SU13065A1 - The method of obtaining vat dyes - Google Patents

Description

In the proposed method for the production of vat dyes, the para-quinones of the benzene series, or their halo-emitters, are condensed with products of the action of chloride on aromatic amines, prepared according to the methods described in German patents No. 360690 and No. 367344, taken in the amount of one or two molecules ; identical nli different, on one molecule of x non. It is also possible to use for condensation with quinones not the very products of the action of cep {, i chloride on aromatic amines, but compounds produced by the action of water on these products. A modification of this method is the method according to which alkali-derived products of the reaction of sulfur chloride with aromatic α-51 amines ort ortho-amido-thio-phenols are used for condensation with phenols. Instead of the benzene para-quinones, it is also possible to use the naphthalene para-quinones for their halide derivatives for condensation. It is also possible to obtain vat dyes and such

by reacting sulfur compounds with aromatic amines by themselves, or by acting on these late winter waters or alkalis, instead of copdensadium, are subjected to joint oxidation with benzene or naphthalene p-hydroquinones, or their halo derivatives .

Example 1. 25 kg of chloroanil and 12.5 kg of o-amino-thio-phenol or an equivalent amount of hydrochloride or zinc salt of o-aminothiophenol are mixed with twenty-fold by weight amount of water, alcohol or glacial acetic acid and the mass is heated in a boiler for several hours with constant stirring. At the end of the reaction, the condensation product is released almost completely as a dark powder. It dissolves in concentrated sulfuric acid with a reddish-violet color, dyeing (especially wool) in a hydrosulfite cube in strong colors, from reddish-brown to violet-brown. Similar products are also obtained if, in this example, o-amino-nanophenol is replaced with an equivalent amount of aniline-thio-sulfonic acid or o-o-amino-diphenyl disulfide or, if subjected to oxidation, preferably in an alkaline solution, the molecular mixture, on the one hand hydroquinone or chlorhydroquinone n o-aniline-thio-sulfonic acid, b-0-diamino-diphenyl-disulfide, on the other.

and pm. m p 2. 25 kg, chloranil and 24 kg of the product of the reaction of serum chloride and p-phenetidine (cf. germ. Patent 36D690) are mixed with 250 kg of alcohol or glacial acetic acid. The whole mass is heated for several hours to 80-100 ° with constant stirring. Then a substance that binds the acid liberated by the reaction, eg soda or sodium acetate, is added. To completely isolate the product of condensation, either the solvent is sucked off, or the mass is diluted with water, whereby the intermediate is released, which is filtered off and can be used immediately. In the dry form, it forms a dark blue powder, which dissolves in pure sulfuric acid with a pure blue color. Instead of the products of the interaction of sulfur chloride and p-phenetidine, the appropriate amounts of its substitution products can be used in this reaction, which can be obtained by treatment with water or alkali, preferably in the presence of a proper reducing agent (see germ. Pat. L 364822).

Er and mep 3. 30 kg of chloranil or 20 kg of 2.5-or 2.6-dichloro-benzoquinone are condensed according to the method described in the previous example, in an aqueous or alcoholic solution with 18 kg of 2-amino-1-thionaphthol (preferably in the form of zinc salt). The dry condensation product is a dark powder that dissolves in conc. sulfuric acid with a pure blue color. It is possible to use 2-amino-1-thionaphthol compounds, equivalent to it, for example, the product of the interactions of sulfur chloride and: P-naphthylamine or a compound obtained from it under the action of water according to germs. pat L 364822.

The subject of the patent.

1. A method for the production of vat dyes, characterized in that the para-quinones of the benzene series or their halo-propellants condense with the products of the action of sulfur chloride on aromatic amines, obtained according to the methods described: in germs, pat. L ° 360690 L 367344, in the amount of one or two molecules, the same or different, per one quinone molecule.

2. The change of the method mentioned in paragraph 1, characterized in that the products of the reaction of sulfur chloride with aromatic amines, indicated in paragraph 1.,. used for condensation with hinoaml compounds resulting from the action of water on these products.

3. Change the marked in and. 1 method, characterized in that, together with the products of the reaction of sulfur chloride with aromatic ammonia, products of the action on these alkali compounds having the character of ortho-amido-thiephenols are used for condensation with phenols.

4. Alteration of the method indicated in clause 12 n 3, characterized in that, instead of paraquinones of the benzene series, parachiones of the naphthalene series or their halo derivatives are used for condensation.

5. Change of the meaning indicated in p. 1-4 siozoba, characterized in that the products of the reaction of sulfur chloride with aromatic amines or compounds, which are obtained by treating these products with water or alkali, instead of condensation with quinones, are subjected to a combined oxidation with p-d hydroquinones of the benzene or naphthalene variety, or their halo derivatives.