Characterization of Sulfited Fat from Limed Hides Fleshing as a Leather Fatliquor

Abstract

The limed fleshing is generated in the beam house process, is the largest amount of waste, rots easily and causes a pungent smell that pollutes the environment. The use of limed fleshing in fatliquor is an effort to suppress the occurrence of pollution. The purpose of this study is to determine the physico-chemical properties of fatliquor from limed fleshing. Delimed fleshing with ammonium sulfate and water on a rotating drum. Fat was extracted from delimed fleshing using the wet rendering method and purified using n-hexane. The fat from delimed fleshing was characterized and then processed into a fatliquor. The fatliquors is prepared by reacting fat with aqueous sodium bisulfite (0.5, 1.0, 1.5, 2.0, and 2.5 mol/kg based on fatty matters) at a temperature of 85° C for 2 hours. The results showed that fat from limed fleshing can be used to produce fatliquors substances. Based on the physico-chemical properties, the best fatliquors agent is prepared by treating sodium bisulfite with 2.0 mol/kg based on fatty matters.