Studies on the Characteristics of Humic Acid and Its Utilization (V). Manufacturing of Sulfur-dyes from Humic Acid

[摘要] Sulfur-dyes were manufactured from humic acid, Na2S2¡­3 and other additives at 200¡­250¡É for 3¡­20 hrs. Sulfur-dyes from humic acid were fundamentally brown colors and could be changed from yellowish to grayish brown according to the additives. The colorfastness to rubbing and laundering were excellent but to weather was fair. Characteristic bonds of sulfur-dyes such as -C-S-C, -C-SO-C-. -C-SO2-C-, and -C-O-SO2-O-C- were confirmed but thiazole bond and thiazine ring were not done by IR-spectroscopy.

[学科分类] 化学（综合）