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Title: Alum tanning process for edible collagen casing

Abstract: An improved process for tanning edible collagen food casings wherein the coagulated and washed collagen casing is exposed to a tanning bath which is free of aluminum chelating reagents and contains a mixture of aluminum ammonium sulfate, as A1NH.sub.4 (SO.sub.4).sub.2. 12H.sub.2 O and monobasic aluminum sulfate (A10HSO.sub.4), the concentration of the aluminum ammonium sulfate in the bath being less than 3% by weight and the molar ratio of aluminum ammonium sulfate to monobasic aluminum sulfate being in the range of 1:2 to 2:1.


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Inventors: Burke, Noel Ian (Danville, IL, US)

Application Number: 628260
Filing Date: 1975-11-03
Publication_date: 1976-09-21
Assignee: Tee-Pak, Inc. (Chicago, IL)
Primary Class(es): 426/273 264/202, 426/140, 426/277, 426/278
Other Classes:
US Patent Ref:
3123480Mar, 1964Lieberman426/140.
3151990Oct, 1964McKnight426/140.
3512997May, 1970Cohly et al.426/140.

Other Refs:
Primary Examiner: Monacell, A. Louis
Assistant Examiner: Massung, Esther L.
Attorney: Shapiro; Paul, Kerwin; Joseph E., Dittmann; William A.