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Primary Examiner: Clingman, A. Lionel
Assistant Examiner:
Attorney: Curtis, Morris & Safford

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Title: Treatment of sulfide-limed pelts in acid baths

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Claims: What is claimed is:

1. In the method of treating sulfide-limed pelts with an acid treating bath, the improvement werein said treating bath contains a water-soluble salt of manganese, cobalt, nickel, titanium, or zirconium and wherein said treating bath is brought into contact with oxygen.

2. A method as in claim 1 wherein said treatment with an acid treating bath is a de-liming, bating, pickling, or pre-tanning treatment.

3. A method as in claim 1 wherein the pH of the acid treating bath is between 2 and 7.

4. A method as in claim 1 wherein said water-soluble salt is present in said treating bath in an amount between 50 and 5000 parts per million.

5. A method as in claim 1 wherein said water-soluble salt is a manganese-II salt.

6. A de-liming, bating, pickling or pre-tanning agent of conventional composition additionally comprising a water soluble salt of manganese, cobalt, nickel, titanium, or zirconium.

7. An agent as in claim 6 which comprises from 2 to 20 percent by weight of said water-soluble salt.

8. A de-liming agent comprising conventional de-liming chemicals and, additionally, 2 to 20 percent by weight of manganese-II sulfate or manganese-II-chloride.

9. A bating agent comprising conventional bating enzymes and bating auxiliaries and, additionally, 2 to 20 percent by weight of manganese-II-sulfate or manganese-II-chloride.

Other info:

Inventors: Monsheimer, Rolf (Darmstadt-Eberstadt, DE, US)
Pfleiderer, Ernst (Darmstadt-Arheilgen, DE, US)

Application Number: 793407
Filing Date: 1977-05-03
Publication_date: 1978-08-08
Assignee: Rohm GmbH (Darmstadt, DE)
Primary Class(es): 8/94.17 8/94.1R, 8/94.18, 8/94.25
Other Classes:
US Patent Ref:
Other Refs: Other References: strack, W., Das Leder, 1967, 18, pp. 233-235.
Zehender, F., "Oxidation of Sulfide-Sulfur with Manganese Salt", Chem. Abs., 1970, 73 (No. 8).