Catalog:Acetyl aromatic amine organic pigments

Registry number: CAS[6528-34-3]; CI 11740

Molecular Formula: C18H18N4O6

Molecular Weight: 386.36

 Structural formula:

 Quality Standards:

 Pigment properties:

No. 65 yellow is a yellow powder. Slightly soluble in ethanol, acetone and benzene. The color is bright, the light is good, and the heat resistance is excellent. The relative density is 1.10~1.49.

 Method:

 1. Production principle

After diazotization of m-nitromethoxyaniline, it was coupled with o-methoxyacetoacetanilide to obtain Hansa yellow RN.

 2. Technical formula

 3. Production process

 (1) Diazotization

In the diazotization reaction pot, 67.2kg of m-nitrop-methoxyaniline was added to 230L of 5mol/L hydrochloric acid and 800L of water, and stirred overnight. The next day, add ice to cool to 0 °C, add 52.6L of 40% (mass fraction) sodium nitrite solution for diazotization, the reaction is completed, dilute to a total volume of 1400L, and add 4kg of activated carbon, filter, to obtain diazonium salt solution.

 (2) Coupling

85kg of o-methoxyacetylacetanilide was dissolved in 55kg of 33% (mass fraction) sodium hydroxide solution and 1000L of water, 72kg of sodium acetate was added, and then a dilute solution made of 26L of glacial acetic acid diluted with 300L of water was slowly added, and then the suspended solids were diluted to a volume of 3200L to obtain a coupling component. The coupling components were added to the diazo solution from the liquid surface within 1.5h, the coupling temperature was 20 °C, then stirred for 0.5h, filtered, washed with water, and dried at 50~55 °C to obtain Hansa Huang RN 137.5kg.

 Use:

It is used for coloring coatings, paint printing, inks, color pigments, stationery and plastic products.