A kind of preparation method of environment-friendly CI disperse orange 29
An environmentally friendly technology for dispersing oranges, applied in the direction of organic dyes, etc., can solve the problems of restricting product market application, anthranilic ether exceeding the standard, etc., and achieve the effect of economical, simple and efficient method
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Embodiment 1
[0020] Add 300 milliliters of water into a 3-liter beaker, and slowly add 84 grams of CI Disperse Orange 29 filter cake that can detect 6500 ppm of anthraniloid under stirring (add water according to the stirring situation). After all the addition was complete, stirring was continued for 2 hours.
[0021] Add water to adjust the volume to 2.5 liters, and add 35 grams of 30% sodium hydroxide solution to make the pH of the system greater than 9. Raise the temperature to 75-80°C and stir for 1 hour. Slowly add about 13 grams of 98% sulfuric acid (the amount is subject to the pH value adjustment) to adjust the pH value of the system to 7.5-8.0.
[0022] Vacuum filtration, washing the filter cake with water until the filtrate is basically colorless. Obtain 80 grams of CI Disperse Orange 29 filter cake that can detect 250 ppm of anthranil.
[0023] Sand the above-mentioned treated filter cake with 80 grams of diffusing agent (adjust the solid content of the slurry to 38-42% with ...
Embodiment 2-4
[0025] According to the steps and method of Example 1, changing the composition and dosage of alkaline substances and acidic substances can also obtain the finished product of CI Disperse Orange 29 which is environmentally friendly.
[0026] Example
[0027] In summary, the method of the present invention is simple and economical, and the limit of detectable anthranil in the dye product of CI Disperse Orange 29 is below 150ppm, which meets the national standard; thus the dyed textile meets the EU standard , therefore, has a strong promotional value.
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