Ionic liquids (IL), which are part of Green Chemistry principles, have drawn much attention in recent years as alternative solvents and catalysts. Ionic liquids are often called as ―Green Solvents‖ or are associated with ―Green Chemistry‖. Ionic liquids (IL) have recently been increasingly employed because of their advantages such as their alternative solvent and catalytic ability, similarity with organic compounds and metal-organic catalysts, and easy separation ability from the reaction product. One of the unique features of IL is that it is compatible with most substances, including (co)polymers. Due to their different structures, polymers can be used in various fields, including carriers. Despite the advantages of IL, a certain amount of halogen atoms can enter to target product. Therefore, to avoid these processes different polymer surfaces were used. These surfaces combine with halogen or other atoms via different physicochemical bonds. This method proves to be valuable not only in the reuse process but also ecologically. The using of IL is very important in alkylation processes because of their (IL) important properties mentioned above. For many years, extensive research has been conducted on the alkylation of aromatic hydrocarbons with olefins in the presence of ionic liquid catalysts in our laboratory. It is known that the liquid fraction of reforming process (RPLF), which contains 50-60% of aromatic hydrocarbons, is used to obtain individual aromatic hydrocarbons. In our research, we carried out the process of alkylation directly without separating the aromatic hydrocarbons from RPLF with olefins in the presence of ionic liquid catalytic systems. The results were compared with the results obtained by alkylation of individual aromatic hydrocarbons in the presence of IL. The results obtained alkylation processes were analyzed by IR, UV, NMR – spectroscopy, DSC, FIA, chromatographic methods and proved that the alkylation process was going on. A graphical description of the process is presented below.