 90% of one or more aprotic, non-polar or slightly polar solvents and 10 to 50% of one or more protic or aprotic, polar solvents, trapping the acid formed during the reaction by bases which do not precipitate the catalyst and then quaternizing the product, without intermediate isolation.

Abstract: Dimethoxyanthraquinones can be prepared in high purity and in good yield in an economic manner which does not pollute the environment when 1 part by weight of dinitroanthraquinone is reacted with 2-8 parts by weight of methanol and 0.5-1.5 parts by weight of potassium hydroxide until all of the nitro groups have been replaced; the reaction is preferably carried out in the presence of 0.05-0.5 part by weight of amidosulphonic acid.

Abstract: For dyeing and printing cellulose fibres which have been swollen with water-miscible swelling agents or mixed fibres containing these fibres, the fibres are treated with dyestuffs which are free from sulphonic acid groups and carboxylic acid groups, of the general formula ##STR1## wherein R represents optionally substituted C.sub.1 -C.sub.6 -alkyl, cyclohexyl, C.sub.1 -C.sub.4 -alkoxy, phenyl, benzyl, phenylethyl, phenylpropyl or phenoxy, or chlorine or bromine,n represents 0, 1 or 2,one X represents OH and the other X represents NO.sub.2, NH.sub.2 or R'-CONH and R' represents optionally substituted C.sub.1 -C.sub.4 -alkyl or phenyl,and the dyestuffs are fixed by heat treatment.

Abstract: In order to dye and print cellulose fibres swollen with water-miscible swelling agents or mixed fibres containing these fibres, the fibres are treated with dyestuffs which are free from sulphonic acid groups and carboxylic acid groups, of the general formula ##STR1## wherein R denotes hydrogen or optionally substituted alkyl, aryl or acyl,Hal denotes chlorine or bromine,n denotes a number from 0 to 2 and the ring B can optionally be further substituted or fused, with the proviso that if R denotes hydrogen or methyl, n must be >0 and/or B must be further substituted,and the dyestuffs are fixed by heat treatment.

Abstract: Fabrics of synthetic fibres, preferably polyester fibres, can be printed in clear blue shades in accordance with the transfer printing principle if dyestuffs of the formula ##STR1## wherein R represents an alkyl radical with 2-6 C-atoms, are used.

Abstract: The invention relates to a process for the preparation of water-insoluble chlorine-containing diaminodihydroxyanthraquinone dyestuffs. The process consists in that 2,8-dichloro-1,5-dinitroanthraquinone and/or 2,5-dichloro-1,8-dinitroanthraquinone is warmed with sulphur in concentrated sulphuric acid having a maximum SO.sub.3 content of 20% - possibly in the presence of boric acid - the resulting compounds are, if appropriate, post-halogenated and/or alkylated, preferably in the same reaction batch.The main advantage of this process is that it starts from 1,6- and/or 1,7-dichloroanthraquinone, for which there was hitherto no industrial use, but which unavoidably also arise during the synthesis 1,5- and 1,8-dichloroanthraquinones.

Abstract: The invention relates to mixtures of water-insoluble anthraquinone dyestuffs of the formula ##STR1## in which A and B are amino or hydroxylR is alkyleneX is a direct bond, oxygen, sulphur or iminoAr is arylD.sub.1 and D.sub.2 are hydrogen or halogen,Hal represents chlorine or preferably bromine andn represents on average a number from 0.1 to 2.5.The preferred variant for the preparation of the dyestuffs (wherein Hal represents bromine) is characterized in that anthraquinone compounds of the formula ##STR2## are brominated on the aryl radical Ar. The dyestuffs are outstanding suitable for the dyeing of polyester fibers.

Abstract: The invention relates to the preparation of anthraquinone disperse dyestuffs from aqueous solutions containing anthraquinone-sulphonic acid mixtures, especially from appropriate waste waters by treating such solutions with chloric acid/hydrochloric acid or their salts or activated halogene, isolating the halogenoanthraquinones thereby obtained, subjecting them to dinitration and warming the dinitrohalogenoanthraquinones thus obtained with elementary sulphur in sulphuric acid optionally in the presence of boric acid. The reaction products are .beta.-halogenated diaminodihydroxyanthraquinones which are suitable for the dyeing of polyesters and polyamides in blue shades with good fastness properties.

Abstract: Anthraquinone dyestuffs of the formula ##SPC1##In whichX.sub.1 and X.sub.2 denote an amino or hydroxyl group,Y denotes a bridge member,A denotes a heterocyclic radical ##SPC2##Which can optionally be substituted further by non-ionic substituents,Z denotes oxygen, sulphur or a sulphonyl, imino or alkylimino group,Q denotes hydrogen, chlorine or bromine,R.sub.1 and R.sub.2 denote hydrogen, alkyl, aralkyl, cycloalkyl, aryl or heterylAnd whereinR.sub.1 and R.sub.2 can also form, conjointly with the nitrogen atom, the remaining members of a heterocyclic ring as well as a process for their preparation and their use for dyeing synthetic fiber materials.

Abstract: Anthraquinone dyestuffs of the formula ##STR1## in which X.sub.1 denotes hydroxyl or amino, X.sub.2 denotes hydroxyl, amino, alkylamino, cycloalkylamino, arylamino, acylamino, alkylmercapto or arylmercapto, R denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl, Z denotes alkylene, Ac denotes acyl and Y denotes hydrogen or halogen, and in which the ring A can optionally by substituted by halogen, as well as their preparation and use for the dyeing of synthetic fibre materials. The dyed materials show good fastness to light and sublimation.