The article discusses the study of the effect of new types of depressant mixtures on the hydrocarbon
composition of diesel fuel using the method of thin-layer viscography and mass-selective gas
chromatography. When using fuel derived from paraffin-based oil, difficulties arise due to the simple
operation of the engine at high freezing temperatures and low temperatures, which require a special fuel
preparation system. Diesel fuel contains a lot of hydrocarbons that boil at high temperatures. Paraffinic
hydrocarbons from hydrocarbon atoms with a long, unbranched chain have high melting points. To
obtain the necessary low-temperature diesel fuel, the fractional composition is clarified and purified
from paraffin. Both of these production processes are expensive and require significant financial costs.
Currently, it is impossible to obtain diesel fuel without additives. Therefore, in the production of
commercial hydrotazed diesel fuel, it becomes necessary to use a large number of mixtures.
Multicomponent mixtures must meet a number of requirements and have high thermal properties that
ensure efficient operation of the engine at high temperatures in accordance with its high functional
characteristics, as well as freezing point and maximum filtration temperature. In this regard, a decent
and cost-effective solution to this problem can be achieved by adding a highly effective depressant
mixture to the fuel composition, which reduces the freezing point of crude petroleum products made of
quick-drying paraffin. When choosing a depressor for various paraffin fuels, the most important thing is
to take into account the chemical composition and efficiency of the base fuel. The use of a depressant
additive is one of the effective methods that improve the properties of oil and petroleum products. The
depressant mixture prevents the precipitation of solid hydrocarbons in crystalline form. The effect of
paraffin on crystals, its introduction into the crystal lattice and the deterioration of the formation of a
solid frame occurs due to the adsorption of the mixture. The use of a depressant mixture is in most cases
the basis for getting rid of the expensive process of oil and petroleum dewaxing.