Abstract: A 1.6 Mt/a solvent deasphalting unit of a certain refining and chemical enterprise has undergone significant changes in the properties of the planned processing stock compared to the original design of the unit. In order to explore suitable process operating conditions and production schemes for the present stock, a pilot study was carried out in cooperation with SINOPEC Research Institute of Petroleum Processing Co., Ltd., the suitable process operating conditions and product utilization scheme were found. After the application of the process conditions in the industrial plant, high-quality light deasphalted oil and heavy deasphalted oil products had be produced successfully. The deasphalted oil was used as a raw material for the secondary processing device, instead of expensive raw materials such as atmospheric residue, in optimizing the production process for the enterprise at same time to create better economic benefits

Key words: butane, vacuum residue, solvent deasphalting, two-stage extraction, deasphalted oil