Abstract:
A preparation method of original dye of Vat Brown R comprises the following steps: a. after acylation of 1,5-diaminoanthraquinone, 1-amino-5-benzamidoanthraquinone was prepared by acidic hydrolysis; b. 1-benzamido-4-bromoanthraquinone was obtained from 1-aminoanthraquinone by acylation and bromination; c. a condensate of Vat Brown R was obtained by condensation reaction of 1-amino-5-benzamidoanthraquinone and 1-benzamido-4-bromoanthraquinone; d. the original dye of Vat Brown R was obtained from the condensate of Vat Brown R by ring closing reaction and oxidation reaction. The method omits one oxidation step, economizes significant amount of oxidizing agent, and reduces significant amount of waste water, so it is very beneficial to environment protection; and the method also exhibited the advantages of highly increasing product yield and reducing the costs of raw materials to an extent of more than 30%.
Abstract:
THE CONTINOUS DYEING OF SYBTHETIC FIBRE MATERIALS FROM ORGANIC SOLVENTS. THE FIBRE MATERIALS ARE IMPREGNATED WITH DYE LIQUORS WHICH CONTAIN ANTHRAQUINONE DYESTUFFS OF THE FORMULA
1-(R1-NH-),4-(R-CO-NH-)ANTHRAQUINONE
IN WHICH R REPRESENTS A C1-C17-ALKYL RADICAL, AN ARALKYL OR OPTINALLY SUBSTITUTED ARYL RADICAL AND R1 STANDS FOR AN ALKYL RADICAL WHICH MAY BE SUBSTITUTED BY ALKOXY OR ALKYLAMINO GROUPS, FOR A CYCLOALKYL, ARALKYL OR FOR AN OPTIONALLY SUBSTITUTED ARYL RADICAL, AND SUBEQUENTLY SUBJUCTED TO A HEAT TREATMENT.
Abstract:
A PROCESS FOR PRODUCING MONOACYLATED DERIVATIVES OF DIAMINOANTHRAQUINONES COMPRISING REACTING THE DIAMINOANTHRAQUINONE WITH BENZOYL CHLORIDE OR A MIXTURE OF BENZOIC ACID AND AN INORGANIC ACID CHLORIDE IN THE PRESENCE OF AN N,N-DIALKYL CARBOXYLIC ACID AMIDE.
Abstract:
NEW WATER-SOLUBLE VAT DYESTUFFS CONTAINING ARYLOXY-OR ARYLMERCAPTO GROUPS AND TWO ANTHRAQUINONE RADICALS OR A VATTABLE CHROMOPHOR CONTAINING AT LEAST 4 FUSED RINGS.
Abstract:
Vat dyes are made by condensing a 41:51-dichloroo 41:51-dibromo-11:81-naphthoylene-benz- or naphthimidazole or substitution product thereof with a 1-amino-anthraquinone in the presence of an acid-binding agent and heating the chlorine- or bromine-containing intermediate thus obtained in the presence of an acid amide which may be substituted at the nitrogen atom, such as acetamide, pyrrolidone, benzamide or phosphoric acid-tris-dimethylamide, and an acid-binding agent in the presence or absence of an organic liquid such as a -chloronaphthalene at temperatures from 150 DEG to 270 DEG C. Olive-green to green vat dyes are obtained.