Tanning method

Details Tanning method Tanning method

1979-10-23

1982-02-09

Tungol, Maria Parrish

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 9418, 8 9427, C14C 306

Patent

active

043148034

ABSTRACT:
By subjecting a hide which has completed beamhouse work to a pickling treatment in the presence of urotropin (hexamethylenetetramine) and then to a chrome-tanning treatment, pH control of chrome-tanning bath becomes simpler and easier, the combination between hide and basic chrome complex increases, and the amount of residual chromium in the waste water can be minimized. Further, by treating the formed leather which has completed tanning treatment with ammonia or ammonium salt of weak acid in the chrome bath after use, the workability in the finishing steps improves, quality of the leather additionally improves, and the chromium content of the residual solution can be made nearly zero.

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