Preparation of coloured pigments for surface coating from petroleum fractions

Abstract

A petroleum fraction having a boiling range 200–250°C (kerosene), free from aromatic and n‐paraffin hydrocarbons was oxidised by bubbling air at 130–150°C, at normal pressure, in the presence of cobalt naphthenate as a catalyst. Optimum yield of oxynaphthenic acid was obtained after sixteen hours and thirty minutes oxidation at 140°C. Two layers were formed, the bottom product was a viscous liquid insoluble in petroleum ether and alcohols. Oxyacids, mainly hydroxy naphthenic acids, were obtained after treatment and purification of the viscous liquid.

Citation

Amin Fam, S. and Abdel‐Mohsen, F.F. (1984), "Preparation of coloured pigments for surface coating from petroleum fractions", Pigment & Resin Technology, Vol. 13 No. 8, pp. 4-17. https://doi.org/10.1108/eb042045