APPLICATION OF MICROFILTRATION FOR THE REGENERATION OF USED TRANSMISSION OILS

Abstract

The process of regeneration of used gear oils on various types of microfiltration membranes (polymer, cermet, ceramic, and carbon with pore size 03-0.1 µm) on a flow-through installation with partial retentate extraction. Before membrane separation, the oil was subjected to coagulation to destroy the colloidal system and neutralize naphthenic and naphthenoaromatic acids. Experiments on membrane separation of regenerated oils were carried out at a pressure in the pressure channel of 0.1–0.5 MPa, a temperature of 40–140 °C, and a speed of 1–3 m/s. Optimal parameters of the membrane separation process were selected . The formation of a dynamic layer from asphalt-resinous compounds of gear oils is shown. A clarified transmission ¬oil on polymeric, metal-ceramic and carbon membranes was obtained. It has been shown that the degree of selectivity for monoethanolamine and asphalt-resinous compounds of transmission oil depends on the membrane material and the size of the membranes used.