Efficiency of heavy metallic soap produced from naphthalic acid recovered from used lubricating oil in paint formulation..

Abstract

This work was carried out with the main aim of putting into use waste lubricating oil, thereby reducing the environmental hazard accruing to waste lubricating oil. This was achieved by the recovery of naphthenic acid from the used lubricating oil and consequently converting it to a heavy metallic soap drier (cobalt naphthenate) which was further used in an alkyd paint formulation. The cobalt naphthenate was produced by the double decomposition of cobalt chloride with sodium naphthenate. The sodium naphthenate was nevertheless first prepared from the reaction of sodium hydroxide and naphthenic acid extracted from the used/waste lubricating oil. The drying times of the formulated alkyd paint were then tested with respect to the mass of the drier added to a given quantity of the paint. The results were also compared with that of the commercial paint to ascertain its quality as regards to those sold in the market.