DE121684C - - Google Patents

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Vr 121684 CLASS 226.

Addition to patents 116546 from ig. October 1898.

Patented in the German Empire on December 16, 1898. Longest duration: October 18, 1913.

In patent specification 116546 the illustration is of sulfonic acids of anthracene dyes, which are obtained by treating condensation products from halogen-substituted dialphyldiamidoanthraquinones and primary aromatic amines with sulphurizing agents.

It has now been found that these condensation products can be replaced by those, which respectively from tetrabromanthraquinone. that from crude 1 · 5 -diamidoanthraquinone obtained tetrabromo derivative by the action of primary aromatic amines after The method of patent specification 121528 can be represented are.

The sulfonic acids obtained in this way usually dye both chrome-stained and unheated wool in blue to green-blue tones; the dyeing of unheated wool in an acid bath and subsequent treatment with metal stains gives similar results.

To represent these dye sulfonic acids are available according to the patent 121528 crude or purified condensation products from tetrabromodiamidoanthraquinones and primary aromatic amines with the usual sulphurizing agents, such as concentrated Sulfuric acid, fuming sulfuric acid, sulfuric acid chlorohydrin, mixture of Sulfuric acid and boric acid or metaphosphoric acid, with or without the addition of kieselguhr and so on for a longer time at normal temperature or for a shorter time at a higher temperature.

The following examples serve to explain the procedure:

Example I.

io kg of the example of the patent 12i 528 obtained condensation products Aniline and tetrabromo-1 · 5 - diamidoanthraquinone are dissolved in 200 kg sulfuric acid of 66 ° B. entered and stirred at ordinary temperature until a sample is in hot Water has become soluble. Then the melt is poured into water, whereby the sulfonic acid, which is rather sparingly soluble in dilute acid, is largely separated out; it is completely precipitated by the addition of table salt or potassium chloride, filtered off and dried (see table for properties).

Instead of the previously discussed, from the tetrabromo derivative of the pure 1-5 - diamidoanthraquinone and aniline-obtained condensation products can also be used which is made from the crude tetrabromo derivative of the crude 1 · 5-diamidoanthraquinone (which as is known, apart from the 1 × 5 compound, it contains isomers of the same) and aniline is formed.

The same procedure is followed if, instead of the aniline, the o- or p-toluidine condene

sationsproduct of the tetrabromodiamidoanthraquinone is used.

Example II.

ίο kg of Condensationsproductes obtained according to the patent specification 121528 from Tetrabromdiainidoanthrachinon and beta-naphthylamine are added to 200 kg of sulfuric acid of 66 ⁰ B. and heated up to the water to 60 to 70 ° C. The easily soluble sulfonic acid is separated out by pouring it into water and salting out with common salt or potassium chloride (see table for properties).

The same procedure is followed if, instead of the / 3-naphthylamine, the α-naphthylamine condensation product is used is applied.

The properties of the dyes obtained in the above examples are as follows Table.

Sulfonic acid
of
Condensations
productes from
Tetrabromodiamido
anthraquinone and Appearance of the
dry
Dye Water solubility Caustic soda sulfuric acid
66 ° B. Coloring on
unheated
Wool in
acid bath aniline gray powder easily soluble with
pure blue color no colors
modification carmoisine red pure blue o-toluidine the same easily soluble with
cloudy blue color the same cherry red somewhat greenish
blue p-toluidine bluish gray
powder easily soluble
green Blue the same violet green Blue α-naphthylamine gray-black
powder easily soluble with
blue color becomes something
greener red-brown blue ß-naphthylamine blackish
powder easily soluble with
bluish green
colour no colors
modification cloudy purple bluish green.

Claims (1)

Patent claim: Further development of the method of patent 116546, consisting in that in place of the condensation products used there from halogen-substituted dialphyldiamidoanthraquinones and aromatic amines here those from tetrabromo-1 · 5-diamidoanthraquinone or the crude tetrabromo derivative of the crude i-5-diamidoanthraquinone and primary aromatic Amines are treated with sulphurizing agents.