C.I. Disperse Red 74

Using meta-nitroaniline and p-nitroaniline as the main raw materials, firstly, meta-nitroaniline and ethylene oxide are ethoxylated, then esterified with acetic anhydride, and then reduced by catalytic hydrogenation, and propionyl ( Or acetylation to obtain the coupling component; then diazotize the p-nitroaniline to couple with the coupling component to obtain the product. After filtering, grinding and drying, the finished product is obtained. . The synthesis of coupling components can also be carried out as follows:. The following methods are used to synthesize domestic dye coupling components:. Add 236kg of water and 38.6kg of m-phenylenediamine (98%) into the acylation pot, raise the temperature to 60-65℃, wait until all the materials are dissolved, cool to 28℃, add 47kg of hydrochloric acid (30%) dropwise within 2h to maintain 28-32℃, continue to stir for 15min, add 52.5kg refined salt (industrial product), stir for 30min, then at 28-32℃, add acetic anhydride (90%) dropwise within 2h, and keep for 1h after adding. After filtration, the filter cake was washed with saturated brine at 15-30°C until the filtrate was colorless and set aside. Add the above acylated product and 120kg of water to the enamel pot, slowly raise the temperature to 70-75°C, stir for 15min, start bubbling in ethylene oxide (about 50kg) until the end of the reaction. Then it is concentrated at 53.3kPa (about 95-100℃) until the water content is 15%-20%. Cool down to 50℃, add 17.05kg of acetic acid (98%), increase the temperature to 80℃ within 0.5-1h, slowly add 125.5kg of acetic anhydride (98%), maintain 80-90℃, and add it in about 2h. Then increase the temperature to 95-100°C and keep it for 3 hours to the end of the reaction. When the temperature is lowered to 25-30°C, about 70kg of the coupling components are obtained. Diazotize 32.2kg of p-nitroaniline (93%), 79kg of hydrochloric acid (30%), and 17.4kg of sodium nitrite (93%) at 0-5℃, and then conduct coupling reaction with the coupling components at 15-20℃ 4-5h, about 63kg of dye (dry product).

Mainly used for dyeing and printing of polyester and blended fabrics, but also for the dyeing of acetate fiber and triacetate fiber

Molecular Weight:471.5
XLogP3:3.2
Hydrogen Bond Donor Count:1
Hydrogen Bond Acceptor Count:10
Rotatable Bond Count:12
Exact Mass:471.17539815
Monoisotopic Mass:471.17539815
Topological Polar Surface Area:156
Heavy Atom Count:34
Complexity:714
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes