| 摘要 |
Animal hair grease is recovered in a high yield from a scouring waste liquid obtained from a scouring process of a raw animal hair material with a hydrophobic organic solvent and containing a scouring extract derived from the raw animal hair material. The process for this comprises the steps of: (A) converting the scouring waste liquid to a flock-forming liquid by the following operations, which may be carried out in any sequence, (a) adding water to the scouring waste, (b) adjusting the content of the scouring extract in the flock-forming liquid to 20% to 70% based on the entire weight of the flock-forming liquid, (c) adjusting the content of water in the flock-forming liquid to 2% to 110% based on the weight of the scouring extract, and (d) adjusting the temperature of the flock-forming liquid to 80 DEG C. to 100 DEG C., whereby flocks are formed in the flock-forming liquid; (B) removing the flock from the flock-forming liquid, whereby a residual liquid containing therein purified animal hair grease is obtained; and (C) recovering the animal hair grease from the residual liquid. |
