Abstract: The solute of the wool in heating process was researched. Then, the property of the solute was discussed and the influence of the solute to the property of potassium dichromate in the aqueous solution and to the adsorption between potassium dichromate and the wool fabric were researched. The results showed that the solute was soluble protein. With the existing of the soluble protein, the CrⅥ in the potassium dichromate was transformed into CrⅢ and because of the little substantively of the CrⅢ to wool, the chrome content was increased in the residual liquid of the dying process with acid mordant dye. So the research was significant to study the reason of chromium pollution in the dying process with acid media dye.

Key words: soluble protein, potassium dichromate, total chromium, wool, adsorption