The results of phenol aralkylation with components of the 130-170A degrees C fraction of pyrolysis products on zeolite impregnated with orthophosphoric acid in a flow reactor are presented. The optimal conditions of p-aralkylphenol synthesis have been found. Under the optimal conditions, the yield of the desired aralkylphenol was 53.6% of the theoretical value and the selectivity was 95.5%. A p-aralkylphenolamine resin was synthesized on the basis of p-aralkylphenol and hexamethylenetetramine and was tested as an antioxidant for M-8 motor oil at high temperatures.