Accession number: CAS[6486-23-3]; CI 11710

Catalog:Acetyl aromatic amine organic pigments

MF: C16H12Cl2N4O4

Molecular Weight: 395.20

 Structural formula:

Quality standard: (GB 3680).

 Quality:

Lightfast yellow H10G yellow, international index number 3 yellow-green light light yellow powder. Bright color, light resistance, good heat resistance, melting point 258 °C, slightly soluble in ethanol, benzene and acetone. It is yellow in concentrated sulfuric acid and light yellow after dilution; There was no change in concentrated nitric acid, concentrated hydrochloric acid and dilute sodium hydroxide.

 Method:

 1. Production principle

The red group 3GL is diazotized and conjugated with o-chloroacetylacetanilide to obtain the product.

 2. Technical formula

 3. Production equipment

Diazotization reaction pots, coupling pots, rinsing pots, storage tanks, drying ovens, pulverizers.

 4. Production process

 (1) Process 1

315kg of 98% sulfuric acid and 220kg of red-based 3GL were added to the acid-resistant reaction pot, stirred, heated and dissolved to prepare red-based 3GL sulfate for later use. Add 2000kg of water to the diazotization reaction pot, add red base 3GL sulfate under stirring, then add 3kg of aminotriacetic acid, add ice cubes to cool down, and then add 307kg of 30% sodium nitrite solution in batches for diazotization reaction. The feeding time of sodium nitrite solution is controlled at 1h, the diazotization reaction time is 1.5h, and the reaction temperature is 3°C. At the end of the reaction, 4kg of activated carbon and 18kg of 40% Turkish red oil were added for decolorization and filtration to prepare a red-based 3GL diazosalt solution. 3500kg of water was added to the coupling reaction pot, 390kg of 30% sodium hydroxide solution and 260kg of o-chloroacetyl acetanilide were added under stirring, and 1030kg of 18% acetic acid was added after stirring and dissolving, acid precipitation was carried out to make the pH value of the material 7.5, and then 431kg of 58% sodium acetate was added, and after mixing evenly, red base 3GL diazosalt solution was added in batches for coupling reaction. The feeding time of the diazonium salt solution was controlled at 22h, the coupling reaction temperature was 13°C, the reaction time was 2h, and the pH value of the material was 3.7. AT THE END OF THE REACTION, THE MATERIAL IS FILTERED, AND THE FILTER CAKE IS RINSED AND DRIED WITH WATER TO OBTAIN A SUNFAST YELLOW 10G.

 (2) Process 2

Add 2000L of water to the diazotization reaction pot, then add 1035kg of red base 3GL (1005s) and stir for several hours, then add 1800L of 5mo1/L hydrochloric acid, and add 788L of 40% sodium nitrite within 20min, the temperature is 0 °C, stir for 2.5h, the total volume is 11000L, and filter to obtain a diazonium salt solution.

The newly ground 436kg of o-chloroacetylacetanilide was added to 10000L of water at 25 °C, stirred for 2h, and then 2340kg of sodium acetate and 40L of glacial acetic acid were added, with a total volume of 29000L and a temperature of 25 °C to couple the component solution.

The diazo solution is added to the coupling solution from the liquid surface of the coupling component, the coupling feeding time is 4h, the temperature is 25 °C, then stirred for 0.5h, filtered and washed, and dried at 50~55 °C to obtain 2250kg of sunfast yellow 10G.

 (3) Process three

Add 3000L of water to the diazotization reaction pot, then add 600L of 5mol/L hydrochloric acid and 345kg of red base 3GL, stir overnight, and add 600L of 5mol/L hydrochloric acid and 1000kg of ice the next day at a temperature of 0 °C. Within 20min, 264L of 40% sodium nitrite was added under the liquid surface, the temperature was maintained at 0 °C, and the nitrite was slightly excessive, the total volume was 8000L, and the diazonium salt solution was filtered.

The newly ground 436kg o-chloroacetylacetanilide was dissolved in 196L of 33% sodium hydroxide and 10000L of water at a temperature of 25 °C and a volume of 27000L, and then acidified and precipitated with an acetic acid solution of 150L glacial acetic acid and 800L of water, and 500kg of sodium acetate was added, with a total volume of 29000L and a temperature of 25 °C, to obtain a coupling component solution.

Within 3h, diazonium solution was added under the liquid surface of the coupling components, the coupling temperature was 25 °C, the excess of the coupling components was maintained during the whole coupling process, and then stirred for 0.5h after completion, filtered and washed with water to obtain 3000kg of paste product.

 Use:

It is mainly used for coloring coatings, paint printing, inks, stationery and educational supplies and plastic products.