The invention discloses a
cleaner production method of ecological tanning of Tan
sheep skin, comprising the steps of preparation prior to tanning,
degreasing, soaking in water, fleshing,
degreasing, soaking in water,
softening and
pickling, tanning, neutralizing,
wet grinding and oxidizing washing, fat liquoring, neutralizing, outputting
skin and standing and clearing up. The
softening and
pickling comprises the following steps: edible salt,
formic acid and water are mixed to obtain first
mixed solution; fur fatting agent and
softening enzyme are added into the first
mixed solution and mixed uniformly to obtain softened
pickling solution and the softened pickling solution is heated to 48 DEG C; a Tan
sheep skin is put in the softened pickling solution in a drum, softening
enzyme is added into the softened pickling solution again, the drum rotates continuously for 6 hours and the softened pickling solution is filtered. The tanning comprises the following steps: the filtered softened pickling solution is put again in the drum in which the Tan
sheep skin is put,
formic acid solution and
sulfuric acid solution are added into the filtered softened pickling solution and the drum is rotated; edible salt,
formic acid, white tanning agent and water are mixed to obtain second
mixed solution and the drum is rotated continuously;
sodium formate, bicarb and soda ash are added for alkali adjustment; then the tanning of the Tan sheep
skin is finished.