Cashew nutshell liquid extract as antioxidant for gasoline stabilization

Abstract

Investigations have been carried out converting hydrogenated cardanol, a compound extracted from cashew nutshell liquid, into compounds with structural characteristics of antioxidants similar to the ones used in product derived from petroleum. Thin-layer chromatography (TLC) analysis of the raw oil indicated that the major components were cardanol (66.7%), cardol (23.8%) and 2-methyl cardol (9.5%). The intended changes were carried out through exhaustive alkylation with n-butyl chloride. FTIR analysis confirms the formation of phenolic acid 2-n-butyl properties of the antioxidant produced. The performance of the product was estimated in terms of oxidative stabilization during storage of cracked naphtha. The compound 2-n-butyl pentadecylphenol (new antioxidant) has presented good efficiency in the storage assays when compared to the commercial additives used in the refinery.