Dispersion Orange Se-3gl Test Synthesis And Process Improvement

Disperse orange SE-3GL is an important double-azo-type coloring agent which may be served as one color of the three basic colors instead of disperse yellow RGFL. It can not only be used as the mono-color, but also has good performance of blending color. It has been used widely in the blending of some dark color, such as yellow-brown, dark blue, black etc., and has good fastness to subliming and level-dyeing properties.The mechanism of synthesis disperse SE-3GL in two steps of coupled reaction was discussed in this thesis, and the synthesis method and relative conditions to the synthesis in laboratory scale, such as suitable reaction temperature, the reaction time, and the optimized raw material proportion in the reaction, were developed and experimentally studied carefully. Based on the lab scale experimental study, the production process was extended to pilot-scale, and good results were achieved, which is the basis of the industry production.The total yield of orange SE-3GL produced through this process was more than 68%. Comparing with Shanghai standard, the color is slight green to slight red, and strength of raw dyestuff is about 330 degree .In addition to the high yield of orange SE-3GL, the quantity of wastewater drained was decreased. So the synthesis technology had not only good economic benefit, but also good benefit to the environmental protection as well.