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US 4,729,768 AGranted
Deliming of hides and use of cyclic esters of sulfurous acid as deliming agents
AssigneeBASF SE
InventorsKurt Schneider, Dietrich Lach, Rolf Streicher, Ortwin Schaffer
Life of this patent
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Abstract
In a particularly time-saving and economical process for deliming hides, a cyclic ester of sulfurous acid with an aliphatic 1,2-diol is used as the deliming agent.
Claims8
A process for deliming limed hides, which comprises:
- deliming hides, which have been treated with lime, with a compound of formula (I):
- ##STR2## wherein R.sup.1 is hydrogen, saturated alkyl of 1 to 4 carbon atoms or chlorosubstituted alkyl of 1 to 4 carbon atoms, and R.sup.2 is hydrogen or methyl.
Dependencies are inferred from the claim text.