Abstract: A quantitative analysis method was established for the extraction of semi-volatile organic compounds from refinery waste catalysts by pressurized fluid extraction with dichloromethane/ acetone as extraction solvent. The mixture of nitric acid and sulfuric acid was used to prepare the leaching solution, and the quantity was determined by GC-MS combined with internal standard curve method. The detection limit, linearity, repeatability and recovery rate of the established method were investigated. The results showed that the method could be used for the detection of semi-volatile organic compounds in the organic extraction solution and leaching solution of waste catalyst. Three typical refinery waste catalysts from six different petrochemical companies were selected and their organic extracts and volatile organic compound were analyzed and compared. The concentrations of semi-volatile organic compounds in organic extracts and leachates were below the current limit value for hazardous waste in the series standards, providing a scientific basis for management decision on the disposal of refinery waste catalyst and support for petrochemical enterprises to prevent environmental risk.

Key words: refinery waste catalyst, semi-volatile organic compounds, hazardous waste characteristics