ACID CORROSION INHIBITORS AND BIOCIDES BASED ON 2-ALLYL- AND 2-PROPENYLPHENOLS

By triple condensation of 2-propenyl-and 2-allylphenols with formaldehyde and morpholine, their aminomethyl derivatives of various structures were obtained.Based on the obtained aminomethyl derivatives, water-soluble quaternary ammonium salts were synthesized by treating them with hydrogen bromide, allyl bromide and propargyl bromide with the yields 75-85%.The structures of the synthesized compounds were determined by IR and NMR spectroscopy.The anti-corrosion properties of ammonium salts based on aminomethyl derivatives of 2-allyl-and 2-propenylphenols were studied in an acidic 0.5 N sulfuric acid medium (at 25 and 40°C) at the concentration of compounds 0.01, 0.02 and 0.05 g/L, as well as in aqueous-salt-hydrocarbon environment saturated with hydrogen sulfide (at 25°C) at the concentration of 0.05 and 0.1 g/L using the gravimetric method on steel St.3.It was revealed that their protective properties are significantly influenced by the presence of bromine anions and morpholinium-containing fragments in their structures.The higher inhibitory properties were found for the compound with a propargyl fragment.At their concentration of 0.02 and 0.05 g/L in an environment of 0.5 N H2SO4, the degree of corrosion protection of steel St.3 is 97.4 and 99.0% (at 25°C) and 94.7 and 97.8% (at 40°C), respectively, in a water-salt environment saturated with hydrogen sulfide, at the concentration 0.1 g/L is 96.9%.Watersoluble ammonium salts have also been studied as reagents to inhibit the growth of sulfate-reducing bacteria at a concentration of compounds 0.2 g/L.It has been shown that the compounds at the indicated concentrations have bactericidal activity.It has been established that compounds containing an allylic and propargyl fragment in their structures have higher activity