DE552025C - Process for the production of metal-containing azo dyes - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
June 11, 1932

REICH PATENT OFFICE

PATENT LETTERING

VR 552025 CLASS 22 A GROUP

Society for the chemical industry in Basel m Basel, Switzerland

Process for the production of metal-containing azo dyes

Patented in the German Empire on May 11, 1929

The subject of patent 528 165 is a process for the production of chromium-containing Azo dyes, characterized in that the mixture of the Azo dyes and the chromium donating agent, the latter from organic Chromium salts or inorganic chromium salts and acid-binding agents can, nor salts of organic acids or

to free organic acids or both together or salts of inorganic acids with free organic acids.

It has now been found that it is possible to obtain new metal-containing azo dyes, if you get the according to patent 528 165 chromium-containing dyes, which differ from diazotized 1-amino-2-oxynaplithaIine-4-sulfonic acids derived, treated with such compounds, which other metals, such as copper, Cobalt, nickel, tungsten, uranium, aluminum, tin, titanium, molybdenum, etc.

The dyes obtainable in this way,

which contain other metals in addition to chromium are usually distinguished by the only chromium-containing dyes due to better fastness properties and larger ones Solubility off. The present process is particularly useful for producing true black coloring Products suitable, of which those are particularly valuable which differ from the nitrated diazo compound of i-amino-2-oxynaphthalene-4-sulfonic acid derive. The new dyes can be used to dye a wide variety of fibers and also paints be used. .

example 1

According to example 1 of patent 528 165 obtainable solution of the chromium compound of the azo dye from the nitrated diazo compound of 1-amino-2-oxynaph.thalene-4.-sulfonic acid and ß-naphthol is before salting out with a concentrated solution of 25 parts of copper sulfate and 30 parts of crystalline sodium acetate. offset and 2 hours stirred at 50 to 60 ° C, whereupon the dye after filtering the solution by salting out is deposited. The new dye is in water with purple black, in ι 1 percent sodium hydroxide solution with reddish brown-violet and in concentrated sulfuric acid soluble with blue color.

A similar dye can be obtained by using the solution of the chromium compound

with a concentrated solution of 10 parts of copper sulfate · and ι o parts ι o per cent Acetic acid is added and evaporated to dryness at a temperature not higher than 60 ° C.

Example 2

The chromium compound solution used in Example 1 is mixed with 20 parts of 24 percent ammonia, then with a copper oxydammonia solution containing 25 parts of crystalline copper sulfate, 200 parts of water and 60 parts of ammonia, the chromium-copper compound of the dye being changed immediately insoluble deposited. This suspension is heated ι hour on a water bath, cooled to 50 ⁰ C, then made just acid to Congo red with 1 oprozentiger sulfuric acid. Already after about ViStündigem stirring at 50 to 6o ^Q C solution occurred. Then, after filtering the solution, the dye is deposited by salting out. After drying, it is a black powder that is very easily soluble in water with a purple-black color. Its solution in concentrated sulfuric acid is blue and in 1% sodium hydroxide solution reddish brown-violet.

Instead of an ammoniacal copper sulfate solution, copper hydroxide or Such copper solutions are used, which are made from caustic alkalis, hydroxyl-containing organic Connections and copper connections arise.

Example 3

The solution of the chromium compound used in Example 1 is mixed with 30 parts of nickel sulfate and part of acetic acid in 200 parts of water, heated to 60 ° C for 3 hours, filtered and salted out. The metal-containing dye dissolves in water violet-black, in concentrated sulfuric acid with blue and in 1% sodium hydroxide solution with reddish brown-purple color.

More valuable, black coloring products are obtained if one takes place of nickel sulfate, copper, cobalt, manganese, vanadium, uranium, tungsten or other complexing agents Metals or mixtures of such metals are used or if the treatment with the mentioned metal donors in one alkaline medium.

Claims (1)

Claim: Process for the production of metal-containing azo dyes, which several Contain metals, characterized in that the complex chromium compounds, which can be produced according to patent 528 165 and which of diazotized i-amino-2-oxynaphthalene-4-sulfonic acids derive, treated with such metal compounds that other metals than chromium can give off.