The diploma thesis theme is thermochemical recovery, i.e., the process of pyrolysis of plastic waste which product is a synthetic oil used to obtain energy or produce a chemical. The thesis gives an overview of technological and economic parameters of existing plants for pyrolysis o plastic waste. The acceptable waste plastics for pyrolysis usually consists of PP, HDPE and LDPE, while PS and other plastics are somewhat less present. Many restrictions have been set for PVC and PET due to the final products' quality after the pyrolysis process. Thus, input raw materials require separation before the pyrolysis process. The aim of this thesis is to analyse the potential of pyrolysis plant for thermochemical conversion of industrial plastic waste that was built within the company request. The company is engaged in recycling industrial plastics from which high-quality granules are produced and sold on the market. An acceptable portion of residual industrial plastic waste that cannot be mechanically recycled would be treated by a pyrolysis process. There are currently about 365 tons of plastic raw materials per year that could be pyrolytically processed, due to the possibility of increasing the amount of acceptable plastic waste, plant capacity can be increased to 1825 tons per year. Within this paper, a review of the available literature was made, which considers collecting the parameters of input and output flows and existing plants' costs for plastic waste pyrolysis. All collected parameters were averaged together with the nominal capacities and used in the techno-economic and sensitivity analysis for two cases of input raw materials. The conducted budget determined the unprofitability of the projects in both cases. An additional analysis showed that by introducing a waste disposal fee, increasing the price of crude oil or reducing the investment cost, this technology could become economically viable. In the rest of the work, an analysis of the plant's capacity was conducted to see its impact on the project's economic viability.