Title: Method for tanning dry-washing clothes leather using fat added carbamide ring tanning agent
Application Number: 92111015 Application Date: 1992.09.28
Publication Number: 1084893 Publication Date: 1994.04.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C14C3/08
Applicant(s) Name: Qing Batu Address: 100020
Inventor(s) Name:
Attorney & Agent:
Abstract:
     In softened waste liquid or clear water, alkyl sulfo ureane tanning agent C12 or/and C13 and methylol ureane tanning agent C12 or/and C13 is applied to treat penetratable naked leather, further the pickling is conducted by adding conventional amount of acid for pickling without adding salt, the acid is removed after balancing is reached, and balancing is kept at pH 8-9 so that preliminary tanning with ureane tanning agent is completed, and then the preliminary tanned leather is regulated to slight acidity, and the leather is retanned with chromium tanning agent.
Time: 9
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