CH287099A - Process for the preparation of a chromium-containing azo dye. - Google Patents

Description

  

  Additional patent to main patent no. <B> 284075. </B> Process for the production of an azo dye containing Ehrom. It has been found that -a valuable, new Ehrom-containing azo dye is obtained - if one uses the monoazo dye n of the formula
EMI0001.0013
         allows honorary funds to have an effect

            that an azo-dye containing earring is formed which contains two 31oiloa7o-dye molecules completely bound to a chromium atom.



  The new Ehrom-containing dye forms a bronzing black powder, which dissolves in water with a gray-blue color, in concentrated sulfuric acid with a red color, and dyes wool from a neutral or acetic acid bath in gray tones.



  The main patent provides information about the used Ehrom-donating agents and about the reaction conditions.



  <I> Example: </I> <B> 23.3 </B> parts of 6-Nitro-2-aniino-1-oxvbenzene-4-sulfonsliire, imide in 200 parts of water and <B> 15 </ B > Parts by volume 10-n-silicic acid slurried and diazotized at <B> 5 </B> to <B> 100 </B> with <B> 25 </B> parts by volume 4-N sodium nitrite solution. The diazo compound, neutralized by adding sodium carbonate, is allowed to run into a solution of <B> 22 which has been cooled with ice to <B> 00 </B>,

  9 parts 1-n-Butyrylaiuino-7-oxynaphthaliii in <B> 52 </B> parts by volume 2-n-Natriumhydro2z # vdlösu-ng and <B> 50 </B> parts by volume 2-u-sodium Line carbonate solution. After the coupling has ended, the deposited dye is filtered and washed with dilute sodium chloride solution. When dried it is a violet powder that dissolves in hot water with violet color and in concentrated sulfuric acid with pure red color.



  The filter cake of the dye obtained according to the above information is slurried in 1500 parts of water and mixed with 200 parts of a solution of sodium salicylic acid Kalhim with a chromium content of 1.8511 / a.

   The solution of Ehronisalieylsaurein potassium-sodium is obtained, for example, by boiling <B> 100 </B> parts of a chromium sulfate solution (Cr-SO, 1011) with a chromium content of 3.71 / o with <B> 19 , 6 </B> parts of salicic acid,

            Dissolve the resulting sediment by adding <B> 15 </B> parts by volume of 10 N sodium hydroxide solution and <B> 15 </B> by dividing the volume of 10 N potassium hydroxide solution and adjusting with water to 200 parts . The chronization mixture is kept at the boiling temperature for about 5 hours and the chromium compound of the paraffin thus obtained is separated off by adding sodium chloride and is filtered off.

 

Claims (1)

PATENT APPLICATION1: Process for the production of an original azo dye, which means that the mono dye of the formula EMI0002.0012 lets Ehroni-donating agents act in such a way that an azo dye containing Ehrom is formed, which contains two monoazo dye molecules bound to a Clironiatoni complex. The new chromium-containing dye forms a bronzing powder which dissolves in water with a gray-blue color, in concentrated sulfuric acid with a red color, and dyes wool from neutral or e ", 3-acidic baths in gray tones. SUBSTANTIAL CLAIMS: <B> 1. </B> Process according to patent claim, characterized in that one mole <B> kül </B> monoazo dye contains less than one atom of chromium in an amount of a human-releasing substance Means to act. 2. Method according to patent claims, characterized in that the treatment with the oromic-donating agents is carried out in an alhalic medium. <B> 3. </B> Process according to patent claim, characterized by the fact that chromium compounds are used as an atom-releasing agent, which release an aromatic o-ox: carbonic acid in complex bonds. 4th Process according to patent application, since by gelzennzeielinet -, (let nian as e11110111- releasing agent chromium compounds are used, which contain Salie: rlsäiii # e in a complex combination.