NOVEL COMBINED METHOD FOR LANOLINE RECOVERY FROM SHEEPSKINS TANNERIES WASTEWATERS

MAIER STELIAN-SERGIU*, BUCISCANU INGRID, BADEA NICOLAE

„GH. ASACHI” TECHNICAL UNIVERSITY, BLVD. D. MANGERON 67, 700050 IAŞI, ROMANIA, *TEL. 0040 232 279 850, E-MAIL: SMAIER@CH.TUIAŞI.RO

Abstract

The paper presents a two-stage method for the fast and high-yield recovery of lanoline from spent woolen sheepskin scouring liquors. Through its characteristics, the resulting waxy matter allows a straightforward and efficient purification of lanoline. The first stage involves the selective removal of hydrophilic and medium hydrophobic nonlanoline constituents of the spent liquor, using conventional Al-pillared clays (Al-PILCs). The second stage consists in electrochemical separation of crude waxy matter in electro flotation cells operated in pulse-widthmodulated regime, at constant current density.

Keywords

lanoline recovery wastewater pillared clays electro flotation