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This research work concerns with the synthesis and characterization of fatty hydroxamic acid FHA from several vegetable oils namely, corn oil, palm oil, olive oil, soybean oil and sunflower oil. The synthesis of FHA from these vegetable oils was done by three methods, i) from fatty acids FA (carboxylic acid), ii) from methyl/ethyl fatty esters, iii) directly from triacylglyceride. The obtained FHA was characterized by colorimetric, FT-IR and mass spectroscopy. Three clays namely, white kaolin, red kaolin and bentonite were modified by these FHA. These modified clays were characterized by...