Method for liming skins and hides
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United States of America Patent
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-
Oct 2, 1990
Grant Date -
N/A
app pub date -
Jan 26, 1989
filing date -
Jan 29, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for liming skins and hides with preservation and separation of the hair, including the following successive steps: (A) a soaking step in a aqueous liquor containing a surfactant; (B) an incubation step in an aqueous liquor free of inorganic sulfur but containing hydrotropes and organic sulfur compounds as unhairing agents; (C) an step for immunization of the hair at a pH between 10 and 14; (D) a hair loosening step in which inorganic sulfide is added to the float; (E) a separation step in which the hair is separated from the skins and hides; and (F) a liming step in which the pelts so obtained are limed in an aqueous alkaline liquor comprising liming aids.
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