DE188193C - - Google Patents

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PATENT OFFICE.

PATENT LETTERING

- .M188193 CLASS 22 b. GROUP

Addendum to patent 172609 of March 26, 1904.

Patented in the German Empire on April 15, 1905. Longest duration: March 25, 1919.

In the further course of the investigation into the action of alkalis on the benzanthrone derivatives It has been shown that, like the condensation products used in the main patent 172609 from ß-aminoanthraquinone and glycerol also the corresponding condensation products from the homologues of those in patents 171939, 176018, 176019 and 181176 starting materials used, or from the halogen substitution products of the anthraquinone derivatives used in patent 176018 and their homologues, or from α-aminoanthraquinone or α-aminoanthraquinone derivatives are capable of supplying vat dyes when treated with alkalis. More information about these products can be found in French patent 349531 of December 21, 1904, also in the 2nd addition No. 4494 of February 22, 1905, in the 3rd Amendment No. 4685 of March 20, 1905 and in the 5th Amendment No. 5045 of June 22, 1905 on said French patent.

An exception to this behavior is shown by those according to patent 187495, 3rd amendment to the patent Oxybenzanthrones and nitrobenzanthrones obtained from oxyanthraquinone and glycerine in 171939 of the 8th amendment No. 6435 of June 25, 1906 to French patent 349531 and the aminobenzanthrones by failing to make these compounds after the process of patent 172609 by treatment with caustic alkalis in vat dyes to convert.

The process is illustrated by the following examples.

Example I.

20 parts by weight potash are mixed with 8 parts by weight ioprozentigem alcoholic potash and heated to 175 ⁰ C., and to this mixture three parts by weight Methyibenzanthron represented by condensation of z. B. ß-methylanthranol with glycerol are entered. The melt is now held at 185 to 190 ^° C. until there is no longer any increase in dye formation. By dissolving the melt in water and boiling the solution in the air or by air oxidation, the dye is deposited in dark flakes. In concentrated sulfuric acid it dissolves green-blue, in nitrobenzene it dissolves violet. He dyes the vegetable fibers from the vat in lilac tones. The color of the hydrosulfite vat is purple with strong fluorescence. . .

Example II.

50 parts of potassium hydrate and 40 parts of absolute alcohol are heated and slowly at 160 ° with stirring with 10 parts of ct-benzanthronequinoline (prepared from α-aminoanthraquinone by condensation with glycerine, boiling

of the crude product with dilute acids and precipitates with alkalis). Now is raised with constant stirring, the temperature slowly to 220 to 230 ⁰ C. and retains them until on a sample no unchanged a-Benzanthronchinolin is no longer detectable. The melt, cooled to about 80 ° C., is poured into water, boiled and filtered. For cleaning, the black granular residue is first boiled with dilute sodium hypochlorite solution and then with dilute acid, filtered and washed. For complete purification, the dye can be vat with sodium hydroxide solution and hydrosulfite, filtered hot and precipitated from the hot filtrate by introducing air.

The dye thus obtained is a black-violet dough when dry is a purple-black powder that is insoluble in hot water and caustic soda. He dissolves dirty olive green in concentrated sulfuric acid, in 23 percent oleum green, in nitrobenzene and quinoline green.

With caustic soda and hydrosulfite, he gives a blue-violet vat in the warmth in which the vegetable fiber is dyed in blue tones of excellent fastness.

Example III.

10 parts of chlorobenzanthrone, shown from

(3-chloroanthraquinone by condensation with Glycerine or one of its anhydrides or

the ether or ester of the latter or of glycerol, are entered at 150 ⁰ C. into a melt of 40 parts of potassium hydroxide and 40 parts of absolute alcohol and ^J / ₂ Hour long fused at i8o ° C. After cooling, it is boiled with water, the precipitated dye is filtered and washed.

The dye thus represented is a blue-black powder that, when diluted in water, is used Acids and is insoluble in alkalis. It dissolves in concentrated sulfuric acid dirty purple-brown, dirty brown in 23 percent oleum, very heavy in glacial acetic acid Bordeaux red, in nitrobenzene and quinoline, light with a beautiful red-violet color and intense dark red fluorescence. With caustic soda and hydrosulfite, the dye gives a blue-red vat that contains the vegetable fibers stains blue-violet color; the color will turn blue after washing and drying.

Claims (1)

Patent-An saying: Innovation in the process of patent 172609, consisting in the fact that instead of the condensation products of ß-aminoanthraquinones and glycerol used there, the corresponding condensation products from the homologues of the starting materials used in patents 171939, 176018, 176019 and 181176, from the halogen substitution products of in the patent 176018 used anthraquinone derivatives and their homologues or treated from α- aminoanthraquinone and α-aminoanthraquinone derivatives with caustic alkalis.