DE71306C - Process for the preparation of stain-coloring dyes from anthradichinones and phenols - Google Patents

Description

IMPERIAL

PATENT OFFICE W.

In patent specification No. 70234 there is a method for the preparation of new dyes described by condensation of anthradichinones with phenols.

Except for the anthradichinones from penta- and hexaoxyanthraquinones used there can also other anthradichinones, such. B. those from di- and trioxyalizarin blue representable quinones can be used.

One of these quinones, namely the one which is derived from dioxyalizarin blue (quinoline derivative des Alizarinbordeaux) of patent specification No. 58480 is already in the patent specification No. 68113. Another quinone is obtained by using the alizarin indig blue Patent Specification No. 47252 e.g. B. oxidized in the following way:

10 kg of dry alizarin indig blue are dissolved in 200 kg of sulfuric acid of 66 ° B. and at a temperature not exceeding 25 °, 5 kg of finely powdered manganese dioxide were added. The color of the solution changes from blue to green, and if there is no other If the change in color is more noticeable, the reaction mixture is poured onto ice and if the bulk of the acid is blunted by the addition of alkali, it is true that a substantial amount Temperature increase does not occur. The quinone separates and can through Filter off and wash with cold water.

Outwardly it shows great resemblance to that described in patent specification No. 68113 Dioxyalizarin blue derivative. It dissolves easily in dilute sulfuric acid with red color; the addition of sulphurous acid reduces the alizarin indig blue.

The condensation of these quinones from oxyalizarin blue derivatives with phenols is accurate in the manner described in the parent patent. :

Here, too, 1 Molecül of the anthradichinone occurs with ι Molecül phenol, as from the obtained yields is evident. It is best to combine the representation of the anthradichinone and the condensation of the latter with the phenol concerned respectively. substituted Phenol to a single operation.

The process itself is explained using the following example.

Dioxyalizarin garlicinone dye

and salicylic acid.

10 kg of dry dioxyalizarin blue are dissolved in 200 kg of sulfuric acid of 66 ° B. and according to that in patent specification No. 68113 described method with 5 kg of manganese dioxide oxidized to the anthradichinone. One wears on this 10 kg salicylic acid, takes about 18 hours at a temperature between 20 and 30 °

stand for a long time with frequent stirring, then pour into water, filter off and wash neutral.

The dye thus obtained stains chrome stains in blue-gray tones.

If one uses instead of the dioxyalizarin

blue 10.5 kg alizarin indig blue, so got result in a dye with the same coloring properties.

The following table summarizes the properties of some of these dyes:

Dye off Salicylic acid concen-
trirter
sulfur
acid Solution in
soda
solution Baking soda
lye
or
ammonia coloring
with
Clay
pickle on wool
with
chrome
pickle to the
Quinone des
Dioxy
alizarin-
blue -j- p-
Oxybenzoic acid blue blue green blue green blue-gray gray-blue 0-
Cresotic acid blue greenish
blue greenish
blue blue-gray gray-blue ■. · the quinone of the alizarin indig-
blue + salicylic acid blue blue green blue green blue-gray gray-blue violet bluish
green blue green green grey gray-green

Claims (1)

Patent claim: The execution of the claim ι. of the main patent protected process under Application of the quinones from the dioxyalizarin blue of patent no. 58480 or from the Alizarin indig blue of patent no.47252.