Due to the tightening of environmental standards for both the fuels themselves and their emission products, research is currently being conducted to develop technologies to increase the yield of motor fuels by involving heavy oil residues in the process. This paper examines the deasphalting process, which was carried out using heavy oil residues as raw materials, and pentane, hexane and gasoline as solvents. The physicochemical properties of deasphalted products obtained in various solvents and at various ratios of raw materials were determined. The patterns of changes in physicochemical properties when these ratios change are studied. This article also examined the influence of a magnetic field on the qualitative and quantitative compositions of the resulting products. The experiments were carried out both under normal conditions and under the initial influence of a magnetic field on the raw materials. In particular, the influence of a magnetic field on the process of deasphalting tar and its physical and mechanical properties was studied. The optimal conditions for the deasphalting process have been determined. It has been established that deasphalted products obtained after initial exposure to a magnetic field can be used as an additive to catalytic cracking feedstock - vacuum gas oil. In order to study the effect of a magnetic field on the deasphalting process, a series of experiments were carried out at various solvent : raw material ratios, at a temperature of 160 degrees C and at a magnetic field strength of 1.4 Tesla. It has been established that under the influence of a magnetic field the performance of the tar deasphalting process improves. In order to select the optimal solvent, the process of catalytic cracking of mixtures of vacuum gas oil with gasoline deasphalted oil and pentane deasphalted oil obtained as a result of exposure to a magnetic field was carried out, and the results were compared. It has been established that the results of the catalytic cracking process of a mixture of vacuum gas oil and pentane deasphalted oil exceed the results of the process of catalytic cracking of a mixture of gasoline deasphalted oil and vacuum gas oil