The protective properties of six corrosion inhibitors based on imidazolines, amides, amines and esters have been determined using gravimetric and potentiometric methods. The effect of inhibitor solvent on the protective properties has been examined. The dependence of inhibitor protective effect upon the content of nitrogen and functional groups has been determined. The most effective inhibitors have been chosen and their IR-spectra have been shown.

The textbook contains information: on the general characteristics and technical requirements for plastic oils; about the composition of plastic oils; about the basic physical and chemical, operational, ecological properties of plastic lubricants and methods of their definition. Considerable attention is paid to the classification, range and labeling of lubricants. The basic technological schemes of production of plastic lubricants are considered. Attention is also paid to the safety and protection of the environment during the production and use of plastic lubricants. The considered textbook plays an important role in the formation of professional knowledge in students of 161 specialties "Chemical Technology and Engineering" and students of higher technical educational institutions of III-IV levels of accreditation of related fields of knowledge. It can be useful for oil and gas professionals and engineers involved in the operation of machinery and the use of fuel, lubricants and technical fluids.

The article deals with the investigation results of nitrogen-containing compounds solubility in non-polar and polar solvents, as well as low-temperature properties of formed solutions and their anticorrosive properties as corrosion inhibitors in the hydrocarbon-water two-phase system.

New polyesters have been obtained on the basis of C9 petroleum resin with carboxyl groups and polyethylene glycols. The average molecular mass of the petroleum resin is 1050, its functionality = 1.74. Optimal for the polyesters synthesis is the equimolar ratio between the initial compounds. The reaction is performed in the melt in the presence of p-toluenosulphuric acid as the catalyst. In the optimal temperature range 150 - 190oC the yield of the process ranges from 91 to 94 % depending on the conditions. The rate of the polyester formation reaction practically does not depend on the length of the acids or the alcohol chain molecules. The functionality is the decisive factor. We report the degrees of polycondensation of the new polyesters.