Home – Home – Jornals – Chemistry for Sustainable Development 2018 number 6

One of the possible variants of rational processing highly paraffinic gas condensate residues (HPGCR) with the maximum yield of low-sulphur medium-distillate fractions, i.e. hydrocracking in a fixed catalyst bed, was considered. Experiments were carried using a flow through plant. Home-made catalysts, such as KNT-442МNi (hydrorefining catalyst) and KNT-442NiY (hydrocracking catalyst) manufactured at the LLC Ishimbayskiy SKhZK, were used. Process temperature that ensures the maximum yield of diesel fraction was pre-selected. Considering the unique composition of HPGCR, the hydrocracking of initial raw materials, and also 350+ °С and 350–500 °С fractions, was investigated without their pre-preparation. As demonstrated by analysis of diesel fractions of hydrocracking products (180–350 °C), various variants of raw materials, regardless of their fractional composition and recirculation of residues, their key parameters meet the requirements for the commercial diesel fuel of environmental K-5 class. At the same time, regardless of the quality of initial raw materials, the products from variants with the recirculation of residues have somewhat improved characteristics. As demonstrated by analysis results for gasoline fractions (IBP – 180 °C), products have similar characteristics, regardless of the composition of initial raw materials and the residue recirculation mode. These fractions do not require preliminary hydroforming and may be directed to isomerisation and reforming plants. Among the variants considered, the hydrocracking of the initial HPGCR ensuring the maximum yield of diesel fraction and not requiring the preliminary fractionation of initial raw materials and the secondary processing of the primary distillate fractions and the residue is preferable.