Study on Purifying water Insoluble(Disperse) Dyes

부용성(분산)염료의 정제방법에 관한 연구

C.I. Disperse Red 15(60710) and yellow 3(11855) were purified by column chromatography, and dye purity was compared with the one obtained by solvent recrystallization, using melting point measurement and infra-red adsorption spectrum analysis. The authors used the following composition of column chromatographic system for the convenience of separating dye ingredients; 1. alumina; adsorbent. 2. benzene-pyridine(4:1) mixture; solvent for stationary phase. 3. water-pyridine(2:7) mixture; solvent for mobile phase. It is thought that the column chromatography in dye Purification is a suitable method, in case the recrystallization method is not applicable.